Question: What is the best way of cooling my greenhouse?

Answer: Evaporative cooling works fairly well, especially in Central, North and West Texas, where humidities are lowest. Put the cooler on the south end, so the prevailing winds in the summer can blow through it and into your greenhouse. You may prefer simply to take the covering off part of your greenhouse when it’s really hot, so the air can blow through it. Have gravel beneath the benches, and keep the gravel moist to help cool the greenhouse.