How to Plant Calla Lilly Bulbs

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Calla lilies (Zantedeschia aethiopica) originally hail from the riverbanks of South Africa. Today, you can find it growing everywhere as an annual and as a perennial in U.S. Department of Agriculture plant hardiness zones 8 through 10. This bulb produces scented flowers of various hues, including red, pink, yellow and white. Plant calla lilies to add a dash of color and smell to your backyard.

You Are My Sunshine

  • Calla lilies experience the most vigorous foliage growth, and produce the most flowers, when planted in full sun. That's a minimum of approximately six hours of direct sunshine every day. The bulbs do even better if most of that sunlight exposure happens in the morning, so consider choosing a planting site on an east-facing side of your property.

Getting Down and Dirty

  • Healthy soil creates healthy gardens. Before planting your calla lilies, prepare the soil for success. Break up the soil to a depth of 8 to 12 inches with a spade, then remove any rocks or similar debris. Mix in a couple inches of compost or aged manure, which helps the soil retain moisture and also improves aeration. Finally, stir in 2 pounds of bonemeal for every 50 square feet of flowerbed you're preparing. The phosphorus in bonemeal enhances bulb plant health. Alternatively, you can use a 5-10-5 fertilizer on clay or loam soil or a 5-10-10 fertilizer on sandy soil, applied at a rate of 1 1/2 pounds per 50 square feet.

The Perfect Planting Plans

  • Your garden is ready for your calla lilies as soon as the last frost date in your region has passed. Some gardeners start with calla lily bulbs, either purchased from a garden store or dug up at the end of the previous growing season and stored in a cool, dark, dry place. Plant the bulb -- technically not a true bulb, but a rhizome root -- 4 to 6 inches deep in your prepared soil. If you're planting more than one calla lily, separate each bulb by approximately 24 inches. If you're instead using calla lilies that have already been started in pots, which you can find in many nurseries and greenhouses, carefully remove the lily from the pot by turning the pot on its side and wiggling the plant gently to slide it out of its container. Dig a hole in your prepared soil that is the same size as the lily's original pot. Place the lily into the hole and fill in the hole, burying the lily at the same depth that it was buried in its pot. If transplanting multiple lilies, space them apart by approximately 24 inches.

Rain, Rain, Don't Go Away

  • In the wild, you can find calla lilies growing along streams and riverbanks. That gives you a hint that this plant prefers consistently moist soil conditions to thrive. Water your calla lilies twice a day or as necessary to keep the soil moist to a depth of 8 to 12 inches. If it rains a lot in the area where you live, you can decrease watering frequency. Watch the lilies for signs of drought stress, signaled by wilting or yellowing of its leaves, and increase watering frequency if required.

References

  • Photo Credit Gabriele Maltinti/iStock/Getty Images
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