How to Care for Mums


With close to 160 different species, chrysanthemums, or mums, give you plenty of choices for color, sizes and growth habits. You can choose from 6-foot tall varieties to those that grow only 1 foot tall and from single, 2-inch flowers to double-form flowers. Mums are usually an easy-care plant, but with attention to care, you can maximize their growth and their hardiness.

How to Care for Mums
(Santy Gibson/Demand Media)

Mum hybrids (Chrysanthemum x grandiflorum) appear in nurseries and grocery stores year-round, but they typically bloom in your yard in late spring or early fall and are generally hardy in U.S. Department of Agriculture plant hardiness zones 5 through 9, depending on variety. Mums prefer full sun, but will also do well with partial shade. They do best with regular watering, about once a week or more in hot weather, and thrive in slightly acidic, rich and well-draining soil.

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For the best blooms and healthiest plants, fertilize your mums with a 15-15-15 multipurpose fertilizer blend, using about 1 pound for each 100 square feet of garden space. Feed your plant about every 10 days from spring until the buds begin to show some color. Sprinkle the fertilizer lightly around each plant and work it into the soil slightly, and then water the plant well to help the fertilizer reach the mum's roots.

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Mums produce bigger flowers and more sturdy stalks if you pinch the tips of each stem back throughout the growing season during the spring and summer. Stop pinching once you see buds begin to color. Pinching prevents the plant from becoming leggy, with skinny stalks that tend to fall over. Plant potted mums in your garden at any time, where they will revert over time to a fall blooming schedule. Divide existing garden plants in early spring as new growth begins or after the plant finishes blooming in the fall.

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Aphids appear in all USDA zones, and you can remove them with a strong spray of water. In hot climates, mums may be attacked by boring insects that are the larvae of beetles or moths. Preventive measures work best for borers -- clear weeds from underneath your mum and remove leaves and stems infested with larvae. If prevention doesn't work, apply the pesticide Bt or Bacillus thuringiensis with a garden sprayer to cover the leaves and stems of the mum. Mix 1/2 to 4 teaspoons of a concentrate for each 1 gallon of water and apply weekly until the infestation is gone. Wear gloves and eye protection, and follow all label safety precautions when applying.

Santy Gibson/Demand Media


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