Once upon a time on usenet T wrote:
On 03/10/2015 05:44 PM, ~misfit~ wrote:
This is actually information I am relaying from a local
CSA greenhouse. Their incredible organic tomatoes
were in wet, humid, drained green houses. And EVERY
tomato was incredible: both heirlooms and hybrids
alike.
How do they control or prevent blight / fungus / rot?

Do you have tips for her? I hate it that she can't get a
decent tomato. As far as my experience goes, it is all
about the soil.

Going by the above you know almost everything there is to know about
them. You can't help?

Hi Misfit,

I am relaying what I saw and was told at a successful
green house.

Here is good link for you:

Growing Hydroponic Gardening Tomatoes
http://www.mightygrowhydro.com/growi...opinically.htm

"For tomatoes, an ideal humidity level in the greenhouse
needs to be between 65 and 70 percent. Temperatures must
not vary too much, although tomatoes flourish when the
night time temperature is ten degrees below that of the
daytime Ideally, temperatures really should be seventy-three
degrees during the day and sixty-three during the night.

This is what I observed at the successful greenhouse.

Oh, you're talking about a hydroponic system. I have done some hydroponic /
aeroponic growing in the past with humidity and temperature control and it's
a whole different ball game to organic soil growing. They have very little
in common.

In soil the humidity is much higher closer to the ground whereas in a
hydroponic greenhouse it's fairly uniform top to bottom. It really is apples
and oranges. A hydroponic greenhouse is a semi-closed system where you have
control over light levels, temperature and humidity. Consequently you can
walk that fine line between perfect and too high humidity knowing that it's
not going to go too high, and that it's uniform.

Maybe somewhere in the link there will be something for you
about the "blight / fungus / rot" problem you were complaining about.

I am hope at some point Songbird will chime in. He has about
100 times my knowledge. Maybe he knows something about
your "blight / fungus / rot" problem too.

The biggest problem this year for me was that 'spring' was mostly very wet
and humid. We had maybe two weeks of 'yay it's spring' weather then six
weeks of wet humid and colder than usual. I had to pull my first planting of
tomatoes out as they just wet black and rotted (at 1.5m tall no less). So
you can perhaps see why I don't agree that tomatoes like it very humid. (Ask
anyone who grows tomatoes in the UK about what it's like trying to grow them
in a climate that's too wet for them. They have to rotate the areas they
grow them in religiously or they get bad blight early on in the season from
the spores of last autumn.)

Then, a few days before Xmas, when I'd normally be getting into the main
harvest the weather dried up - too much! It got very hot and dry.
Consequently I've only just started getting a decent number or ripe tomatoes
now and the days are getting much shorter already and the nights colder.
--
Shaun.

"Humans will have advanced a long, long, way when religious belief has a
cozy little classification in the DSM."
David Melville (in r.a.s.f1)