One thing I noticed in using the paper towel method and the greenhouse jar method, is that I had a little bit better germination rate in the paper towels. But, after my plants started dying, I was able to replant from the jars without losing much growth time. The plants will live for weeks in the jars without having to add water or even look at them. There are still plants alive in my jars. So, doing both methods would cover all the bases. Good, fast germination in the paper towel, and back up plants in the jars.