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  #1   Report Post  
Old 03-10-2004, 01:45 PM
kenty ;-\)
 
Posts: n/a
Default temperature & timing

Hi Everyone,With autumn/winter upon us,my first growing in the greenhouse I
have a question about how you control temp with the day or just a set amount
of temp(8 hours a day, for example) regardless of daylong.
--
Thanks Keith,England,UK.


  #2   Report Post  
Old 03-10-2004, 01:48 PM
kenty ;-\)
 
Posts: n/a
Default

Hi Everyone,With autumn/winter upon us,my first growing in the greenhouse I
have a question about how you control temp with the daylength or just a set
amount
of temp(8 hours a day, for example) regardless of daylength.
--
Thanks Keith,England,UK

--
Thanks Keith,England,UK.
"kenty ;-)" wrote in message
news:1096803384.9kaoQ80nf6crr+oLz+bazg@teranews...
Hi Everyone,With autumn/winter upon us,my first growing in the greenhouse

I
have a question about how you control temp with the day or just a set

amount
of temp(8 hours a day, for example) regardless of daylong.
--
Thanks Keith,England,UK.




  #3   Report Post  
Old 03-10-2004, 07:17 PM
Ray
 
Posts: n/a
Default

I prescribe to the concept that one should let the heat in the greenhouse
increase only by solar gain. If you raise the temperature on gray, cloudy
days, you will likely end up with leggy plants that aren't very sturdy, as
they try to grow - stimulated by the heat - without the ability to conduct
much photosynthesis.

Set you preferred minimum nighttime temp and let nature take its course.
--

Ray Barkalow - First Rays Orchids - www.firstrays.com
Plants, Supplies, Books, Artwork, and Lots of Free Info!
..
"kenty ;-)" wrote in message
news:1096803384.9kaoQ80nf6crr+oLz+bazg@teranews...
Hi Everyone,With autumn/winter upon us,my first growing in the greenhouse
I
have a question about how you control temp with the day or just a set
amount
of temp(8 hours a day, for example) regardless of daylong.
--
Thanks Keith,England,UK.




  #4   Report Post  
Old 03-10-2004, 08:31 PM
Kenni Judd
 
Posts: n/a
Default

All we try to do is knock off the extremes -- misters to keep the temp below
95F in summer, heat to 55F in winter. In between these extremes, whatever
the temp happens to be is what it is.

--
Kenni Judd
Juno Beach Orchids
http://www.jborchids.com
"Ray" wrote in message
...
I prescribe to the concept that one should let the heat in the greenhouse
increase only by solar gain. If you raise the temperature on gray, cloudy
days, you will likely end up with leggy plants that aren't very sturdy, as
they try to grow - stimulated by the heat - without the ability to conduct
much photosynthesis.

Set you preferred minimum nighttime temp and let nature take its course.
--

Ray Barkalow - First Rays Orchids - www.firstrays.com
Plants, Supplies, Books, Artwork, and Lots of Free Info!
.
"kenty ;-)" wrote in message
news:1096803384.9kaoQ80nf6crr+oLz+bazg@teranews...
Hi Everyone,With autumn/winter upon us,my first growing in the

greenhouse
I
have a question about how you control temp with the day or just a set
amount
of temp(8 hours a day, for example) regardless of daylong.
--
Thanks Keith,England,UK.






  #5   Report Post  
Old 03-10-2004, 10:30 PM
Susan Erickson
 
Posts: n/a
Default

On Sun, 3 Oct 2004 14:31:42 -0400, "Kenni Judd"
wrote:

All we try to do is knock off the extremes -- misters to keep the temp below
95F in summer, heat to 55F in winter. In between these extremes, whatever
the temp happens to be is what it is.


We raise it to 65 during the day and let solar gain take it from
there. Here in Co it is not unusual to have the roof vent raise
in Feb. because it has gotten to 80 in the afternoon. OF course
the next day it may be gray and not climb over 70. So I let the
excess heat out and hope enough stays to temper the heating bill.

SuE
http://orchids.legolas.org/gallery/albums.php


  #6   Report Post  
Old 04-10-2004, 09:08 PM
kenty ;-\)
 
Posts: n/a
Default

Thanks for the advise,i grow intermediate,what are your conditions for the
advise given?

--
Thanks Keith,England,UK.
"Susan Erickson" wrote in message
...
On Sun, 3 Oct 2004 14:31:42 -0400, "Kenni Judd"
wrote:

All we try to do is knock off the extremes -- misters to keep the temp

below
95F in summer, heat to 55F in winter. In between these extremes,

whatever
the temp happens to be is what it is.


