Can You Grow A Calla Lily Outdoors?

Calla lilies are a real treat for the eyes with their elegant, trumpet-shaped flowers and lush, green leaves. But can you grow them outdoors? If you're pondering this question, you're not alone. Many plant lovers are curious about cultivating these beauties in their garden.

In this article, we'll walk you through everything you need to know about growing calla lilies outdoors. From understanding their growth needs to practical tips on planting and maintenance, you'll discover how to make your garden flourish with these stunning flowers.

Getting to Know Calla Lilies

Before we dig into the details of outdoor planting, let's take a moment to understand what makes calla lilies unique. These plants are native to southern Africa, where they enjoy a warm, subtropical climate. Despite their name, they aren't true lilies but belong to the Araceae family.

Calla lilies are adored for their striking appearance. Their flowers, technically known as spathes, come in a variety of colors—from classic white to vibrant pinks, purples, and yellows. The spadix, a spike in the center of the spathe, is where the actual tiny flowers are located. These plants can grow up to two to three feet tall, making them a fantastic addition to any garden.

The roots of calla lilies are rhizomes, which are thick, underground stems. Rhizomes store nutrients and help the plant survive through unfavorable conditions. This characteristic is what enables calla lilies to thrive in diverse settings, including outdoor gardens.

Can Calla Lilies Thrive Outdoors?

Calla lilies are quite adaptable, but their ability to thrive outdoors depends largely on your local climate. They prefer warmer temperatures and are best suited for USDA hardiness zones 8 to 10. However, with a little extra care, they can be grown in other regions as well.

In warmer climates, calla lilies can be planted outdoors year-round. They love the sun, but in extremely hot areas, some afternoon shade can prevent the leaves from scorching. In cooler climates, they can be grown as annuals or brought indoors during the winter months to protect them from frost.

For those living in regions with harsh winters, a clever trick is to plant calla lilies in pots. This way, you can move them indoors when the weather turns chilly, ensuring they stay healthy and vibrant.

Choosing the Right Location

Picking the perfect spot for your calla lilies is crucial. These plants thrive in areas that receive full to partial sunlight. Ideally, they should get about six hours of sunlight each day to ensure robust growth and abundant flowering.

If you're living in a particularly hot region, consider a spot where your calla lilies can enjoy some afternoon shade. This will help prevent the blooms and leaves from wilting under the intense sun.

Additionally, calla lilies prefer well-drained soil. If your garden soil is heavy or clay-like, amending it with organic matter such as compost can improve drainage. You can also plant your calla lilies in raised beds to enhance soil conditions further.

Preparing the Soil

Getting the soil right is a game-changer for growing calla lilies outdoors. These plants prefer slightly acidic to neutral soil, with a pH ranging from 6.0 to 6.5. You can easily test your soil's pH with a home soil testing kit.

Once you know your soil's pH, you can make necessary adjustments. Adding sulfur can help lower the pH if your soil is too alkaline, while lime can raise the pH if it's too acidic.

Beyond pH, calla lilies thrive in nutrient-rich soil. Incorporating organic matter like well-rotted manure or compost will provide essential nutrients and improve soil structure. This ensures your calla lilies have everything they need to grow strong and healthy.

Planting Your Calla Lilies

Planting calla lilies is a straightforward process, but timing is everything. The best time to plant your calla lilies outdoors is in the spring, after the danger of frost has passed. This gives them plenty of time to establish before the growing season begins in earnest.

1. Prepare the planting area: Loosen the soil to a depth of about 12 inches and mix in some compost or well-rotted manure to enrich it.
2. Plant the rhizomes: Position the calla lily rhizomes about 4 inches deep, with the growing points facing upwards. Make sure to space them about 12 inches apart to give them room to spread.
3. Water thoroughly: Give your newly planted calla lilies a good soak to help settle the soil around the rhizomes.
4. Mulch the area: Adding a layer of mulch can help retain soil moisture and suppress weed growth.

Once planted, keep an eye on the weather and water your calla lilies regularly, especially during dry spells.

Watering and Feeding

Calla lilies are not overly demanding when it comes to watering, but they do appreciate consistent moisture—think of it like a steady diet for your plants. During the growing season, ensure they receive at least an inch of water per week. Be cautious not to overwater, as soggy soil can lead to root rot.

A good practice is to water deeply and less frequently, allowing the top inch of soil to dry out between waterings. This encourages the roots to grow deeper, making the plant more resilient.

As for feeding, calla lilies benefit from a balanced, slow-release fertilizer applied at the start of the growing season. You can choose a fertilizer with equal parts nitrogen, phosphorus, and potassium. Follow the package instructions for application rates and methods.

Dealing with Pests and Diseases

While calla lilies are generally hardy, they can sometimes fall prey to pests and diseases. Common pests include aphids, slugs, and snails. Luckily, these are usually manageable with natural remedies or by encouraging beneficial insects in your garden.

For aphids, a gentle spray of water or insecticidal soap can help. Slugs and snails can be deterred with barriers like crushed eggshells or copper tape. If you're facing persistent pest issues, introducing ladybugs or lacewings into your garden can provide a natural solution.

On the disease front, keep an eye out for signs of rot or fungal infections, particularly in wet conditions. Ensuring proper drainage and avoiding overcrowding can prevent most issues. If you notice any rot, remove affected parts immediately to halt the spread.

Overwintering Calla Lilies

If you're in a region with cold winters, overwintering your calla lilies is essential. The goal is to protect the rhizomes from freezing temperatures.

Here's a simple method to overwinter your calla lilies:

1. Before the first frost, carefully dig up the rhizomes, being mindful not to damage them.
2. Allow the rhizomes to dry for a few days in a cool, dry place.
3. Once dry, store them in a box filled with peat moss or sawdust. Place the box in a cool, dark location, such as a basement or garage, where the temperature remains above freezing.
4. In the spring, when the soil has warmed up, replant the rhizomes outdoors.

This process will ensure your calla lilies are ready to bloom beautifully the following season.

Companion Planting Ideas

Calla lilies can be a wonderful part of a diverse garden landscape. They pair beautifully with a variety of other plants that complement their growth habits and aesthetic appeal.

Consider these companion plants:

• Ferns: Their delicate, feathery foliage contrasts nicely with the bold leaves of calla lilies.
• Hostas: These shade-loving plants can add depth and texture to the areas where calla lilies may benefit from some shade.
• Astilbe: With their plumes of flowers, astilbes provide a lovely backdrop for the striking calla lily blooms.

By mixing and matching plants, you can create a garden that's not only visually appealing but also supportive of the different needs of each species.

Final Thoughts

Growing calla lilies outdoors can be a rewarding experience, offering vibrant colors and unique shapes to your garden. By understanding their needs and providing the right conditions, you can enjoy these stunning flowers for many seasons.

At Cafe Planta, we're passionate about helping you care for your plants. Whether you're looking for new additions to your garden or need advice on plant care, we've got you covered. Feel free to email us or reach out via Instagram. We're here to support you on your plant journey, no matter where you are in your experience. Let's cultivate a love for plants together!