How To Grow White Calla Lilies

To grow white calla lilies, you need to provide them with moist soil, partial sunlight, and a period of dormancy, making them surprisingly easy to cultivate.
 
If you’ve been wondering how to grow white calla lilies successfully, the secret lies in mimicking their natural South African habitat.
 
You can grow white calla lilies both outdoors in garden beds and indoors in containers, as long as you get the basics right.
 
In this post, we’ll cover everything you need to know about how to grow white calla lilies, from planting the rhizomes to overwintering them.
 
Let’s dig into the details so your white calla lilies thrive and bloom beautifully.
 

How to Grow White Calla Lilies: The Core Requirements

When you learn how to grow white calla lilies, the first thing to understand is that they are not true lilies at all, but rhizomatous plants.
 
These elegant white calla lilies thrive when you replicate their preferred conditions of warmth, moisture, and good drainage.
 
Here are the essential factors to master for growing white calla lilies.
 

1. Choose the Right Planting Time for White Calla Lilies

The best time to plant white calla lilies is in early spring after the last frost has passed.
 
You should plant white calla lilies when the soil temperature has warmed to at least 60°F (15°C).
 
If you’re growing white calla lilies in containers, you can start them indoors about two months before the final frost.
 
This early start gives your white calla lilies a longer growing season, which means more flowers.
 
You can also plant white calla lilies in late summer for a fall bloom in warmer climates.
 

2. Pick the Perfect Location for White Calla Lilies

White calla lilies prefer full sun in cool climates but appreciate partial shade in hot afternoon regions.
 
When you grow white calla lilies, aim for a spot that receives at least six hours of morning sunlight.
 
Too much intense heat can stress your white calla lilies and cause their leaves to yellow.
 
The ideal spot for white calla lilies also offers shelter from strong winds, which can damage their tall flower stalks.
 
You can easily grow white calla lilies in pots and move them to the perfect spot as the sun shifts.
 

3. Prepare the Soil for Growing White Calla Lilies

To grow white calla lilies successfully, you need rich, well-draining soil that holds moisture without becoming waterlogged.
 
A slightly acidic to neutral pH between 6.0 and 7.0 is perfect for white calla lilies.
 
Amend heavy clay soil with compost or peat moss to improve drainage before planting white calla lilies.
 
If you’re growing white calla lilies in containers, use a high-quality potting mix with added perlite.
 
Good drainage is non-negotiable for white calla lilies because soggy roots will rot quickly.
 

4. Plant the Rhizomes Correctly for White Calla Lilies

When you plant white calla lilies, place the rhizomes about 4 inches deep with the growing tips facing upward.
 
Space each rhizome roughly 12 to 18 inches apart so your white calla lilies have room to spread.
 
For container-grown white calla lilies, you can plant them slightly closer, about 6 inches apart.
 
Water thoroughly after planting white calla lilies to settle the soil around the rhizomes.
 
Then, keep the soil consistently moist but never soggy while your white calla lilies establish themselves.
 

Caring for White Calla Lilies Throughout the Season

Once your white calla lilies are planted, ongoing care is straightforward and highly rewarding.
 
To keep your white calla lilies blooming from early summer to the first frost, follow these simple routines.
 

1. Watering Your White Calla Lilies

White calla lilies love moisture, so you should water them deeply at least once a week.
 
During hot, dry spells, you may need to water your white calla lilies more frequently to keep the soil damp.
 
However, you should never let your white calla lilies sit in standing water, as this causes root rot.
 
A layer of organic mulch around your white calla lilies helps retain soil moisture and keeps roots cool.
 
Check the top inch of soil; if it feels dry, it’s time to water your white calla lilies again.
 

2. Fertilizing White Calla Lilies

Feed your white calla lilies with a balanced liquid fertilizer every two to three weeks during the growing season.
 
A fertilizer with an N-P-K ratio like 10-10-10 works wonderfully for white calla lilies.
 
Avoid high-nitrogen fertilizers, which encourage lush leaves at the expense of flowers on your white calla lilies.
 
Stop fertilizing your white calla lilies once blooming finishes and the foliage starts to die back.
 
This signals your white calla lilies to prepare for their dormant period.
 

3. Managing Pests and Diseases on White Calla Lilies

White calla lilies are generally resilient, but they can attract aphids, spider mites, and slugs.
 
You can control these pests on your white calla lilies with a strong spray of water or insecticidal soap.
 
Diseases like root rot and bacterial soft rot occur when you overwater white calla lilies.
 
Ensure proper spacing and drainage to keep your white calla lilies healthy and disease-free.
 
Remove any damaged leaves promptly to prevent fungal issues from spreading on your white calla lilies.
 

Overwintering and Dormancy for White Calla Lilies

Learning how to grow white calla lilies includes knowing how to handle them when winter approaches.
 
White calla lilies are tender perennials that need protection in regions with freezing temperatures.
 

1. Digging Up Rhizomes of White Calla Lilies

After the first fall frost, cut back the foliage of your white calla lilies to about 2 inches above the ground.
 
Carefully dig up the rhizomes of your white calla lilies and shake off excess soil.
 
Let the rhizomes dry in a warm, airy location for a few days before storing them.
 
Once dry, place your white calla lilies’ rhizomes in a box filled with peat moss or sawdust.
 
Store them in a cool, dark place around 50°F (10°C), and check periodically for any rot or shriveling.
 

2. Overwintering Container White Calla Lilies

If you grew your white calla lilies in pots, you can simply move the entire container to a frost-free area.
 
Water sparingly during winter so the soil doesn’t completely dry out but stays almost dry.
 
Your white calla lilies will rest and store energy for the next spring’s growth.
 
In early spring, resume watering and place the container back in a sunny spot to wake up your white calla lilies.
 
This dormancy is crucial for the long-term health and blooming of your white calla lilies.
 

So, How to Grow White Calla Lilies Successfully?

To grow white calla lilies successfully, you must provide them with consistent moisture, well-drained soil, and proper winter storage.
 
By following the steps above, you can grow white calla lilies that produce stunning, trumpet-shaped white blooms year after year.
 
Remember that how to grow white calla lilies isn’t complicated, but it does require attention to their seasonal cycles.
 
Start with quality rhizomes, plant at the right depth, and never let them dry out completely during active growth.
 
With a little patience, growing white calla lilies will become one of the most rewarding parts of your gardening routine.
 
Enjoy the elegant, pure white flowers that make these calla lilies a timeless favorite in any garden.