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Is wiping with rubbing alcohol enough to sterilise seed starting trays or is bleach or hydrogen peroxide necessary?

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    I don't think I've sterilized a seed tray in the last 40 years of gardening. The trick is to raise the plants in conditions that don't encourage pests and diseases to spread.
    – alephzero
    Mar 31, 2021 at 3:50
  • @Alephzero I have to plant some roselle. What steps do you recommend without sterilising? Do I keep the seed trays in full sun after planting? What about the cocopeat in which I put the seeds? Do I not sterilise that too?
    – Wodin Tiw
    Mar 31, 2021 at 4:05
  • What's the condition of the seed tray? New or used? If used, how much? Mar 31, 2021 at 19:47
  • Used seed trays. Two to three times. If I buy new ones, do I have to sterilise them as well?
    – Wodin Tiw
    Mar 31, 2021 at 23:53

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