Answer: It is true that you can make your own growing medium for container gardening that will serve as an excellent substitute for garden soil.
Here are two recipes:
Basic Peat Mix (makes one cubic yard)
1/2 cubic yard of sphagnum peat moss
1/2 cubic yard of vermiculite
Mix together well; then add:
5 pounds dolomitic limestone
1 pound superphosphate
2 pounds 5-10-5 fertilizer
After mixing thoroughly, store in plastic bags. Moisten mix prior to use.
Here's an organic version of soilless mix:
16 quarts of sphagnum peat moss
16 quarts vermiculite
7 ounces bone meal
3 1/2 ounces dried blood meal
3 1/2 ounces ground limestone
Mix thoroughly and store in plastic bags. Moisten mix prior to use.
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