Being a lazybones I once tried peat Jiffy pellets in hope they'd save me a bit of extra work. I can't remember the diameter, but tomato seeds didn't germinate well in them unlike cucumbers which took the Jiffies in a stride. I never thought of taking the cover off, so I found it still in place when I pulled out my dead cucumbers at the end of the season. That's how I realized the "lazy ways" were not exactly what my plants deserved. Elbow grease is what they appreciate.
Milan HP