How to Grow Callas

calla close upcalla close up

Calla blooms are romantic blooms. Maybe it’s the soft, elegant lines of the tender half cones, or maybe it’s just because a bunch of these expensive flowers means somebody really cares about you; but there is no doubt that callas lend an air of exotic romance to the florist’s vase.

Gardeners are just as capable of adding that allure to their gardens if they pay attention to the native environment of Callas, which hail from the warmer, wetter regions of South Africa.

Protect them from frost, give them a constantly moist spot, and then dig and overwinter them if you’re in a growing zone north of Zone 8, and you too will be able to make your own romance in the garden in a range of colors from passionate red to purest white.

When & Where to Plant Callas

Plant rhizomes of callas in the late spring, when danger of frost is plant, covering with 1-2 inches of rich, humusy potting soil.

Select a part-shade spot in an area that benefits from constantly moist soil such as the edge of a pond, or in a container water feature. If planting in pots, use an organically-rich potting soil that drains well but retains moisture.

In zones where it can overwinter, such as in the Pacific Northwest, the white species type (Zantedeschia aethiopica) will not only spread but can be considered a bit of a pest. Unless dug in colder zones, it will perish when the temperatures plunge and must be brought inside. Growth is significantly lessened in this case.

Light: A partly-shaded spot is ideal, as too much direct sun on leaves and flowers can burn them. However, the plant needs light to bloom well, so deep shade is not a good option.

calla lilycalla lily
<a href="/flower-bulbs/calla-lily-flower-bulbs/calla-lily-bulbs-purple-rain-mix">Calla Lily Purple Rain Mix</a>

Soil: Callas need organically-rich, heavily fertile soil that is on the moist side to thrive. Average moist soils will also be tolerated, but dry soils will not.

Spacing: Space rhizomes 4-6” apart when planting a clump together, and space 12-18” away from other plants. If planting in pots, plant 2-3 rhizomes per 10-inch pot, or one per 6 inch pot.

Planting: Plant in spring when all chance of frost is over and nights have warmed. If you have a greenhouse or warm, well-lit area in your home, you can start the rhizomes earlier to put out plants in full growth when nights are warm.

calla lily tuberscalla lily tubers
Calla Lily tubers will have two sides. The one here is the rounded side
calla tubercalla tuber
The other side of the Calla tuber will have "eyes" as is shown here. Plant tubers with "eyes" facing upwards
calla tuber in soilcalla tuber in soil
Plant Calla Lily tubers 1" to 2" below soil line

How to Grow Callas Throughout the Season

Growth Habit: Species Calla such as Z. aethiopica can grow as tall as 2-3 feet, with shiny, undulating leaves that resemble large arrows. The flower is an arum type bloom that consists of a spathe – usually in white - and a yellow spadix. Colorful cultivars in shades from yellow to almost black to deep red are usually shorter (from 12-18”) and less hardy, with variations in foliage stippling. In warm climates, Callas will spread into large clumps, in colder climates they must be treated like an annual or dug and overwintered indoors.

Staking: No staking is necessary.

Watering: Watering is crucial when it comes to Callas. Keep them moist from the time they are planted until after they bloom and start to die back, when you can gradually withhold water. In dormancy during the late fall/winter months they should be kept just damp to prevent desiccation.

Fertilizing: Fat, rich soil is preferred when it comes to Callas. Plant in a compost-rich soil and feed with a balanced slow release organic fertilizer during the growing season.

Mulching: Mulch can help retain moisture in the soil, and is therefore recommended. Keep mulch away from the crown of the plant to discourage rot.

  1. White Florist Calla Lily, Zantedeschia aethiopica, Florist Calla Lily

    'White Florist' Calla Lily is the original Calla from South Africa, where it made its home in the wet soils of stream banks. Here, it's famous for its pristine, white blossoms that a...

