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Yes, a calla lily plant can be planted outside, and it will thrive beautifully when given the right conditions.
Calla lilies are actually quite versatile, and planting them outdoors is a fantastic way to enjoy their elegant, trumpet-shaped blooms in your garden.
If you’ve been wondering if you can plant calla lily plants directly into your outdoor flower beds, the answer is a resounding yes, provided you live in the right climate or are willing to dig them up for winter.
In this post, we’ll explore exactly when and how you can plant a calla lily outside, the best conditions for them, and what you need to know to keep them coming back year after year.
Let’s dig into the details of growing these gorgeous plants in your outdoor space.
Why You Can Plant A Calla Lily Outside
You can plant a calla lily outside because they are hardy perennials in warmer zones, and even in cooler areas, they can be planted outdoors as annuals or dug up and stored.
These plants naturally grow in marshy areas and along riverbanks, so they are adapted to life outdoors where they get plenty of moisture and sunlight.
When you plant a calla lily outside, it rewards you with larger, more vibrant blooms than when grown indoors in a pot.
The key is understanding your local climate and giving the plant the right soil and sun exposure.
1. Climate Zones For Outdoor Calla Lilies
A calla lily can be planted outside year-round in USDA hardiness zones 8 through 10.
In these warmer regions, the rhizomes can stay in the ground all winter because the soil doesn’t freeze deeply.
If you live in zones 3 through 7, you can still plant a calla lily outside, but you’ll need to treat it as an annual or lift the rhizomes before the first frost.
Many gardeners in cooler climates successfully plant calla lilies outdoors every spring and simply dig them up in the fall.
This makes planting calla lily plants outside a viable option no matter where you live, as long as you’re willing to do a little extra work in colder zones.
2. Sunlight Requirements For Outdoor Planting
When you decide to plant a calla lily outside, choose a spot that gets full morning sun but some afternoon shade.
In cooler climates, calla lilies can handle full sun all day, but in hotter areas, too much intense afternoon heat can stress the leaves.
A location with dappled shade or filtered light will keep your calla lily plant outside looking fresh and prevent the foliage from scorching.
If you plant calla lily rhizomes in too much shade, you’ll get lots of leaves but very few flowers.
Getting the light balance right is one of the most important steps for a successful outdoor calla lily planting.
3. The Right Soil For Outdoor Calla Lilies
You can plant a calla lily outside in almost any soil, but it performs best in rich, well-draining soil that retains some moisture.
These plants love water, so the soil should never completely dry out, but it also shouldn’t stay waterlogged.
Amend your garden bed with compost or organic matter before planting to give your calla lily plant outside the nutrients it needs.
A slightly acidic to neutral pH between 6.0 and 7.0 is ideal for outdoor calla lilies.
If your soil is heavy clay, mix in some sand or peat moss to improve drainage, since calla lilies will rot if they sit in overly soggy ground for long periods.
How To Plant A Calla Lily Outside Step By Step
Planting a calla lily outside is fairly straightforward, but following a few key steps will ensure your plant gets off to a strong start.
The best time to plant calla lily rhizomes outdoors is in the spring after all danger of frost has passed.
Here’s exactly how to do it.
1. Prepare the Rhizomes Before Planting
Before you plant a calla lily outside, inspect the rhizomes for any soft spots or signs of rot.
You can soak the rhizomes in lukewarm water for an hour to rehydrate them, which encourages faster sprouting.
This little step makes a big difference when planting calla lily plants outside, as it gives them a head start.
2. Dig the Right Size Hole
When you plant calla lily rhizomes, dig a hole about 4 inches deep.
Place the rhizome with the pointed side facing up, and space each one about 12 inches apart.
This spacing allows the plants to grow and spread without competing for nutrients, ensuring your calla lily plant outside has room to flourish.
Cover the rhizomes with soil and water them thoroughly right after planting.
3. Watering Your Outdoor Calla Lilies
After you plant a calla lily outside, keep the soil consistently moist but not soaked.
During the growing season, you may need to water daily if you live in a hot, dry area or if you’re growing them in containers outdoors.
A layer of mulch around the base of the plant helps retain moisture and keeps the roots cool.
Once your calla lily plant outside is established, it will be fairly drought-tolerant for short periods, but regular watering will give you the best blooms.
Caring For Your Calla Lily Plant Outside
Once you’ve planted a calla lily outside, the care routine is quite simple and rewarding.
These plants don’t need heavy fertilization, but a light feeding in the spring and mid-summer will promote healthy growth and more flowers.
Use a balanced liquid fertilizer diluted to half strength every few weeks, since too much nitrogen will only encourage leaf growth.
Deadheading spent flowers encourages the plant to put energy into producing new blooms instead of seeds, so keep an eye out for faded flowers.
1. Pest and Disease Considerations
You can plant a calla lily outside with confidence, but be aware of common pests like aphids and spider mites.
If you notice these pests, spray the leaves with a gentle stream of water or use insecticidal soap.
Root rot is the biggest disease risk, which is why proper drainage is crucial when you plant calla lily rhizomes outdoors.
Avoid overwatering and make sure the soil doesn’t stay soggy, especially in cooler weather.
2. Overwintering In Cold Climates
If you’ve planted a calla lily outside in a zone colder than 8, you’ll need to overwinter the rhizomes indoors.
After the first frost has killed the foliage, carefully dig up the rhizomes and let them dry for a few days.
Brush off the excess soil and store them in a cool, dry place in a paper bag or box filled with peat moss.
Keep them at around 50°F (10°C) for the winter, and then you can replant a calla lily outside again the following spring.
So, Can A Calla Lily Plant Be Planted Outside?
A calla lily plant can definitely be planted outside, and it’s one of the best ways to enjoy these stunning flowers in your landscape.
Yes, you can plant a calla lily outside in your garden beds, borders, or even along ponds and water features where they’ll feel right at home.
With the right sunlight, rich moist soil, and a little seasonal care, your outdoor calla lily will produce gorgeous blooms from early summer through fall.
Whether you live in a warm climate where they’re perennial or a cooler zone where you bring them in for winter, planting calla lily plants outside is absolutely worth it.
The elegance they bring to an outdoor space is unmatched, and now you know exactly how to make it happen successfully.