Calculating Plant Spacing and the Number of Plants Needed for a Given Area.
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Example: A. For a square planting pattern with plants spaced 6" on center (O.C.), each plant needs 36 square inches. The total square footage of the planting area is 100 ft2. Step 1 100 × 144 = 14,400 in2. Step 2 14,400 ÷ 36 in2 = 400 plants..
B. For a triangular planting pattern with plants spaced 6" O.C., each plant needs 31.2 square inches. The total square footage of the planting area is 100 ft2. Step 1 100 × 144 = 14,400 in2. Step 2 14,400 ÷ 31.2 in2 = 462 plants.