I'm new to this forum and greenhouses too. I have a 16' x 20' greenhouse that I assembled this fall. So, I've started some plants from seed and I've bought plugs also. Most everything I've planted and most all of the plugs have had the leaves wither and fall off, and the plants then stop growing and die. I have watered and fertilized, maybe too much or too little, not sure. I have a ventless gas heater and keep the nighttime temperature at least 65 degrees. The humidity is usually 70-80(maybe too high). I have 6 palm trees and a few larger plants that seem to be doing ok. I even have coleus plants that have dropped seeds that have sprouted. I could provide more information, but I wanted to keep this as short as possible. I could use some help. Any advice would be greatly appreciated.
