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| I re-potted a few tomato seedlings last weekend from a bag of organic Miracle Gro. When I opened the bag there was a bit of mold (at least I think, it was white fuzzies) on the edges but as it was all I had at the time I used it anyways. Now there's white mold on the surface of the soil of the pots. Anyone else experience this? Should I re-pot them? (for the record, I don't like Miracle Gro's support of GMO research but it was the only organic soil available where I was) |
Follow-Up Postings:
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| It is usually fungus, not molds, and these so-called "organic" mixes contain many different forms of fungus in the dehydrated chicken manure, feathers, etc. they add. The fungi usually only grow like this when provided with the ideal warm air temps and overly wet conditions. So the solution when using these mixes is to reduce the ambient air temps, increase air circulation with a small fan of sorts, and cut back on the water. You can scrape it off the soil surface but it will just return unless the conditions that encourage it are eliminated. Since those appear to be quite large pots for such small seedlings reducing the watering will have a double benefit. For future reference any seed starting mix which does not contain added fertilizers (that the seedlings don't need anyway) is considered "organic" and approved for use by even certified organic growers. They contain only peat, coconut coir, and vermiculite or perlite. There are many of them available. Slapping the "Organic" label on as a few marketers do is just a marketing gimmick. Dave |
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| And in addition to that I'd sprinkle cinnamon powder on the soil surface. It works as a natural fungi inhibitor. |
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| Thank you both. I do have a fan running in the room because I thought that might be the issue, but I will scrape it off and try the cinnamon as well. And I'm going out of town for a bit and my mom will be watching the plants...I'm sort of betting on her to forget watering every couple of days :-) That's why they're in the larger pots now. |
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- Posted by potterhead2 z5b NY (My Page) on Sun, Mar 24, 13 at 16:38
| Please tell your Mom NOT to water "every couple of days"!!! In those large pots it will probably take a week (at least) for the soil to dry out. You should only water tomatoes (and most plants) when the soil is pretty dry. poke your finger in a couple of inches. If you feel any moisture, do NOT water. |
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