How to Calculate Bedding for Plants or Seeds

Updated February 21, 2017

Garden beds are places to display a number of plants for their flowers and foliage. Choosing bedding plants for your garden bed gives you an instant flower garden for beauty all season long. When planting a garden you have to calculate how many different plants or seeds you need to fill the bed. The number of bedding plants depends on spacing and how large the garden bed is. The size of your plants is also a factor.

Measure the length and width of your garden bed with the measuring tape. Multiply the width by the length to get the square footage of your garden bed.

Determine the spacing needed for each of the bedding plants. Most plants will have spacing information on their tags. For plants with a 6-inch spacing, use four plants per square foot. For plants with 8-inch spacing use 2 plants and for 12-inch spacing use one plant. For seeds, space them 2 to 3 inches apart, about 6 per square foot.

Divide the total square feet of your garden bed by the number of plants or seeds per square foot that you want to plant. This will be the number of bedding plants you need to purchase. For example, if your garden is 100 square feet and you want to plant 4 plants per square foot you need 25 bedding plants.

Things You'll Need

  • Measuring tape
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About the Author

Hollan Johnson is a freelance writer and contributing editor for many online publications. She has been writing professionally since 2008 and her interests are travel, gardening, sewing and Mac computers. Prior to freelance writing, Johnson taught English in Japan. She has a Bachelor of Arts in linguistics from the University of Las Vegas, Nevada.