100% Pure Seed. No Fillers. Non GMO.
How to Plant Wildflowers
Step by step instructions on how to plant your wildflower seeds.
Find mixtures for your region, or for special uses such as dry areas, partial shade, attracting animals, low growing, and more.
Over 75 choices that will bloom in the second year and for years to come.
Over 110 choices for fast color, such as poppies, cosmos, sunflowers, zinnia, and many more.
Help the birds, bees, butterflies & hummingbirds by planting wildflowers.
Wildflower seeds native to your region. Support local wildlife with native wildflowers.
Free shipping on all packets: No Minimum!
Why buy seed packets for your promotion or event
Final Week to Save 50% - Pre-Order Now
Perennial Planting Guide
Step by step instructions on how to plant your bare root or potted perennials when they arrive.
Fall Flower Bulb Planting Guides
Step by step instructions on how to plant your fall-planted flower bulbs when they arrive.
Let's Do Lawns Differently
Less water, less mowing, and no pesticides
How to plant a cover crop
Learn about varieties which help to replenish nutrients to your soil.
Thrives in areas with cold freezing winters and hot summers.
Thrives in areas with hot temperatures.
Click here to view our General Gardening Guides
Find Out When Your Order Will Ship
We often see the forced blooms of calla lilies in retail stores in the early spring, tempting us into an impulse purchase that usually ends in tears. Consider: Once we’ve taken them home and enjoyed the elegant, sophisticated flowers for a couple of weeks, we take the pots out to the garden with the best of intentions and subsequently lose them to frost. If we are lucky enough to have an early, frost-free spring, the foliage dies back, we assume we’ve lost them and promptly forget about them (only to truly lose them over the winter). Such an experience can put the gardener off from wanting to try to grow Callas at all.
Fortunately, florist cultivation and garden cultivation are two totally different things (and two totally different timelines). As with most plants, understanding the native conditions of Callas can help you grow them successfully as a gardener, and you’ll be enjoying these romantic, exotic blooms on Nature’s schedule in late June or early July.
Calla flowers can come in a huge range of colors from purest white to deepest red. Many people love the exotic look of the almost-black cultivars, and others go for zesty oranges and bright yellows. The arrow-shaped foliage on many of these cultivars is decorative in its own right, displaying varying degrees of almost-translucent spotting on undulating leaves.
The flower of a Calla is actually a half-cone shaped spathe with a pale-yellow to bright-yellow spadix. If all goes well, the flower will set green berry-like fruits that gradually turn red. The seed will not come true from hybrid cultivars, but will be true in species plants.
Species calla such as the white Zantedeschia aethiopica can grow as tall as 2-3 feet. Colorful cultivars are usually shorter (from 12-18”) and generally less hardy. If moisture levels are plentiful, the tall foliage of Z. aethiopica can add a terrific note of the tropics to your borders and beds.
Callas come from marshy habitats in South Africa, and this alerts the gardener to two major points when growing this plant: 1) It needs moisture and lots of it, and; 2) It may suffer from hardiness issues in cooler climates. During the dry season of summer in South Africa, it will often go dormant based on rainfall and moisture levels in soil – and so we must be prepared for this behavior from our plants in the United States.
In general, the colorful hybrid Callas are less hardy and more apt to go dormant quite quickly after blooming. The white species type, Z. aethiopica, can remain evergreen throughout the season in areas where the summer heat is not too punishing and the soil is moist, but still must be dug if winters are very cold.
In some areas, such as the Pacific Northwest, Callas are a regular sight in gardens and along roadside ditches, spreading with abandon and needing the judicious hand of a gardener to pull them. Most of us however don’t have this problem and must overwinter our plants (north of Zone 8).
To do this, either keep individual pots plunged in garden beds for easy removal, or dig the clumps before the first frost. As Callas usually die back in the garden, it’s easy to forget about them. By putting a marker near the clump when in flower, you can help yourself locate them for overwintering.
Keep them just-damp during the winter months to prevent desiccation in an area that stays frost-free. When all danger of frost has passed, the rhizomes can be put outside for a new growing season. Don’t forget to refresh your potting soil and/or garden soil – Callas like a rich environment with plenty of moisture-retaining organics. If a longer growing season is desired, repot earlier in winter and put in a warm (65°F), well-lit spot indoors, keeping well-watered until plants can be set out in the late spring.
As callas are originally a marsh-growing plant, they respond well to marginal, edge of pond situations and within the pond itself, growing in rich soil in a pot weighted with gravel.
The tallest of the callas, Z. aethiopica, is particularly suited to this environment as it can be placed in up to ten inches of water. In some colder areas of the US, this is below the level of ice in the winter and here it can stay. However, it is always safest to overwinter inside or experiment with one outside/one inside if you have any doubts as to hardiness.
Boggy, wet situations can encourage bacterial disease, so keep an eye on your plants growing in pond margins and remove if disease begins to rot foliage or flowers where they meet the soil.
In pots on the deck, think about plunging pots in with other exotic tropicals and sub-tropicals that love moisture such as colocasia and canna. As the summer wears on and their companions begin to outpace them, you can remove the callas, start to withhold moisture and begin their period of dormancy.
Because the soft, half cones of calla are a mainstay of upscale florists and still regarded as an exotic bloom, they lend a touch of sophistication to a garden or a potted container arrangement. Once you’ve mastered matching this plant with the correct growing conditions, you’ll be thrilled by the oohsand ahhs you receive.
You don’t need to let on how easy they were to grow.
About the Author: Marianne Willburn is a columnist, blogger and author of the new book "Big Dreams, Small Garden: Creating Something Extraordinary in Your Ordinary Space." Originally from California, she now gardens in Virginia – read more at www.smalltowngardener.com.
Back to article.
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.
Learn How to Grow Callas