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Old 20-12-2007, 04:30 AM posted to rec.gardens
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Default Sunlight and Plants

Hello all:

I am a relatively new member of this group, and I looked over the most
recent messages before I decided to write this post. I have a question
dealing, specifically, with the general 'household plant," and the
degree of sunlight that is warranted for such plants.

Question: Is there a means by which one can identify those plants that
require varying degrees of sunlight? Is there a mean of relating this
to the type of leaf, for example? And, if this is true, is it also
true that the typical "household plant" lights that one sees in local
stores are almost as effective as natural sunlight? If the answer is
"yes," or "perhaps," then would it be normal to think that one should
use such a light during the normal "rise and fall" of the sun
throughout the day, for example, during those days and weeks of little
to no sunlight for various reasons.

Thanks,

Mark
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Old 20-12-2007, 05:52 AM posted to rec.gardens
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Posts: 2,265
Default Sunlight and Plants

In article
,
Mea505 wrote:

Hello all:

I am a relatively new member of this group, and I looked over the most
recent messages before I decided to write this post. I have a question
dealing, specifically, with the general 'household plant," and the
degree of sunlight that is warranted for such plants.

Question: Is there a means by which one can identify those plants that
require varying degrees of sunlight? Is there a mean of relating this
to the type of leaf, for example? And, if this is true, is it also
true that the typical "household plant" lights that one sees in local
stores are almost as effective as natural sunlight? If the answer is
"yes," or "perhaps," then would it be normal to think that one should
use such a light during the normal "rise and fall" of the sun
throughout the day, for example, during those days and weeks of little
to no sunlight for various reasons.

Thanks,

Mark


You might Google, question dealing, specifically, with the general
"household plant". It's true you know about JSB. His hovercraft IS full
of eels. What are you wearing for Beltane's Day? Don't over dress;-)
--

Billy

Bush & Cheney, Behind Bars
http://www.gallup.com/poll/102577/Half-Strongly-
Disapprove-Bush-Job-Performance.aspx

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Old 20-12-2007, 07:47 AM posted to rec.gardens
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Posts: 438
Default Sunlight and Plants


"Mea505" wrote in message
...
Hello all:

I am a relatively new member of this group, and I looked over the most
recent messages before I decided to write this post. I have a question
dealing, specifically, with the general 'household plant," and the
degree of sunlight that is warranted for such plants.

Question: Is there a means by which one can identify those plants that
require varying degrees of sunlight? Is there a mean of relating this
to the type of leaf, for example?


There is no such rule that I know of. Many houseplants come from jungles etc
where they naturally get filtered sunlight but still some need more than
others. Most benefit from at least strong indirect light and many benefit
from some sun. You cannot grow anything but fungi in near dark. How much
light each plant wants is dealt with in good books on the subject. Some are
rarely seen at their best or never flower because they don't get enough light.

And, if this is true, is it also
true that the typical "household plant" lights that one sees in local
stores are almost as effective as natural sunlight?


Well no because the sun is much more powerful, it takes very strong artificial
light to be as bright as the sun which chews up lots of power. Normal house
plant lights are useful as a supplement to natural light if you don't have
sun-facing windows but it would be rare for them to be able to replace it.
Also the brighter the light the more heat it produces which can be an issue.
Some types are more efficient than others but all produce some heat. There is
also the factor that the strength of light falls away quickly with distance,
so the plant that is right under the lamp gets way more than one at the side.

If the answer is
"yes," or "perhaps," then would it be normal to think that one should
use such a light during the normal "rise and fall" of the sun
throughout the day, for example, during those days and weeks of little
to no sunlight for various reasons.


I don't think the timing makes any difference.

David


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Old 20-12-2007, 11:42 AM posted to rec.gardens
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Posts: 13
Default Sunlight and Plants

I apologize, Billy; although I agree with your dogmatic views about
the present administration, I don't get the link between what I typed
and then how you chose to respond. Perhaps there is something like an
"inside joke" going on within the group?

Mark


On Dec 20, 12:52 am, Billy wrote:
In article
,





Mea505 wrote:
Hello all:


I am a relatively new member of this group, and I looked over the most
recent messages before I decided to write this post. I have a question
dealing, specifically, with the general 'household plant," and the
degree of sunlight that is warranted for such plants.


