True, which is why I stopped, BUT, you can cut around the paper and insert into starter cubesSome people have great results with the paper towel method but I've personally had shit luck with it. The roots can grow into the paper towel and, if you aren't careful, you can break the taproot when you pull them off the paper towel.
One thing I didn't realize, until recently, is the correct orientation the seed should be in when you plant it. I always assumed the seed should be planted so the "hinge" of the seed faces up so, when the seed cracks open, the taproot grows down into the soil. Seems to make sense, right? Then I saw this and it made me realize I had been planting them the wrong way.
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