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When you're planning a container garden with flowers or vegetables, you will need an assorted group of flower pots for planting. As you put together different plants for attractive displays on a deck or patio, consider the size of the flower pots to ensure your plants have adequate growing room. Measure the dimensions and sizes of flower pots before you plant, and then match the plants with an appropriate size container for the best planting results.

Measure the height of the container from the base to the rim with the ruler. Write this measurement down on paper.

Measure the diameter of the container straight across the bottom with the ruler. If the container is wider at the rim than at the base, measure both the rim diameter and the base diameter and average them (add both measurements together and divide by two). Write this measurement down on the paper.

Divide the diameter of the container by two and multiply the answer by itself. For example, if the diameter is 10 inches, divide 10 / 2 = 5 * 5 = 25.

Multiply the answer by 3.14 and then multiply the answer by the height. This gives you the volume of the container in cubic inches. For example, multiply 25 * 3.14 = 78.5 * 14 (height) = 1099 cubic inches.

Convert the cubic inches to dry gallons by multiplying the cubic inches by .00372. Round your answer up or down to the nearest gallon. For example, multiply 1099 * .00372 = 4 gallons.

Measure the height of the container from the base to the rim with the ruler. Write this measurement down on paper.

Measure the sides of the container straight across the bottom with the ruler. Write these measurements down on the paper. You will either have four identical measurements (square) or two identical sets of measurements (length and width -- rectangle).

Multiply the length by the width and then multiply the answer by the height to find the cubic inches. For example, 4 * 6 = 24 * 8 = 192 cubic inches.

Convert the cubic inches to dry gallons by multiplying the cubic inches by .00372. Round your answer up or down to the nearest gallon. For example, 192 * .00372 = .7 gallons (round up to 1 gallon).

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