About 2 to 3 months before planting the seeds I mixed peat moss with potting soil that I screened with a 1/4 in. screen, with blood meal, bone meal, perlite and vermiculite. After a few days in the foam cups, the plants needed more root room. I put them in 1 gallon pots with the mix I just described. The idea is to not have to give many nutes for the first few weeks just CalMag.