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- Feb 2, 2014
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- La Porte Texas
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This time of the year many of us will be planting seeds. We hold our breath waiting for the seeds to sprout and when they do we give a sigh of relief thinking all is well. And then what happens! Our seedlings get 3 or 4 inches tall and suddenly just fall over and die for no apparent reason. This is caused by a fungal disease called damping off and it only affects young seedlings. What it looks like in its early stages is the flattening or shrinking of the base of the plant right at soil level. If you can see it you might just as well start over because the plant will be stunted if not killed and production, if any, will be limited at best. As stated before this disease only affects young seedlings and there are ways to prevent it. The easiest way is to use sterilized seed starting soil. You can either buy it or make your own. I prefer to make my own because then I know for sure it is sterilized. Another way to prevent the disease is to incorporate whole ground, stone ground or horticultural corn meal into your potting soil or compost seed starting mix. 15% per volume works great. This cornmeal is NOT the stuff one normally sees at the grocery store. If anywhere on the bag or box it says "enriched" it is not the cornmeal you want. It must say whole ground or stone ground. Myself, I use both sterilized soil and the cornmeal and I take no chances. I do a lot of experimentation on tomatoes and some of the seeds are $.50 each and many almost that much, so a bunch of dead seedlings is not a good thing. I start out by sterilizing the soil. I use my homemade compost, well composted and then sifted through 1/8" wire. I put this soil into a #3 washtub and then build a fire under it until the soil reaches 170F, keeping it stirred and heated evenly. Then I put 10 quarts of this sterilized soil into my wheelbarrow and add 1 1/2 quarts of the cornmeal and mix thoroughly. After I plant the seeds I sprinkle cornmeal over the soil until I can't see the soil. It works. I haven't lost a seedling in many years to damping off by doing this.