I'm growing outdoors from seed, and my plants' leaves were curling under with high humidity. However, after a hot week week before last, and a temperate week last week (HIGH f'ing wind, too!), they got watered last night with "soft" nutes (a non-urea orchid food) and then it started raining. Been raining all morning for sure. They're not catching all the rainfall, but I expected leaf curl and there is none. Go figure.