    Learn More
    White Florist Calla Lily White Florist Calla Lily Zantedeschia aethiopica
    As low as $16.98 Sale $8.49
    Per Bag of 1
    'White Florist' Calla Lily is the original Calla from South Africa, where it made its home in the wet soils of stream banks. Here, it's famous for its pristine, white blossoms that are taller than other callas, at up to 3'. The perfectly-fluted flowers are an essential addition to bouquets. Plant 'White Florist' in a big pot on your patio, give it plenty of water and stand back! (Zantedeschia aethiopica)
    Learn More
  2. Orange Calla Lily Bulb Flame, Zantedeschia, Calla Lily

    'Flame' Calla Lily has fiery orange, fluted blooms with deep red edges and playful, speckled foliage. Though they're mostly known as 'market' bouquet flowers, callas can be used as u...

    Learn More
    Flame Calla Lily Flame Calla Lily Zantedeschia Flame
    $14.98 Sale $7.49
    Per Bag of 1
    'Flame' Calla Lily has fiery orange, fluted blooms with deep red edges and playful, speckled foliage. Though they're mostly known as 'market' bouquet flowers, callas can be used as unexpected companions in the perennial garden. Try 'Flame' tucked in front of other summer favorites, like dark-blooming dahlias and spiky liatris. (Zantedeschia)
    Learn More
  3. Calla Lily Bulb Picasso

    A unique bicolor Calla Lily, 'Picasso' is truly a delight to check in with, as the creamy white flowers open up to reveal stunning violet centers. Beautiful in bouquets, be sure to i...

    Learn More
    Picasso® Calla Lily Picasso® Calla Lily Zantedeschia Picasso®
    As low as $14.98 Sale $9.74
    Per Bag of 1
    A unique bicolor Calla Lily, 'Picasso' is truly a delight to check in with, as the creamy white flowers open up to reveal stunning violet centers. Beautiful in bouquets, be sure to include a piece of its charming, spotted foliage. Easy to grow and deer resistant. (Zantedeschia)
    Learn More
  4. Calla Bouquet Collection

    Our Calla Bouquet Collection features a selection of florist favorites with magnificent curved blooms in romantic white, pink, and pale purple. Calla lilies are unmistakable and are ...

    Learn More
    Calla Bouquet Collection Calla Lily Zantedeschia
    $98.86 Sale $64.26
    Per Collection of 7
    Our Calla Bouquet Collection features a selection of florist favorites with magnificent curved blooms in romantic white, pink, and pale purple. Calla lilies are unmistakable and are beloved for elegant flower bouquets. Grow in full sun to part shade and expect abundant flowering throughout the summer – an excellent choice for containers and locations where you can admire your Calla Lilies up close. Plant plenty of these deer resistant, rabbit resistant, and easy to grow flowers for a garden overflowing with classic beauty. Collection of 7 plants.
    Learn More
  5. Red Alert Calla Lily, Zantedeschia

    The fire-engine red cones of Red Alert Calla Lily are softly mottled with orange flecks and surround an orange spadix. Wide, spotted foliage makes a perfect foil for the flowers of t...

    Learn More
    Red Alert Calla Lily Red Alert Calla Lily Zantedeschia
    $14.98 Sale $7.49
    Per Bag of 1
    The fire-engine red cones of Red Alert Calla Lily are softly mottled with orange flecks and surround an orange spadix. Wide, spotted foliage makes a perfect foil for the flowers of this stunning cultivar. Blooming in early summer, Red Alert Calla Lily will grow in full sun, but prefers to be sheltered from afternoon sun in areas in zones 7-11. Moisture lover. Great cut flower. (Zantedeschia)
    Learn More
  6. Yellow Calla Lily Bulb Best Gold, Zantedeschia rehmannii violacea, Calla Lily

    'Best Gold' Calla Lily brings rich, yellow blooms and plenty of elegance to the summer garden. Flowering from the middle of the season into fall, find a spot in the perennial bed to ...

    Learn More
    Best Gold Calla Lily Best Gold Calla Lily Zantedeschia rehmannii violacea Best Gold
    $13.98 Sale $6.99
    Per Bag of 1
    'Best Gold' Calla Lily brings rich, yellow blooms and plenty of elegance to the summer garden. Flowering from the middle of the season into fall, find a spot in the perennial bed to let 'Best Gold' fill in any gaps that could use a punch of cheerful yellow. Deer resistant and a bouquet favorite. (Zantedeschia)
    Learn More
  7. ‘Captain Violetta’ Calla Lily, Zantedeschia Captain Violetta

    ‘Captain Violetta’ Calla Lily charms with violet-pink cones that are touchably soft and temptingly exotic! As a cut flower, ‘Captain Violetta’ is a favorite of florists and h...

