Outdoor

Can Calla Lilies Be Planted Outdoors? Everything You Need to Know

can calla lilies be planted outdoors

Calla lilies are a stunning addition to any garden, known for their elegant, trumpet-shaped flowers and smooth, glossy foliage. But if you’re considering planting calla lilies outdoors, you might have some questions. Will they thrive in your climate? What care do they need? In this article, we’ll dive into everything you need to know about planting and caring for calla lilies outdoors.

What Are Calla Lilies?

Before we get into planting tips, it’s important to understand what calla lilies are. These beautiful plants, native to Southern Africa, are known for their large, showy flowers and dramatic, spade-like leaves. Despite their name, calla lilies aren’t actually true lilies; they belong to the Araceae family. They are perfect for adding a touch of elegance and sophistication to gardens, particularly in the spring and summer.

Can Calla Lilies Be Planted Outdoors?

Yes, calla lilies can be planted outdoors, but there are a few things to consider to ensure they thrive in your garden. Calla lilies are typically grown in warmer climates and are sensitive to frost, so it’s crucial to plant them in areas where the temperatures remain consistently warm throughout the growing season.

Ideal Climate for Outdoor Calla Lilies

Calla lilies flourish in USDA hardiness zones 8-10, meaning they do best in regions with mild winters and warm summers. In these zones, calla lilies can be planted outdoors year-round. However, in colder climates (zones 3-7), it’s best to plant calla lilies in the spring after the threat of frost has passed. You can also dig up the bulbs before the first frost in fall and store them indoors until the next planting season.

When Is the Best Time to Plant Calla Lilies Outdoors?

The best time to plant calla lilies outdoors is in spring, once the danger of frost has passed and the soil has warmed up. Aim for planting in late April to early May, depending on your local climate. The soil temperature should be at least 60°F (15°C) for optimal growth. Planting too early in cold soil can result in poor growth and may even cause the bulbs to rot.

How to Plant Calla Lilies Outdoors

Planting calla lilies is fairly simple, but following the right steps can make all the difference. Here’s how to do it:

1. Choose the Right Location

Calla lilies thrive in full sun to partial shade. Select a spot that receives at least 6 hours of sunlight per day. They also prefer well-drained soil with a slightly acidic to neutral pH.

2. Prepare the Soil

Ensure the soil is loose and well-draining. If your soil is heavy or clay-like, amend it with organic matter like compost or peat moss to improve drainage. Calla lilies don’t like standing water, so good drainage is key to their success.

3. Plant the Bulbs

Dig a hole about 4-6 inches deep and space the bulbs 6-12 inches apart. Place the bulbs with the pointed end facing up. Cover the bulbs with soil and water them well.

4. Water and Mulch

After planting, water the soil thoroughly to settle the bulbs in place. Adding a layer of mulch will help retain moisture, suppress weeds, and regulate soil temperature, providing an ideal environment for growth.

How to Care for Outdoor Calla Lilies

While calla lilies are relatively low-maintenance, they do need some care to thrive outdoors. Here are a few tips to keep them healthy:

1. Watering

Calla lilies prefer moist soil but don’t like being waterlogged. Water regularly, especially during dry spells, but allow the soil to dry out slightly between waterings. Overwatering can lead to bulb rot, so be sure your planting site has good drainage.

2. Fertilizing

Calla lilies benefit from regular feeding. Use a balanced, slow-release fertilizer during the growing season. Apply it in early spring as new growth begins, and then again mid-summer to promote robust blooms.

3. Pruning

To encourage more blooms and a tidy appearance, remove spent flowers and yellowing leaves regularly. You can also cut back the foliage in the fall once it starts to die back, especially if you’re in a colder climate where frost will kill the plant.

4. Protecting from Frost

If you’re in a zone where frost is a concern, be sure to dig up the bulbs before the first frost hits in the fall. Store them in a cool, dry place over the winter and replant them in the spring.

Potential Issues to Watch Out For

Like any plant, calla lilies can be susceptible to certain pests and diseases. Here are some common problems to look out for:

1. Pests

Calla lilies are occasionally plagued by aphids, slugs, and snails. Regularly inspect your plants and use organic pest control methods if necessary.

2. Diseases

Root rot, leaf spot, and bacterial blight can affect calla lilies, especially if they are overwatered or planted in poorly-drained soil. Be mindful of watering practices, and consider using fungicide if necessary to combat fungal diseases.

Can Calla Lilies Be Left Outdoors Year-Round?

If you’re in a warmer climate (zones 8-10), calla lilies can be left in the ground year-round. They will die back in the fall and re-emerge in the spring. However, in cooler climates, it’s best to dig up the bulbs and store them in a cool, dry place over the winter. This will help protect them from freezing temperatures and give them the best chance to grow again next season.

Conclusion: Planting Calla Lilies Outdoors

Calla lilies can definitely be planted outdoors, but they do best in warm climates and with proper care. Ensure you plant them in the right spot with well-drained soil, water them regularly (but not excessively), and keep an eye out for pests and diseases. By following these tips, you can enjoy the stunning beauty of calla lilies in your garden year after year.

Related Posts

Post Comment