We raise it to 65 during the day and let solar gain take it from
there. Here in Co it is not unusual to have the roof vent raise
in Feb. because it has gotten to 80 in the afternoon. OF course
the next day it may be gray and not climb over 70. So I let the
excess heat out and hope enough stays to temper the heating bill.

SuE
http://orchids.legolas.org/gallery/albums.php



  #7   Report Post  
Old 04-10-2004, 09:14 PM
kenty ;-\)
 
Posts: n/a
Default

Am I worrying to much about trying to achieve the day/night temp
difference,do you find then that in greenhouse culture there isn't prolonged
temps that stay the same,i.e. 55f on cloudy days which surely if continued
at this temp will do the plants harm?I suppose everyone's conditions are
different so it is a case of trial and error.I am only flapping because it
is my first year in the greenhouse and don't want to kill the plants.It will
be a good learning curve through the months to come!

--
Thanks Keith,England,UK.
"kenty ;-)" wrote in message
news:1096916367.xNZxdv1ek7mhKpcVSch/5A@teranews...
Thanks for the advise,i grow intermediate,what are your conditions for the
advise given?

--
Thanks Keith,England,UK.
"Susan Erickson" wrote in message
...
On Sun, 3 Oct 2004 14:31:42 -0400, "Kenni Judd"
wrote:

All we try to do is knock off the extremes -- misters to keep the temp

below
95F in summer, heat to 55F in winter. In between these extremes,

whatever
the temp happens to be is what it is.


We raise it to 65 during the day and let solar gain take it from
there. Here in Co it is not unusual to have the roof vent raise
in Feb. because it has gotten to 80 in the afternoon. OF course
the next day it may be gray and not climb over 70. So I let the
excess heat out and hope enough stays to temper the heating bill.

SuE
http://orchids.legolas.org/gallery/albums.php





  #8   Report Post  
Old 04-10-2004, 09:37 PM
wendy7
 
Posts: n/a
Default

Hi Keith, I grow in a g/h in S.Calif & have my heater set to go on
at 58 degrees. If there are plants that require a chill, they don't get
it & or don't grow/bloom. I grow cyms outside.
Were you growing indoors under lights before the G/h?
--
Cheers Wendy

Remove PETERPAN for email reply

kenty ;-) wrote:
Am I worrying to much about trying to achieve the day/night temp
difference,do you find then that in greenhouse culture there isn't
prolonged temps that stay the same,i.e. 55f on cloudy days which
surely if continued at this temp will do the plants harm?I suppose
everyone's conditions are different so it is a case of trial and
error.I am only flapping because it is my first year in the
greenhouse and don't want to kill the plants.It will be a good
learning curve through the months to come!

Thanks for the advise,i grow intermediate,what are your conditions
for the advise given?

--
Thanks Keith,England,UK.
"Susan Erickson" wrote in message
...
On Sun, 3 Oct 2004 14:31:42 -0400, "Kenni Judd"
wrote:

All we try to do is knock off the extremes -- misters to keep the
temp below 95F in summer, heat to 55F in winter. In between these
extremes, whatever the temp happens to be is what it is.

We raise it to 65 during the day and let solar gain take it from
there. Here in Co it is not unusual to have the roof vent raise
in Feb. because it has gotten to 80 in the afternoon. OF course
the next day it may be gray and not climb over 70. So I let the
excess heat out and hope enough stays to temper the heating bill.

SuE
http://orchids.legolas.org/gallery/albums.php



  #9   Report Post  
Old 04-10-2004, 09:46 PM
kenty ;-\)
 
Posts: n/a
Default

Hi Wendy,They only got natural light before,growing in the home,were ever I
could get them :-).what do you grow to that temp?So you don't raise the temp
in the day without the sun help?

--
Thanks Keith,England,UK.
"wendy7" wrote in message
news:VDh8d.122337$9Y5.65461@fed1read02...
Hi Keith, I grow in a g/h in S.Calif & have my heater set to go on
at 58 degrees. If there are plants that require a chill, they don't get
it & or don't grow/bloom. I grow cyms outside.
Were you growing indoors under lights before the G/h?
--
Cheers Wendy

Remove PETERPAN for email reply

kenty ;-) wrote:
Am I worrying to much about trying to achieve the day/night temp
difference,do you find then that in greenhouse culture there isn't
prolonged temps that stay the same,i.e. 55f on cloudy days which
surely if continued at this temp will do the plants harm?I suppose
everyone's conditions are different so it is a case of trial and
error.I am only flapping because it is my first year in the
greenhouse and don't want to kill the plants.It will be a good
learning curve through the months to come!

Thanks for the advise,i grow intermediate,what are your conditions
for the advise given?

