I planted brugmansia seeds, and when they come up they get about 2 inches tall then wilt and die. I don't know what I'm doing wrong. My seedlings die when they are only a day old...the leaves will be full, then shrivel, fall off then the rest dies.
Brugmansia Seedlings Dying
Certified GKH Gardening Expert
This could be damping off, which is a fungus that effects seedlings.
Also if the seedlings are exposed to bright sunlight they can burn up and die quickly.
Make sure you are using a good sterile soilless potting mix and keeping seedlings moist. Not to dry or to wet.
Here are some links that may help you.