The weather always keeps us guessing. I use worm castings and peat moss for most of my seedlings and then we transplant them into 4 gal buckets in the green house. I use worm castings, my own compost and a mixture of frass as my soil base with peat moss and then I use worm tea or top feed castings from my worm tea brews that will have a little bio char and other meals I like to use.