Just thought I'd note that after having helmet head problems last year, per the guidance some of you provided here, I planted a bit deeper (1/4"-3/8") and watered more frequently (3 day interval vs. 4) than last year and did not have a single helmet head in the 50+ seeds I started. This was in diatomaceous earth in a germination chamber with heat mat. Also had all but one seed germinate. Thanks all for the advice.
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