Question: Is there a means by which one can identify those plants that
require varying degrees of sunlight? Is there a mean of relating this
to the type of leaf, for example? And, if this is true, is it also
true that the typical "household plant" lights that one sees in local
stores are almost as effective as natural sunlight? If the answer is
"yes," or "perhaps," then would it be normal to think that one should
use such a light during the normal "rise and fall" of the sun
throughout the day, for example, during those days and weeks of little
to no sunlight for various reasons.


Thanks,


Mark


You might Google, question dealing, specifically, with the general
"household plant". It's true you know about JSB. His hovercraft IS full
of eels. What are you wearing for Beltane's Day? Don't over dress;-)
--

Billy

Bush & Cheney, Behind Barshttp://www.gallup.com/poll/102577/Half-Strongly-
Disapprove-Bush-Job-Performance.aspx- Hide quoted text -

- Show quoted text -


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Old 20-12-2007, 11:46 AM posted to rec.gardens
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Posts: 13
Default Sunlight and Plants

David:

Your answers were extremely helpful.

I only hope that I am replying using the correct protocol for this
group.
Thanks for taking so much time in responding. Your answers were/are
extremely helpful. I asked the question for several reasons; but one
of the
main reasons was my "re-newed" interest in house plants and my recent
purchase of a bulb to use in home, as I suggested. But, I do see your
point. It is interesting to note how the "common house plant" has been
derived.

Mark

On Dec 20, 2:47 am, "David Hare-Scott" wrote:
"Mea505" wrote in message

...

Hello all:


I am a relatively new member of this group, and I looked over the most
recent messages before I decided to write this post. I have a question
dealing, specifically, with the general 'household plant," and the
degree of sunlight that is warranted for such plants.


Question: Is there a means by which one can identify those plants that
require varying degrees of sunlight? Is there a mean of relating this
to the type of leaf, for example?


There is no such rule that I know of. Many houseplants come from jungles etc
where they naturally get filtered sunlight but still some need more than
others. Most benefit from at least strong indirect light and many benefit
from some sun. You cannot grow anything but fungi in near dark. How much
light each plant wants is dealt with in good books on the subject. Some are
rarely seen at their best or never flower because they don't get enough light.

And, if this is true, is it also

true that the typical "household plant" lights that one sees in local
stores are almost as effective as natural sunlight?


Well no because the sun is much more powerful, it takes very strong artificial
light to be as bright as the sun which chews up lots of power. Normal house
plant lights are useful as a supplement to natural light if you don't have
sun-facing windows but it would be rare for them to be able to replace it.
Also the brighter the light the more heat it produces which can be an issue.
Some types are more efficient than others but all produce some heat. There is
also the factor that the strength of light falls away quickly with distance,
so the plant that is right under the lamp gets way more than one at the side.

If the answer is

"yes," or "perhaps," then would it be normal to think that one should
use such a light during the normal "rise and fall" of the sun
throughout the day, for example, during those days and weeks of little
to no sunlight for various reasons.


I don't think the timing makes any difference.

David




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Old 20-12-2007, 12:07 PM
mor mor is offline
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Posts: 65
Default

Quote:
Originally Posted by David Hare-Scott View Post
"Mea505" wrote in message
...
Hello all:

I am a relatively new member of this group, and I looked over the most
recent messages before I decided to write this post. I have a question
dealing, specifically, with the general 'household plant," and the
degree of sunlight that is warranted for such plants.

Question: Is there a means by which one can identify those plants that
require varying degrees of sunlight? Is there a mean of relating this
to the type of leaf, for example?


There is no such rule that I know of. Many houseplants come from jungles etc
where they naturally get filtered sunlight but still some need more than
others. Most benefit from at least strong indirect light and many benefit
from some sun. You cannot grow anything but fungi in near dark. How much
light each plant wants is dealt with in good books on the subject. Some are
rarely seen at their best or never flower because they don't get enough light.

And, if this is true, is it also
true that the typical "household plant" lights that one sees in local
stores are almost as effective as natural sunlight?


Well no because the sun is much more powerful, it takes very strong artificial
light to be as bright as the sun which chews up lots of power. Normal house
plant lights are useful as a supplement to natural light if you don't have
sun-facing windows but it would be rare for them to be able to replace it.
Also the brighter the light the more heat it produces which can be an issue.
Some types are more efficient than others but all produce some heat. There is
also the factor that the strength of light falls away quickly with distance,
so the plant that is right under the lamp gets way more than one at the side.

