How to Care for Pansy Flowers

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Although they seldom grow taller than 6 to 9 inches, pansies (Viola x wittrockiana) offer charming monkey-faced flowers up to 4 inches across. Short-lived perennials in U.S. Department of Agriculture plant hardiness zones 6 to 10, where they are usually set out in fall for cool-season bloom, pansies are also grown as hardy annuals farther north. There, they generally bloom from late spring through early summer before declining in midsummer heat. They prefer acidic, humus-rich soil in full sun to partial shade and should be planted at least 7 inches apart to prevent fungus problems.

How to Care for Pansy Flowers
(Santy Gibson/Demand Media)

Things You'll Need

  • Watering can
  • 5-10-5 granular fertilizer
  • Pine straw or mini bark nuggets
  • Straw
  • Iron phosphate slug bait
  • Sprayer
  • Neem oil
  • Goggles
  • Respirator
  • Garden shears
Step 1

Water your pansies during dry weather, often enough that they receive at least 1 inch of water per week. Avoid splashing their leaves, as that can cause fungus problems.

Santy Gibson/Demand Media
Step 2

Scratch a 5-10-5 granular fertilizer into the ground around the pansies one week after setting them out, applying 8 ounces for every 25 square feet of garden bed and watering it in. Fertilize spring-planted types once a month thereafter until they stop blooming, usually in midsummer. For fall-planted varieties, apply that fertilizer once every three months until early spring, after which it should be increased to once a month.

Santy Gibson/Demand Media
Step 3

Mulch the pansies, after fertilizing them, with 1 to 2 inches of pine straw or mini bark nuggets to suppress weeds and retain moisture in the soil. Cover the plants completely whenever the temperature threatens to fall below 20 degrees Fahrenheit. Heap straw or pine straw lightly over them, being careful not to crush their foliage, and remove the covering when the weather warms again.

Santy Gibson/Demand Media
Step 4

Scatter a slug bait containing iron phosphate around the plants during the months that snails and slugs are active. Use about 1 teaspoon of the pellets per square yard, and renew the bait every two weeks or after heavy rains.

Santy Gibson/Demand Media
Step 5

Watch for brown fungus spots on your pansies or pests such as aphids, which look like green lice, or spider mites, which resemble active dust motes. If you see any of these problems, snip off the damaged leaves first and treat the plants with neem oil, which is both a fungicide and an insecticide. Stir 2 tablespoons of the oil into 1 gallon of water and -- wearing goggles and a respirator -- spray the plants thoroughly in the morning, repeating the treatment once every seven to 14 days until the problem is gone.

Santy Gibson/Demand Media
Step 6

Snip or pinch off the withered flowers on your pansies. This should prevent the plants from going to seed, thus prolonging their bloom time. Sterilize your pruning tool blades by wiping them off with alcohol and allow the blades to dry before using.

Santy Gibson/Demand Media

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