--
Thanks Keith,England,UK.
"Susan Erickson" wrote in message
...
On Sun, 3 Oct 2004 14:31:42 -0400, "Kenni Judd"
wrote:

All we try to do is knock off the extremes -- misters to keep the
temp below 95F in summer, heat to 55F in winter. In between these
extremes, whatever the temp happens to be is what it is.

We raise it to 65 during the day and let solar gain take it from
there. Here in Co it is not unusual to have the roof vent raise
in Feb. because it has gotten to 80 in the afternoon. OF course
the next day it may be gray and not climb over 70. So I let the
excess heat out and hope enough stays to temper the heating bill.

SuE
http://orchids.legolas.org/gallery/albums.php





  #10   Report Post  
Old 04-10-2004, 10:03 PM
wendy7
 
Posts: n/a
Default

The heater is run with a thermostat so the heater will turn on any time
it gets colder.
I grow just about everything Intermediate.
Oh I have some heating cables for my Phals but I cant grow them too well?
What kind of heating system do you have in your g/h Keith?
It gets really cold in your neck of the woods right?
--
Cheers Wendy

Remove PETERPAN for email reply

kenty ;-) wrote:
Hi Wendy,They only got natural light before,growing in the home,were
ever I could get them :-).what do you grow to that temp?So you don't
raise the temp in the day without the sun help?

Hi Keith, I grow in a g/h in S.Calif & have my heater set to go on
at 58 degrees. If there are plants that require a chill, they don't
get it & or don't grow/bloom. I grow cyms outside.
Were you growing indoors under lights before the G/h?
--
Cheers Wendy

Remove PETERPAN for email reply

kenty ;-) wrote:
Am I worrying to much about trying to achieve the day/night temp
difference,do you find then that in greenhouse culture there isn't
prolonged temps that stay the same,i.e. 55f on cloudy days which
surely if continued at this temp will do the plants harm?I suppose
everyone's conditions are different so it is a case of trial and
error.I am only flapping because it is my first year in the
greenhouse and don't want to kill the plants.It will be a good
learning curve through the months to come!

Thanks for the advise,i grow intermediate,what are your conditions
for the advise given?

--
Thanks Keith,England,UK.
"Susan Erickson" wrote in message
...
On Sun, 3 Oct 2004 14:31:42 -0400, "Kenni Judd"
wrote:

All we try to do is knock off the extremes -- misters to keep the
temp below 95F in summer, heat to 55F in winter. In between
these extremes, whatever the temp happens to be is what it is.

We raise it to 65 during the day and let solar gain take it from
there. Here in Co it is not unusual to have the roof vent raise
in Feb. because it has gotten to 80 in the afternoon. OF course
the next day it may be gray and not climb over 70. So I let the
excess heat out and hope enough stays to temper the heating bill.

SuE
http://orchids.legolas.org/gallery/albums.php





  #11   Report Post  
Old 04-10-2004, 10:03 PM
wendy7
 
Posts: n/a
Default

The heater is run with a thermostat so the heater will turn on any time
it gets colder.
I grow just about everything Intermediate.
Oh I have some heating cables for my Phals but I cant grow them too well?
What kind of heating system do you have in your g/h Keith?
It gets really cold in your neck of the woods right?
--
Cheers Wendy

Remove PETERPAN for email reply

kenty ;-) wrote:
Hi Wendy,They only got natural light before,growing in the home,were
ever I could get them :-).what do you grow to that temp?So you don't
raise the temp in the day without the sun help?

Hi Keith, I grow in a g/h in S.Calif & have my heater set to go on
at 58 degrees. If there are plants that require a chill, they don't
get it & or don't grow/bloom. I grow cyms outside.
Were you growing indoors under lights before the G/h?
--
Cheers Wendy

Remove PETERPAN for email reply

kenty ;-) wrote:
Am I worrying to much about trying to achieve the day/night temp
difference,do you find then that in greenhouse culture there isn't
prolonged temps that stay the same,i.e. 55f on cloudy days which
surely if continued at this temp will do the plants harm?I suppose
everyone's conditions are different so it is a case of trial and
error.I am only flapping because it is my first year in the
greenhouse and don't want to kill the plants.It will be a good
learning curve through the months to come!

Thanks for the advise,i grow intermediate,what are your conditions
for the advise given?

--
Thanks Keith,England,UK.
"Susan Erickson" wrote in message
...
On Sun, 3 Oct 2004 14:31:42 -0400, "Kenni Judd"
wrote:

All we try to do is knock off the extremes -- misters to keep the
temp below 95F in summer, heat to 55F in winter. In between
these extremes, whatever the temp happens to be is what it is.

