For me this has been a tough year to get small seeds germinated. I just planted last weekend so early to tell but the top 3/4'' is dry dirt and the carrots and other small seeds are 1/4'' deep sitting in dry dirt. The corn, peas and other stuff seems to be coming ok , A little spotty but it usually seems to catch up in the end. If your ground is so dry that you need to water then keeping it wet is important for germination , Other wise your seeds get wet and then dry out before the next watering, I don't think they can take much of that but once out of the ground they are ok drying out between watering. I covered a couple rows with cardboard and a couple with carpet just to experiment . I'd replant some of it or keep planting if you have room just to learn what works and what doesn't. There is still plenty of time. I'll still be planting a little here and there for a couple more weeks.