This is the first year I’ve used Jiffy Pelletts for indoor seed raising of summer vegetables. I started with the 50mm size and have had great results, much better than in previous years when I made my own miix with cocoa coir and vermiculite. Now moving to the smaller sizes for raising single plants. I think the Jiffy growing medium is the reason for this success, it removes the guesswork. And the cost is about the same as DIY mixes. I’m totally converted!