Posted: 13/02/2013 at 13:38
I am in the process of growing alot of seedlings under lights. I have succesfully grown dianthus deltoids, campanula carpactica, lobelia trailing type, snow in summer, aubrita and pansies etc under the lights but for some reason my pestemon seed leaves go brown and shrivel and the seedling dies. I thought perhaps it was my lights which I found strange as penstemon are from a much hotter brighter climate than most of the other seeds so i took the lights off and placed on windowsill, However ones that have sprouted since the others died are taking ages to develope a true set of leaves and some are starting to die. What am i doing wrong?