If the answer is
"yes," or "perhaps," then would it be normal to think that one should
use such a light during the normal "rise and fall" of the sun
throughout the day, for example, during those days and weeks of little
to no sunlight for various reasons.


I don't think the timing makes any difference.

David
Depending on the house hold plant you have . unless of crouse is very special. house hold plant donot require alot of light. the only problem would be with watering. l have notices that during summer my plants tend to weather off. leafs turning burn. l tend to keep them in the shade. where do you leave?
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Old 20-12-2007, 12:17 PM posted to rec.gardens
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Posts: 305
Default Sunlight and Plants

On Wed, 19 Dec 2007 20:30:14 -0800 (PST), Mea505
wrote:

Hello all:

I am a relatively new member of this group, and I looked over the most
recent messages before I decided to write this post. I have a question
dealing, specifically, with the general 'household plant," and the
degree of sunlight that is warranted for such plants.

Question: Is there a means by which one can identify those plants that
require varying degrees of sunlight? Is there a mean of relating this
to the type of leaf, for example? And, if this is true, is it also
true that the typical "household plant" lights that one sees in local
stores are almost as effective as natural sunlight? If the answer is
"yes," or "perhaps," then would it be normal to think that one should
use such a light during the normal "rise and fall" of the sun
throughout the day, for example, during those days and weeks of little
to no sunlight for various reasons.

Thanks,

Mark



I think your question is too general, you need to look into the
specific requirements of the particular plants you are trying to grow.

Sanseveria needs very little light, radishes need a lot. African
violets, somewhere in between.

Most of my reading lately has been for aquarium plants, they do well
with fluorescent lights.

Plants, in general, need mostly red and some blue colors in the
spectrum, the "Gro-lux" tube is designed to provide these. A problem
I had with them, they just don't look the way I wanted things to look.

Some time ago the standard recommendation was a combination of cool
white and warm white bulbs. I also remember somewhere on the web
reading that in a particular trial cool white was as good as anything.

It takes a lot of light to equal the sun light for intensity, mostly
plants selected for growing indoors are low light plants, many would
burn if put outdoors in full sun. Most are also tropical plants,
which are day-neutral, that is not affected much by the length of
light period. I'd start with 12 hours, see how that works.
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Old 20-12-2007, 06:13 PM posted to rec.gardens
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Posts: 2,265
Default Sunlight and Plants

In article
,
Mea505 wrote:

I apologize, Billy; although I agree with your dogmatic views about
the present administration, I don't get the link between what I typed
and then how you chose to respond. Perhaps there is something like an
"inside joke" going on within the group?

Mark


On Dec 20, 12:52 am, Billy wrote:
In article
,





Mea505 wrote:
Hello all:


I am a relatively new member of this group, and I looked over the most
recent messages before I decided to write this post. I have a question
dealing, specifically, with the general 'household plant," and the
degree of sunlight that is warranted for such plants.


Question: Is there a means by which one can identify those plants that
require varying degrees of sunlight? Is there a mean of relating this
to the type of leaf, for example? And, if this is true, is it also
true that the typical "household plant" lights that one sees in local
stores are almost as effective as natural sunlight? If the answer is
"yes," or "perhaps," then would it be normal to think that one should
use such a light during the normal "rise and fall" of the sun
throughout the day, for example, during those days and weeks of little
to no sunlight for various reasons.


Thanks,


Mark


You might Google, question dealing, specifically, with the general
"household plant". It's true you know about JSB. His hovercraft IS full
of eels. What are you wearing for Beltane's Day? Don't over dress;-)
--

Billy

Bush & Cheney, Behind Barshttp://www.gallup.com/poll/102577/Half-Strongly-
Disapprove-Bush-Job-Performance.aspx- Hide quoted text -

- Show quoted text -


First thing, I suggest is that you get a brain or use the one that came
with the original equipment.

Secondly, Dogmatic: Characterized by an authoritative, arrogant
assertion of unproved or unprovable principles. See Synonyms at
dictatorial. [Late Latin dogmaticus, from Greek dogmatikos, from dogma,
dogmat-, belief. See DOGMA.]

Shirley, you must have confused me with "Doo". From 2 stolen elections,
to fabricating a war for fun and profit, to overthrowing laws about
torture, to overthrowing the 800 year tradition of habeas corpus,
branding Bush as a fascist thug is far from dogmatic.

Still with me? You didn't google "degree of light warranted by general
household plant" did you? Why did you ask a question if you weren't
prepared to accept the answer? If you had googled "degree of light
warranted by general household plant", you may have noticed that it
generated 67,500 responses. What would that have suggested to you?

