I’m with
@flowerbug and was wondering which one of us got this wrong? When we have period of rainy, drippy weather that last 3-5 or more days at a time it gets quite wet in the greenhouse. When that happens the Powdery and Downy mildews ”express themselves” in a bigger way. The de-hi is working to keep the Relative Humidity DOWN to 65%, otherwise we would be overrun with “fungal pathogens”
Yes, it makes heat and that’s a good thing because it’s helping save me fuel oil money by helping out the toyo.
I been to Bama, Georgia, N&S Carolina and grew up in Miami as a kid and understand your humidity. This isn’t like that.
When we have “a drippy spell” the plants suffer as much from light depravation as anything else, sorta like in the middle of one of your hurricanes without the wind and much colder.
Here’s a picture of my one tomato plant and “a portion” of what she produced this year. This is only possible because of the greenhouse and good moisture control.
for some perspective, that plant is 12 ft wide, 12 ft tall and 8 ft thick from front to back.