I have a small hydroponics farm so I turn out a fair amount of seedlings every year. I have tried literally everything on the market. I use damp-off as a medium and place them on a heat mat - with the speedling tray covered with saran wrap. My germination rate is about 99% and typically the seedlings emerge in 3-7 days; at the most, for summer vegetables and flowers. If you are careful you can cut them up in more manageable numbers - I cut them up in sixes then number them --its really a fool-proof system.