Then the question that you actually posed, "would it be normal to think
that one should use such a light (almost as effective as natural
sunlight) during the normal "rise and fall" of the sun throughout the
day, . . . " was predicated on three premises that were untested, which
would explain the 67,500 google responses.

Most posters to "wrecked gardens" enjoy aiding fellow gardeners but we
really aren't prepared for life support. I'm overjoyed that during this
season of good will, that you received some responses to your question
even though it seems that the responders put in more effort than you did.

(1) Google it.
(2) Ask one question at a time.

As for JoeSpareBedroom and his hover craft full of eels, I have seen it
myself, through the eyes of faith.

Lastly, during Beltane you don't want any untimely wardrobe
entanglements.

--
Bush Behind Bars

Billy
http://angryarab.blogspot.com/
  #9   Report Post  
Old 20-12-2007, 07:20 PM posted to rec.gardens
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First recorded activity by GardenBanter: Aug 2007
Posts: 236
Default Sunlight and Plants

Billy, still ingesting to much of his home product.


"Billy" wrote in message
...
In article
,
Mea505 wrote:

I apologize, Billy; although I agree with your dogmatic views about
the present administration, I don't get the link between what I typed
and then how you chose to respond. Perhaps there is something like an
"inside joke" going on within the group?

Mark


On Dec 20, 12:52 am, Billy wrote:
In article
,





Mea505 wrote:
Hello all:

I am a relatively new member of this group, and I looked over the
most
recent messages before I decided to write this post. I have a
question
dealing, specifically, with the general 'household plant," and the
degree of sunlight that is warranted for such plants.

Question: Is there a means by which one can identify those plants
that
require varying degrees of sunlight? Is there a mean of relating this
to the type of leaf, for example? And, if this is true, is it also
true that the typical "household plant" lights that one sees in local
stores are almost as effective as natural sunlight? If the answer is
"yes," or "perhaps," then would it be normal to think that one should
use such a light during the normal "rise and fall" of the sun
throughout the day, for example, during those days and weeks of
little
to no sunlight for various reasons.

Thanks,

Mark

You might Google, question dealing, specifically, with the general
"household plant". It's true you know about JSB. His hovercraft IS full
of eels. What are you wearing for Beltane's Day? Don't over dress;-)
--

Billy

Bush & Cheney, Behind
Barshttp://www.gallup.com/poll/102577/Half-Strongly-
Disapprove-Bush-Job-Performance.aspx- Hide quoted text -

- Show quoted text -


First thing, I suggest is that you get a brain or use the one that came
with the original equipment.

Secondly, Dogmatic: Characterized by an authoritative, arrogant
assertion of unproved or unprovable principles. See Synonyms at
dictatorial. [Late Latin dogmaticus, from Greek dogmatikos, from dogma,
dogmat-, belief. See DOGMA.]

Shirley, you must have confused me with "Doo". From 2 stolen elections,
to fabricating a war for fun and profit, to overthrowing laws about
torture, to overthrowing the 800 year tradition of habeas corpus,
branding Bush as a fascist thug is far from dogmatic.

Still with me? You didn't google "degree of light warranted by general
household plant" did you? Why did you ask a question if you weren't
prepared to accept the answer? If you had googled "degree of light
warranted by general household plant", you may have noticed that it
generated 67,500 responses. What would that have suggested to you?

Then the question that you actually posed, "would it be normal to think
that one should use such a light (almost as effective as natural
sunlight) during the normal "rise and fall" of the sun throughout the
day, . . . " was predicated on three premises that were untested, which
would explain the 67,500 google responses.

Most posters to "wrecked gardens" enjoy aiding fellow gardeners but we
really aren't prepared for life support. I'm overjoyed that during this
season of good will, that you received some responses to your question
even though it seems that the responders put in more effort than you did.

(1) Google it.
(2) Ask one question at a time.

As for JoeSpareBedroom and his hover craft full of eels, I have seen it
myself, through the eyes of faith.

Lastly, during Beltane you don't want any untimely wardrobe
entanglements.

--
Bush Behind Bars

Billy
http://angryarab.blogspot.com/



  #10   Report Post  
Old 20-12-2007, 07:38 PM posted to rec.gardens
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First recorded activity by GardenBanter: Aug 2007
Posts: 2,265
Default Sunlight and Plants

In article ,
"Don Staples" wrote:

Billy, still ingesting to much of his home product.


