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Mossy bloom
The grow bag compost around my 'vigourous' tomatoe plants has developed a mossy bloom. Is this due to moisture in the greenhouse? Is it likely to harm the plants?
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It's completely natural and won't harm the toms. Scrape it off if your'e worried.
Did you Fluff up the compost in the bag and turn it on its side before you planted up, grow bags are very compressed when they are new, just get a little trowel and loosen the surface.
Again. Thanks for your response.