What is a humidity tray and how can I make one?
Humidity trays are any kind of a container that has gravel and water in them. You can use shallow bowls, kitty litter pans, plant saucers, cake pans, etc. Fill your container about half full with pea gravel or colored aquarium gravel (looks nice and comes in all colors). Fill your container with treated water (see the following question for treatment) just to the top of the gravel. As the gravel dries the moisture is released into the air creating humidity. DON’T let your plant sit on the gravel, because it will absorb the water and the roots will rot. You can place a baker rack over your container or use type of screen that will keep the pot off the gravel.