Define "too much".



"Billy" wrote in message
...
In article
,
Mea505 wrote:

I apologize, Billy; although I agree with your dogmatic views about
the present administration, I don't get the link between what I typed
and then how you chose to respond. Perhaps there is something like an
"inside joke" going on within the group?

Mark


On Dec 20, 12:52 am, Billy wrote:
In article
,





Mea505 wrote:
Hello all:

I am a relatively new member of this group, and I looked over the
most
recent messages before I decided to write this post. I have a
question
dealing, specifically, with the general 'household plant," and the
degree of sunlight that is warranted for such plants.

Question: Is there a means by which one can identify those plants
that
require varying degrees of sunlight? Is there a mean of relating this
to the type of leaf, for example? And, if this is true, is it also
true that the typical "household plant" lights that one sees in local
stores are almost as effective as natural sunlight? If the answer is
"yes," or "perhaps," then would it be normal to think that one should
use such a light during the normal "rise and fall" of the sun
throughout the day, for example, during those days and weeks of
little
to no sunlight for various reasons.

Thanks,

Mark

You might Google, question dealing, specifically, with the general
"household plant". It's true you know about JSB. His hovercraft IS full
of eels. What are you wearing for Beltane's Day? Don't over dress;-)
--

Billy

Bush & Cheney, Behind
Barshttp://www.gallup.com/poll/102577/Half-Strongly-
Disapprove-Bush-Job-Performance.aspx- Hide quoted text -

- Show quoted text -


First thing, I suggest is that you get a brain or use the one that came
with the original equipment.

Secondly, Dogmatic: Characterized by an authoritative, arrogant
assertion of unproved or unprovable principles. See Synonyms at
dictatorial. [Late Latin dogmaticus, from Greek dogmatikos, from dogma,
dogmat-, belief. See DOGMA.]

Shirley, you must have confused me with "Doo". From 2 stolen elections,
to fabricating a war for fun and profit, to overthrowing laws about
torture, to overthrowing the 800 year tradition of habeas corpus,
branding Bush as a fascist thug is far from dogmatic.

Still with me? You didn't google "degree of light warranted by general
household plant" did you? Why did you ask a question if you weren't
prepared to accept the answer? If you had googled "degree of light
warranted by general household plant", you may have noticed that it
generated 67,500 responses. What would that have suggested to you?

Then the question that you actually posed, "would it be normal to think
that one should use such a light (almost as effective as natural
sunlight) during the normal "rise and fall" of the sun throughout the
day, . . . " was predicated on three premises that were untested, which
would explain the 67,500 google responses.

Most posters to "wrecked gardens" enjoy aiding fellow gardeners but we
really aren't prepared for life support. I'm overjoyed that during this
season of good will, that you received some responses to your question
even though it seems that the responders put in more effort than you did.

(1) Google it.
(2) Ask one question at a time.

As for JoeSpareBedroom and his hover craft full of eels, I have seen it
myself, through the eyes of faith.

Lastly, during Beltane you don't want any untimely wardrobe
entanglements.

--
Bush Behind Bars

Billy
http://angryarab.blogspot.com/

--

Billy

Bush & Cheney, Behind Bars
http://www.gallup.com/poll/102577/Half-Strongly-
Disapprove-Bush-Job-Performance.aspx



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Old 20-12-2007, 10:30 PM posted to rec.gardens
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Posts: 1,096
Default Sunlight and Plants

In article
,
Billy wrote:

In article ,
"Don Staples" wrote:

Billy, still ingesting to much of his home product.


Define "too much".


What does not kill me, makes me stronger.
Friedrich Nietzsche, Twilight of the Idols, 1888
German philosopher (1844 - 1900)

Question: Is there a means by which one can identify those plants
that
require varying degrees of sunlight? Is there a mean of relating this
to the type of leaf, for example? And, if this is true, is it also
true that the typical "household plant" lights that one sees in local
stores are almost as effective as natural sunlight? If the answer is
"yes," or "perhaps," then would it be normal to think that one should
use such a light during the normal "rise and fall" of the sun
throughout the day, for example, during those days and weeks of
little
to no sunlight for various reasons.

Thanks,

Mark


Sure there is try it hands on. Mark you live in your head more than I
be careful. Get your hands dirty and kill lots of plants before you
find a death rate you can live with.

Merry Christmas to all..and Soltice is soon.

