It is worth a try. Do you mean to leave the nodes on and fill with soil just below them or pluck them off and fill above them? Either way is okay.
Just start some more seeds now with only potting mix and start a journal over in the grow journals section on your whole grow with all your plants.
Do a side by side with your local bought potting mix vs. your clay+compost mix, with some landraces, and some hybrids.
Maybe more people will help you if you have your journal in the right place, this thread was for help germinating your hybrids, now that is done, you should start a new one.