How to Get Blue Hydrangeas

If you love blue flowers (and who doesn't?), one of the most popular must-have plants for your garden is hydrangea. These versatile shrubs produce giant ball-shape flowers that look stunning in the landscape surrounding your home, as specimen plants in your garden, and make gorgeous (and easy!) bouquets.

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Flowering Perennials from Spring to Fall

Turn your garden into a color show spring through fall. Here are 17 easy-to-grow flowering perennials.

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Garden Pictures That Inspire

Garden pictures can provide inspiration. Browse our gallery of garden pictures, including landscape garden pictures, to find the picture of a garden that will give you your perfect landscape.

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Growing Lilies and Daylilies in Your Garden

Daylilies and lilies are two big-impact, easy-to-grow plants for your summer garden.

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How to Grow Potatoes

Growing potatoes is easy, and you'll find the taste of homegrown potatoes much better than that of store-bought versions. You can grow potatoes in just a few easy steps. Learn how to grow potatoes, as well as how to harvest them for maximum flavor.

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Urban Gardens

Living in a space-challenged urban environment shouldn't stop you from enjoying fresh air. Check out these great ideas from some amazing city landscapes.

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How to Get Beautiful Texture in Your Garden

Add beauty and texture to your garden with leafy and flowering perennials, annuals, and grasses.

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Lawn Fertilizer Calculator

Eliminate the guesswork with this handy calculator.

Lawn grass fertilizers are primarily nitrogen plus smaller amounts phosphorous and potassium. The three numbers found on each fertilizer package (for example 30-2-3) indicates the percentage of each of these key nutrients. The first number (usually 25 to 35) indicates the percentage of nitrogen. Use the calculator below to see how many pounds of fertilizer you need to apply each year to keep your lawn healthy. In most cases, you would apply one-half to one-third of this amount in each of two or three well-spaced applications during the growing season.

Lawn fertilizer calculator

Enter the requested information below, then click Calculate to see the range of amounts of fertilizer you need annually. Remember, too much fertilizer is just as damaging as too little.

Square feet to be fertilized
Percent nitrogen in the fertilizer
Type of grass (check one)
Kentucky Bluegrass, Ryegrass
St. Augustine
Pounds of fertilizer needed per year:

Please note: For your convenience, this calculation has been rounded up slightly.

Important reminder: Every effort has been made to ensure the accuracy of this calculation. But before purchasing materials for any project, please check amounts with your suppliers or contractors.

Helpful Tips

  • Bags of fertilizer always provide a recommended application rate. This calculator will also provide the details you need.
  • Most lawns need regular feeding -- once or twice a year -- if they are to be lush and healthy. Feed cool-season grass (grass that generally stays green all year and grows primarily in the South) in the spring and autumn; feed warm-season grass (the Northern grasses that go dormant in the fall and winter) in the spring and summer.
  • Apply fertilizer with a spreader, for even distribution. A lawn's greatest need is for nitrogen, so the amount of fertilizer you need will depend on the nitrogen content of the fertilizer.

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