We raise it to 65 during the day and let solar gain take it from
there. Here in Co it is not unusual to have the roof vent raise
in Feb. because it has gotten to 80 in the afternoon. OF course
the next day it may be gray and not climb over 70. So I let the
excess heat out and hope enough stays to temper the heating bill.

SuE
http://orchids.legolas.org/gallery/albums.php



  #12   Report Post  
Old 04-10-2004, 10:03 PM
wendy7
 
Posts: n/a
Default

The heater is run with a thermostat so the heater will turn on any time
it gets colder.
I grow just about everything Intermediate.
Oh I have some heating cables for my Phals but I cant grow them too well?
What kind of heating system do you have in your g/h Keith?
It gets really cold in your neck of the woods right?
--
Cheers Wendy

Remove PETERPAN for email reply

kenty ;-) wrote:
Hi Wendy,They only got natural light before,growing in the home,were
ever I could get them :-).what do you grow to that temp?So you don't
raise the temp in the day without the sun help?

Hi Keith, I grow in a g/h in S.Calif & have my heater set to go on
at 58 degrees. If there are plants that require a chill, they don't
get it & or don't grow/bloom. I grow cyms outside.
Were you growing indoors under lights before the G/h?
--
Cheers Wendy

Remove PETERPAN for email reply

kenty ;-) wrote:
Am I worrying to much about trying to achieve the day/night temp
difference,do you find then that in greenhouse culture there isn't
prolonged temps that stay the same,i.e. 55f on cloudy days which
surely if continued at this temp will do the plants harm?I suppose
everyone's conditions are different so it is a case of trial and
error.I am only flapping because it is my first year in the
greenhouse and don't want to kill the plants.It will be a good
learning curve through the months to come!

Thanks for the advise,i grow intermediate,what are your conditions
for the advise given?

--
Thanks Keith,England,UK.
"Susan Erickson" wrote in message
...
On Sun, 3 Oct 2004 14:31:42 -0400, "Kenni Judd"
wrote:

All we try to do is knock off the extremes -- misters to keep the
temp below 95F in summer, heat to 55F in winter. In between
these extremes, whatever the temp happens to be is what it is.

We raise it to 65 during the day and let solar gain take it from
there. Here in Co it is not unusual to have the roof vent raise
in Feb. because it has gotten to 80 in the afternoon. OF course
the next day it may be gray and not climb over 70. So I let the
excess heat out and hope enough stays to temper the heating bill.

SuE
http://orchids.legolas.org/gallery/albums.php



  #13   Report Post  
Old 04-10-2004, 11:30 PM
kenty ;-\)
 
Posts: n/a
Default

I have a electric heater run through a thermostat controller & probe which
is very accurate,I have two of this set-up one for day & one for night,both
on timers so one set-up takes over from the other,it is automatically done.I
just have to initially set the parameters I want,the night is set to 59f/15c
and day has been at 71f/22c,but today was really sunny in the after noon so
the temp got in the 80`s.After input I have received off you guys I am going
to lower the day temp to 66f/19c?What do you think.I live in Robin Hood
country,that being Nottingham,England,UK.It can get quite cold here(zone
8)but really not that bad!My greenhouse is only a measly 10x8,but we all
have to start somewhere.
--
Thanks Keith,England,UK.
"wendy7" wrote in message
news:x0i8d.122345$9Y5.122048@fed1read02...
The heater is run with a thermostat so the heater will turn on any time
it gets colder.
I grow just about everything Intermediate.
Oh I have some heating cables for my Phals but I cant grow them too well?
What kind of heating system do you have in your g/h Keith?
It gets really cold in your neck of the woods right?
--
Cheers Wendy

Remove PETERPAN for email reply

kenty ;-) wrote:
Hi Wendy,They only got natural light before,growing in the home,were
ever I could get them :-).what do you grow to that temp?So you don't
raise the temp in the day without the sun help?

Hi Keith, I grow in a g/h in S.Calif & have my heater set to go on
at 58 degrees. If there are plants that require a chill, they don't
get it & or don't grow/bloom. I grow cyms outside.
Were you growing indoors under lights before the G/h?
--
Cheers Wendy

Remove PETERPAN for email reply

kenty ;-) wrote:
Am I worrying to much about trying to achieve the day/night temp
difference,do you find then that in greenhouse culture there isn't
prolonged temps that stay the same,i.e. 55f on cloudy days which
surely if continued at this temp will do the plants harm?I suppose
everyone's conditions are different so it is a case of trial and
error.I am only flapping because it is my first year in the
greenhouse and don't want to kill the plants.It will be a good
learning curve through the months to come!

