I used Jiffy this year, for the fourth year and it worked fine. You do have to stay on top of the watering. I often have 100% germination. It is not my choice of soils, but I do not have any options locally.
“I used Jiffy this year, for the fourth year and it worked fine. You do have to stay on top of the watering.”
I have tried Jiffy, watering from the top because I didn’t think of wetting it before I put the seeds in. Then, I started more seeds, wetting the Jiffy before I put the seeds in, and only one cup has anything in it and that one just started. With Espoma, the seeds I started at the same time as Jiffy, the seedlings are so thick now, I’ve got to transplant into larger pots with only that one bit up with the Jiffy.
I don’t have to prewet with the Espoma as the water is sucked up into the cup by the next day after I planted the seeds. The only way water gets into the cups using Jiffy, is to water them from the top.