Silent Night Rotary Connection Peace

O Yea

Bill


Bill

--
Garden in shade zone 5 S Jersey USA
"Energy is the only life and is from the Body and Reason is the bound
or outward circumference of Energy.
Energy is Eternal Delight"
William Blake
  #12   Report Post  
Old 21-12-2007, 02:17 AM posted to rec.gardens
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Posts: 2,265
Default Sunlight and Plants

In article
,
Bill wrote:

Merry Christmas to all..and Soltice is soon.

Silent Night Rotary Connection Peace

O Yea


Yeah, about 29 hours more and the days will start growing again and,
after a speed bump called "winter", blessed spring, and rebirth.
Hallelujah, brothers and sisters, hallelujah. A new year is coming up,
on the horizon, filled with fresh starts and new beginnings, not to
mention embarrassing moments that we will never live down:-o

O Tannenbaum, O Tannenbaum, wie treu sind deine blatter. usw.

I'm startin' to feel the spirit move me now.
--

Billy

Bush & Cheney, Behind Bars
http://www.gallup.com/poll/102577/Half-Strongly-
Disapprove-Bush-Job-Performance.aspx

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Old 21-12-2007, 05:59 AM posted to rec.gardens
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First recorded activity by GardenBanter: Jul 2006
Posts: 438
Default Sunlight and Plants


"mor" wrote in message
...

Depending on the house hold plant you have . unless of crouse is very
special. house hold plant donot require alot of light.


It depends on the plant and what you mean by "a lot". I have seen many more
house plants that were not their best due to too little light than too much.

the only problem would be with watering.


Sorry I disagree. Watering house plants is one aspect of their culture that
is fairly easily controlled.

l have notices that during summer my plants tend
to weather off. leafs turning burn.


What sort of plants? What is your summer like? Do you have air-conditioning?
This could be not enough humidity, in their natural environment many house
plants like much more humidity in the air than humans find comfortable,
especially when it is hot.

l tend to keep them in the shade.
where do you leave?


I live in eastern Australia. The summer is very hot and often humid. The
winter is cool but does not snow.

David



  #14   Report Post  
Old 21-12-2007, 01:51 PM posted to rec.gardens
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First recorded activity by GardenBanter: Jul 2006
Posts: 86
Default Sunlight and Plants

Mea505 wrote:

I don't think the timing makes any difference.


That may be an answer for some sorts of plants but timing is certainly
critical for many. Many plants will not even flower unless the timing
is right.

Just ponder why apples can not be grown in the Tropics. It is not even
the total number of daylight hours. They must rise and fall in the
proper sequence.

Sort of like chickens that stop laying eggs when the days get shorter.
Keep a small lite on in the coop till 9pm and they will lay all winter.

js



--
PHOTO OF THE WEEK: http://schmidling.com/pow.htm
Astronomy, Beer, Cheese, Fiber,Gems, Sausage,Silver http://schmidling.com
  #15   Report Post  
Old 22-12-2007, 02:18 AM posted to rec.gardens
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Posts: 142
Default Sunlight and Plants

On Dec 19, 11:30 pm, Mea505 wrote:
Hello all:

I am a relatively new member of this group, and I looked over the most
recent messages before I decided to write this post. I have a question
dealing, specifically, with the general 'household plant," and the
degree of sunlight that is warranted for such plants.

Question: Is there a means by which one can identify those plants that
require varying degrees of sunlight? Is there a mean of relating this
to the type of leaf, for example? And, if this is true, is it also
true that the typical "household plant" lights that one sees in local
stores are almost as effective as natural sunlight?


Incandescent grow lamps are overpriced and underpowered, but do
output a pleasing to the human eye spectrum, plus lots of heat,
possibly too much for a plant's health. Fluorescents are better,
high intensity discharge halides or high pressure sodium better
still, though the latter two lamps require specialized ballasts
and fixtures.

26 watt (100 watt equivalent) cool white compact fluorescents
are cheap and work great for small plants, with no special hardware
needed; I have a test impatiens that's blooming heavily under a desk
lamp with a 16 watt cool white CFL bulb (60 watt equivalent).

If the answer is
"yes," or "perhaps," then would it be normal to think that one should
use such a light during the normal "rise and fall" of the sun
throughout the day, for example, during those days and weeks of little
to no sunlight for various reasons.


Starting point would be anywhere between 12 and 18 hours on
for every 24 hour "day."
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