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Prices start at : 19.95 USD / 1 GAL
An example would be 10-10-10 or 12-4-8. Its better to leave a one inch gap of space between the mulch and the stem or trunk of the plant. Elements such as Magnesium, Sulfur, Calcium, Iron, Manganese, Copper, Zinc, Boron, and Molybdenum play very important...