Determining the right amount of soil for your urban planter boxes is crucial for healthy plant growth and cost efficiency. For three large rectangular planter boxes measuring 48 inches long, 24 inches wide, and 18 inches deep, here's how to calculate your soil needs. First, multiply the length, width, and depth of one planter box: 48 × 24 × 18 = 20,736 cubic inches. Convert this to cubic feet by dividing by 1,728 (since there are 1,728 cubic inches in a cubic foot), giving you 12 cubic feet per box. For three boxes, multiply 12 × 3 = 36 cubic feet. Since soil is often sold in cubic yards, divide 36 by 27 (the number of cubic feet in a cubic yard) to get approximately 1.33 cubic yards. It's wise to buy a little extra—about 10-15% more—to account for settling and top-ups, bringing your total to around 1.5 cubic yards. Consider using a high-quality potting mix designed for containers, as it provides proper drainage and aeration. This calculation ensures your plants have adequate root space and nutrients, promoting thriving urban gardens. Always double-check your box measurements before purchasing to avoid shortages or waste.
How much soil will I need to buy for a set of three large urban planter boxes?
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