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Entry Date
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Location
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Saturday, April 27, 2013
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SGPG
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South
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Entry 5 of 6 |
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Why Sterilize Potting Soil?
Sterilizing potting soil is very important when sowing seeds, seedlings, and cuttings. Soil naturally contains pathogens, harmful bacteria, and fungi that can harm or kill susceptible plants. Insects and larvae may also be present, which can harm plants and become a nuisance. Store bought soil that claims to be sterile may be contaminated via bag punctures, old shelf life, mishandling, and other numerous reasons. Sterilizing potting soil is easy and very beneficial to plant health. Only a few household items are needed, and about 45 minutes of time to prepare and sterilize the soil.
"Be forewarned - sterilizing potting soil indoors will cause an unpleasant odor that is extremely earthly. Some people can tolerate it, but others may be panicking to open the windows for fresh air. Open the windows and turn on a ceiling fan before sterilization begins. The odor will not linger very long if indoor air is circulating with outdoor air."
Soil Consistency
The soil needs to be moist enough to compact into a ball, but should crumble when pressure is removed. This can be done by simply packing a ball of soil between the hands. Add a little water and mix until consistency is met.
Placing Soil into Pan
Place the soil into a roasting pan or baking sheet. Evenly distribute the soil in the pan and break up any clumps. Do not fill to the edge of the pan, and keep depth under 4 inches deep. Cover the pan or sheet tightly with aluminum foil. The foil needs to be tight and secure to prevent moisture loss and burning of the soil. Poke a hole in the center of the foil that is large enough for a meat thermometer to fit through.
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