The Q&A Archives: Green Growth on Greenhouse Containers

Question: What is the green stuff growing on the top of the soil in some my greenhouse containers? It can be scraped off and it hasn't gone any further over the top.

Answer: It's probably a moss or algae. Which ever it is, it is not a plant disease, but rather a sign that you are keeping the soil too wet. Back off the watering a bit, allowing the plants to dry out some between waterings. This will cut down on the unsightly green stuff.

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