I grow commercially but limit my use of fungicides and pesticides to a minimum amount as much as possible. I have had it happen too. I assume I have over watered something or over heated in spots at times. I grow in a greenhouse on a bench and use large heat mats.... I use sterile mix and new inserts for this project. I can't afford to replace their seeds. I am growing for an orchard/farm stand type place this year. everything has been great until I started tomatoes. TOMATOES! of all things. I had two varieties that hardly germinated and two that were pelleted seeds that germinated just fine then practically keeled over. ARRG! I ordered new marriage heirloom and chef choice ones to replace what didn't germinate. I don't know if it was me or the seeds.
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carolyn k
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