In my last system, I bought a bunch of those little peat pucks, put the seeds on them, then burried them right at the high water point in the GB. Worked great for peppers and tomatoes. Dill sprouted, but then wilted... I'm thinking they don't like wet roots. For some plants, maybe we need to shake the soil off once they get gonig? The soil is always where I found the most worms in the GB.