My "simple" method... I am not an expert, but I cut 7-8 to eight at a time and at most one dies. So I must be doing something right:
1.) Solo Cups with holes cut at bottom
2.) Soil - MG Seed Starter with 30-40% PLAIN (not MG with nutes) Perlite added in. Make it moist, not wet, with PH 6.5...