    Learn More
    Captain Violetta® Calla Lily Captain Violetta® Calla Lily Zantedeschia Captain Violetta®
    $12.98 Sale $9.74
    Per Bag of 1
    ‘Captain Violetta’ Calla Lily charms with violet-pink cones that are touchably soft and temptingly exotic! As a cut flower, ‘Captain Violetta’ is a favorite of florists and home gardeners alike, with several flowers growing from each rhizome for summer blooms. These deer-resistant flowers and deep green foliage are particularly well suited to container culture, or near water features to match their love of moisture and rich soil. Let the soft violet cones of ‘Captain Violetta’ Calla Lily bring easy elegance to your early summer garden and flower bouquets! (Zantedeschia)
    Learn More
  8. Red and Orange Calla Lily Bulbs Tequila Sunrise Mix, Zantedeschia, Calla Lily

    Deer resistant and extremely easy to grow, the Tequila Sunrise Calla Lily mix adds elegant, bright color to the summer landscape. Blooming in reds, oranges, and yellows, this mixture...

    Learn More
    Tequila Sunrise Calla Lily Mix Tequila Sunrise Calla Lily Mix Zantedeschia Tequila Sunrise Mix
    $34.98 Sale $22.74
    Per Bag of 3
    Deer resistant and extremely easy to grow, the Tequila Sunrise Calla Lily mix adds elegant, bright color to the summer landscape. Blooming in reds, oranges, and yellows, this mixture makes a bold statement both in the garden and cut for summer bouquets. (Zantedeschia)
    Learn More

Callas: End of Season Care

Generally, the white species Calla are hardy to Zone 8, and foliage will remain green after flowering, to die back as days get colder or soils get drier. Many of the colorful hybrids are not as hardy and enter a period of dormancy after flowering.

calla lily flamecalla lily flame
<a href="/flower-bulbs/calla-lily-flower-bulbs/calla-lily-bulbs-flame">Calla Lily Flame</a>
If you live in a colder region, dig your Callas and bring them inside, storing somewhere where temperatures are above freezing.

Trimming & Pruning: Calla will not re-bloom if deadheaded (spent blooms trimmed off), but old blossoms will disfigure foliage as they die back, so removing them is recommended. Many of the colorful Calla cultivars will go dormant not long after flowering.

Dividing & Transplanting: If dividing larger clumps of Calla in warmer climates, dig the clumps and gently pull them apart. Use a sharp knife to divide them and replant. If dividing smaller, overwintered pots, look for offsets in the winter or early spring, cut them apart and let the cuts callus to prevent rot. Pot them up in rich soil in the spring so they can be monitored and set out in the garden when they get bigger.

Pests & Disease: Thrips can be an issue with Callas, as can several types of bacteria rot which will affect the rhizome and the crown of the plant. Infected plants must be discarded. Fresh, clean potting soil is recommended to prevent problems with disease, as is using clean, sharp knives to divide rhizomes and letting them callus over before replanting.

Additional Concerns: In warm climates (Zones 9-11) species Calla (white) will vigorously spread via seeds and rhizomes. All parts of Calla lilies are poisonous, and the sap can cause contact dermatitis in some people.


Callas: Extra Info

Design Advice: Callas make a wonderful accent for a pond garden, thriving in the marginal space between dry land and water, but can also be used within the pond itself, adding an exotic feel to water gardens.

Sink smaller pots of red callas into larger pots which contain the canna lily ‘Pretoria’ – setting off the deep red blooms of the Calla with the variegated yellow-green foliage of the canna. As the callas go dormant (after blooming), you can pull them, store them, and replace with shade-blooming annuals like begonias.

In warmer climates, use the taller species of Calla in unexpected places such as tucked into the corner of a wall or near a downspout where moisture is trapped and/or abundant. The background of the house or wall will set off the lovely, unusual foliage, and give them a boundary against which to grow.


To learn more about the plants we sell and how to grow them in your garden beds and patio containers, sign up for our inspiring emails.

© 2019 AmericanMeadows.com All rights reserved