Thanks for the advise,i grow intermediate,what are your conditions
for the advise given?

--
Thanks Keith,England,UK.
"Susan Erickson" wrote in message
...
On Sun, 3 Oct 2004 14:31:42 -0400, "Kenni Judd"
wrote:

All we try to do is knock off the extremes -- misters to keep the
temp below 95F in summer, heat to 55F in winter. In between
these extremes, whatever the temp happens to be is what it is.

We raise it to 65 during the day and let solar gain take it from
there. Here in Co it is not unusual to have the roof vent raise
in Feb. because it has gotten to 80 in the afternoon. OF course
the next day it may be gray and not climb over 70. So I let the
excess heat out and hope enough stays to temper the heating bill.

SuE
http://orchids.legolas.org/gallery/albums.php





  #14   Report Post  
Old 05-10-2004, 05:21 AM
Steve
 
Posts: n/a
Default

Keith,
I've been following this thread and I have an opinion, even though I
don't have a greenhouse.
Since you already have your heater system set up for day and night
temperatures, I think you should aim for a comfortable 10 degree (f)
difference between day and night. If you want to keep the night
temperatures no lower than 59f, then set the day temp for 69f. Now, I
don't think it would be necessary, or even desirable to keep the
temperature that warm all day (unless it is up there due to sunshine). I
would set that timer to be on from 11 AM to 3 PM.
I would either do away with the timer for the 59 degree setting or, if
it is easier, set it for the 20 hours of the day that remain.
Hopefully, you will have many days where greenhouse warms beyond 69
degrees before 11 AM and the higher temperature thermostat will not even
have to kick in.

Steve (wishing for zone 8 but more like 3)

kenty ;-) wrote:
I have a electric heater run through a thermostat controller & probe which
is very accurate,I have two of this set-up one for day & one for night,both
on timers so one set-up takes over from the other,it is automatically done.I
just have to initially set the parameters I want,the night is set to 59f/15c
and day has been at 71f/22c,but today was really sunny in the after noon so
the temp got in the 80`s.After input I have received off you guys I am going
to lower the day temp to 66f/19c?What do you think.I live in Robin Hood
country,that being Nottingham,England,UK.It can get quite cold here(zone
8)but really not that bad!My greenhouse is only a measly 10x8,but we all
have to start somewhere.

  #15   Report Post  
Old 05-10-2004, 11:52 AM
Ray
 
Posts: n/a
Default

Actually, I think it's better to not artificially raise the daytime
temperature, but to allow it to happen by solar gain instead.

The reason being that plants tend to grow in response to warm temperature
and higher light intensity. If the two coincide, that is, when the solar
flux raises the temperature in the greenhouse, the plant grows normally.
If, on the other hand, the temperature is raised when there is no solar flux
to speak of - gray, cloudy days - one will tend to end up with leggy, "soft"
plants that might not be able to even stand up properly (in extreme cases).

My advice is to set your heating for maintaining a decent minimum
temperature, and let it go at that. It's better for the plants and less
expensive, too!

--

Ray Barkalow - First Rays Orchids - www.firstrays.com
Plants, Supplies, Books, Artwork, and Lots of Free Info!
..
"Steve" wrote in message
...
Keith,
I've been following this thread and I have an opinion, even though I don't
have a greenhouse.
Since you already have your heater system set up for day and night
temperatures, I think you should aim for a comfortable 10 degree (f)
difference between day and night. If you want to keep the night
temperatures no lower than 59f, then set the day temp for 69f. Now, I
don't think it would be necessary, or even desirable to keep the
temperature that warm all day (unless it is up there due to sunshine). I
would set that timer to be on from 11 AM to 3 PM.
I would either do away with the timer for the 59 degree setting or, if it
is easier, set it for the 20 hours of the day that remain.
Hopefully, you will have many days where greenhouse warms beyond 69
degrees before 11 AM and the higher temperature thermostat will not even
have to kick in.

Steve (wishing for zone 8 but more like 3)

kenty ;-) wrote:
I have a electric heater run through a thermostat controller & probe
which
is very accurate,I have two of this set-up one for day & one for
night,both
on timers so one set-up takes over from the other,it is automatically
done.I
just have to initially set the parameters I want,the night is set to
59f/15c
and day has been at 71f/22c,but today was really sunny in the after noon
so
the temp got in the 80`s.After input I have received off you guys I am
going
to lower the day temp to 66f/19c?What do you think.I live in Robin Hood
country,that being Nottingham,England,UK.It can get quite cold here(zone
8)but really not that bad!My greenhouse is only a measly 10x8,but we all
have to start somewhere.



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