Quote:
Originally Posted by sjamesNorway
Fusion_power wrote this in a thread about the effect of temperatures-
"92°F = This is the temp at which pollen starts clumping and blossoms begin to drop.
70°F (21C) to 92°F (33C) = This is the goldilocks zone. Tomatoes grow prolifically, flowers set readily, plants need maximum fertility in the soil. The high end of this range is optimum for spread of several foliage diseases."
It seldom gets over 92°F in the greenhouse here for several days, and it always cools off at night. In my experience some varieties tolerate heat better than others, and heat tolerance is often mentioned in descriptions of some varieties. I assume this is due to genetic variation in the susceptibility over time of the pollen and flowers.
Steve
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Steve,you do know that Darrell lives and gardens in Alabama where it is both Hot and Humid.
If it were me I wouldn't compare what he sees with what you experience in Norway,either outside or in a greenhouse..
Especially when he says pollen clumping come first, at least for him.
Carolyn