Troubleshooting Winter Sowing failures: what went wrong and how to fix it *see note

I go through some common problems and thd causes and solutions for winter sowing failures people encounter when winter sowing including why seeds don't sprout, why seedlings look unhealthy or have yellowing leaves. please note that the initial leaves a plant produces will yellow and die and that's natural. don't worry if they get yellow. it's not a sign of Nutrition deficiency