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Having a greenhouse really is fantastic. Im sure you won’t regret building one.
Yes I had huge issues with cottony cushion scale, mealybugs, and spider mites in my greenhouse. Repeat, strong doses of imidacloprid finally got rid of the CCS, and I think the mealybugs (crossing fingers), but I have yet to find anything to eradicate spider mites only suppress them. When I move my container trees out of the greenhouse their insect problems mostly go away. Rain & predators, I assume.
In order of efficiency...- Natural air convection is the best (roof vents + side vents), openable roof, rolled up sides, etc.- Mechanical venting next (fans)- Evaporative cooling (foggers, evap pads, misters, sprinkler running inside)- And actual air conditioning would be he most expensive way I guess.You can use shade cloth to reduce cooling needs.
What are people's preferred or most optimal way to cool down a greenhouse? I'm about to rebuild a 55 x 70 AgraTech Solar 18 with ridge vents and kind of am not too sure.