How to Care for Calla Lilies

Updated on July 21, 2018
Diane Lockridge profile image

Lockridge is an avid reader who enjoys learning about beautiful things in the garden. Among other things, she has worked with a florist.

Background

Although traditionally thought of as white, calla lilies are available in a variety of colors. The structure we normally associate as the calla lily isn’t really a flower. The “bloom “of the calla lily is a modified leaf, not a weirdly shaped flowerer petal. True lilies have true flower petals produced on long, leafy stalks.

Calla lilies stand 1 to 3 feet high and are about 1 to 1 ½ feet white at full maturity. Dark green arrow-shaped leaves surround the spathe (the flower-like structure) and spadix (the stigma-like structure).

How to Plant in a Container

Calla lilies aren’t grown from seeds they grow from a rhizome.

  1. Moisten potting mix with warm water until the texture is moist but not soggy. Use your hand to distribute the moisture evenly.
  2. Add moistened potting mix to your pot until it is about 2/3 full.
  3. Push the rhizome slightly into the soil with the pointy side up. Cover the rhizome with the remaining moistened potting mix, and water thoroughly. Rhizomes should be placed no more than 3 inches deep.
  4. Place the pot in a warm location, and keep soil soggy. Consider placing the pot on a saucer of water to keep moisture levels constantly high.
  5. Place the pot in a sunny location (preferably south-facing window).
  6. Expect the plant to bloom 8 to 16 weeks after potting.
  7. Move the plant outdoors to a full-sun location.
  8. When the foliage fades, stop watering, and cut back to just above the soil level. Calla Lilies requite a period of dormancy.
  9. Bring indoors before any frosts.

How to Keep Callas Outdoors in Pots

Callas prefer high moisture levels with full sun. Wait until all danger of frost has past before planting the calla outdoors in pots. Although calla lilies can be left in the container over winter, you should but bring the container indoors, and stop watering it until you want to start growing it again in the spring.

Dig rhizomes up before threat of frost. Shake off excess soil, and allow the rhizome to dry off for a few days before store it indoors in sand or dry peat moss in a cool location.

Considerations

Calla lily “blooms” sometimes turn green and roll up into a tube after they have had a spectacular show of color. Although alarming, this is not unusual, and is actually a part of the normal maturation life cycle.

The bloom turns green when the plant starts to focus energy on the leaves and fuel up for the next season’s growth.

When the flowers turn green and limp, cut the stems back with sterilized scissors and clip the stem near the base.

Unlike any other plants, deadheading calla lilies won’t encourage new growth. Your plant won’t bloom again, but the overall plant will look great.

How to Care for Fresh-Cut Flowers

Handle calla lilies carefully because they can bruise easily. Store your bouquet out of direct sunlight in a cool location; avoid drafty areas.

Calla lilies love water, so you’ll need to monitor water levels often. Refresh the stems of your calla lilies about every three days. Using sterilized scissors, cut at a 45-degree angle to encourage better water absorption.

Change the water, and add flower food or one teaspoon of sugar and two drops of liquid bleach.

Helpful Tips

Plant the lilies about 1 foot apart to ensure the plant has adequate room to grow.

Calla lily roots are poisonous if ingested, so take precautions if you have children or pets around.

Fertilize calla lilies monthly to ensure a healthy plant, but avoid fertilizers with too much nitrogen, which can cause the bloom to droop.

If your calla lily starts to droop monitor water levels closely, it just may be thirsty. Avoid adding too much water to limit the chance of root rot.

Questions & Answers

  • Can I separate my calla lilies after blooming? If so, how do I do It?

    It is best to separate calla lilies in the late winter/early spring (after danger of frost has passed) or in the late summer/early fall (when the plant has finished blooming). Watch the last video on this article for an example of how to separate the calla lilies. It really is as simple as popping the plant out of the pot, pulling the plant apart, and removing excess soil from the tuber.

  • Can calla lilies be planted outside and left there through the winter?

    Winter care for calla lilies really depends upon your climate. If you live in USDA hardiness zone 8 or higher, you should be fine to just apply a mulch over the area to help keep the soil warmer. Gardners in hardiness zones 7 or lower should remove the bulbs for winterizing.

  • Will Calla lilies live happily in Japan (the hotter part)?

    I don't have any experience growing Calla lilies (or any plant) internationally, but this website on growing plants in Japan seemed to have some helpful tips:

    http://www.mygardeninjapan.com/p/search-my-little-...

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