PSA: I finally stopped using old plastic pots for my seedlings
For years I just reused any old container I had, like yogurt cups with holes poked in the bottom. Last spring, over half my tomato starts got stunted and I lost about 30 plants. My friend in Madison said to try those cheap 1020 trays with the proper cell inserts, so I bought a set for 12 dollars. The difference in root growth after just three weeks is crazy. What's a small change that saved your plant starts?
That "germination rate doubled" thing is no joke. I had the same thing happen with my pepper seeds last year, they just sat there doing nothing until I got a mat. It's crazy how much of a difference a little bottom heat makes.