First time grower- have any of you ever had green spots in your soil? What is it? Will it hard my plant?
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Every time I have seen it it has been algae growth due to overwatering. Do you have pics?
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I’ve read too humid and over watering will cause algae growth.
What is the medium? Is it new / fresh?
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Not new- Happy Frog and autoflower living soil concentrate
I never reused soil. It went into the compost pile or garden beds. I know I have read on the Forum where some that reuse their soil will sterilize it to some degree by baking it in an oven - Yumm. If the time of year was right, I would put it in black garbage bags in the garden to cook. Then put it in the garden.
I don’t think the algae is a problem but can’t say for sure.
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It may be some confusion- its technically new b/c this is my first grow