Well, everything in my Jiffy pellets sprouted, only to die about 3 weeks later. I did everything I could think of. The seedlings I started in soil are doing great. The ones in the Jiffy pellets seemed to "dry out" at the base of the stem only, then keeled over. About 1/4 of them are still hanging in there, but the rest are all dead.
I'll never use Jiffy pellets again.
I also found out Miracle Gro is owned by Scotts, a Monsanto owned company, so I won't be using their seed starting soil again in the future. I cannot find any information that says whether or not Jiffy is linked to Monsanto.