Kansas gardeners should wait until after the last frost to set out calla lilies, typically in late spring. The best time to plant calla lily in kansas is between mid-April and early May, when soil temperatures reach at least 60°F. This timing helps your calla lilies avoid cold damage and grow strong roots before summer heat arrives.
Kansas has a unique climate with hot summers and cold winters. Calla lilies are tender perennials that cannot survive freezing temperatures. Planting them too early risks frost kill, while planting too late means less time for blooms before fall. Getting the timing right is key for a successful display.
Best Time To Plant Calla Lily In Kansas
The exact planting window depends on your location within Kansas. Eastern parts near Kansas City warm up a bit earlier than western areas like Garden City. Generally, the safe zone starts after your area’s average last frost date.
For most of Kansas, the last frost date falls between April 10 and April 25. Check your local extension office for precise dates. Wait one week after that date to plant. This buffer ensures soil is warm enough and no late frost surprises.
Soil temperature matters more than calendar dates. Calla lilies need soil at least 60°F for proper root development. Cold soil causes rhizomes to rot. Use a soil thermometer to check at 4 inches deep before planting.
Understanding Kansas Climate Zones
Kansas spans USDA hardiness zones 5b to 6b. Northern counties like Norton are colder, while southern areas like Winfield are warmer. This affects planting times slightly.
- Zone 5b: Plant in early to mid-May
- Zone 6a: Plant in late April to early May
- Zone 6b: Plant in mid to late April
If you live in a microclimate near a lake or river, adjust by a week. Urban areas with heat islands can plant a few days earlier. Always watch weather forecasts for unexpected cold snaps.
Preparing Your Garden For Calla Lilies
Before planting, prepare your soil. Calla lilies prefer rich, well-draining soil with organic matter. Kansas clay soil needs amending with compost or peat moss to improve drainage.
- Choose a spot with full sun to partial shade. Morning sun with afternoon shade works best in Kansas heat.
- Loosen soil to 12 inches deep. Remove rocks and weeds.
- Mix in 2-3 inches of compost or aged manure.
- Test soil pH. Calla lilies like slightly acidic soil between 6.0 and 6.5.
- Add bone meal for phosphorus to support blooms.
Raised beds are a good option for heavy clay soil. They warm up faster in spring and drain better. This can help you plant a bit earlier if your soil is slow to warm.
Step-By-Step Planting Guide
Follow these steps for best results when planting calla lilies in Kansas.
- Wait until soil temperature reaches 60°F. Check with a thermometer.
- Dig holes 4 inches deep. Space rhizomes 12-18 inches apart.
- Place rhizomes with growing tips facing up. Cover with soil.
- Water thoroughly after planting. Keep soil moist but not soggy.
- Mulch with 2 inches of straw or wood chips to retain moisture and regulate soil temperature.
If you plant in containers, use pots with drainage holes. Container callas can be moved indoors if a late frost threatens. This gives you more flexibility with planting time.
Alternative Planting Methods
Some Kansas gardeners start calla lilies indoors for earlier blooms. This works well if you want flowers by early summer.
Starting Indoors
Begin rhizomes indoors 6-8 weeks before the last frost. Use pots with well-draining potting mix. Keep them in a warm spot around 70°F. Water sparingly until sprouts appear.
Harden off plants gradually over a week before moving outside. Place them outdoors for a few hours each day, increasing time. Transplant after frost danger passes.
Indoor starts give you a head start of 3-4 weeks. You can expect blooms by late June instead of July. This method is popular in northern Kansas where growing seasons are shorter.
Fall Planting Considerations
Calla lilies are not typically planted in fall in Kansas. They cannot survive winter outdoors. If you want to try fall planting, use containers and store them indoors during winter.
Some gardeners dig up rhizomes in fall and store them for spring. This is common for overwintering. Store rhizomes in peat moss in a cool, dark place around 50°F. Replant the following spring after frost danger.
Care After Planting
Once your calla lilies are in the ground, proper care ensures healthy growth and abundant blooms. Kansas summers can be harsh, so attention to watering and feeding is crucial.
Watering Needs
Calla lilies like consistent moisture. Water deeply once or twice a week, depending on rainfall. In hot Kansas summers, you may need to water more often.
- Check soil moisture 2 inches down. If dry, water.
- Water at the base to avoid leaf diseases.
- Reduce watering in late summer as plants go dormant.
Overwatering can cause rhizome rot. Ensure good drainage. If leaves turn yellow, you may be watering too much. Adjust accordingly.
Fertilizing Schedule
Feed calla lilies every 4-6 weeks during the growing season. Use a balanced fertilizer like 10-10-10 or a bloom booster with higher phosphorus.
- Apply fertilizer when planting. Mix into soil.
- Feed again when flower buds appear.
- Stop fertilizing in late August to prepare plants for dormancy.
Liquid fertilizers work well for container plants. Slow-release granules are good for garden beds. Follow package directions for amounts.
Mulching And Weed Control
Mulch helps retain moisture and keep soil cool in Kansas heat. Apply 2-3 inches of organic mulch around plants. Keep mulch away from stems to prevent rot.
Weeds compete for water and nutrients. Remove them regularly. Hand pulling is best to avoid disturbing shallow roots. A layer of mulch also suppresses weed growth.
Common Problems And Solutions
Kansas gardeners face specific challenges with calla lilies. Here are common issues and how to fix them.
Frost Damage
Late frosts can kill tender growth. Cover plants with frost cloth or old sheets if frost is forecast. Remove covers in the morning. Plant in protected areas near buildings or fences.
If frost damages leaves, cut them back. New growth may emerge from the rhizome. Wait and see before digging up plants.
Pests
Slugs and snails love calla lilies in moist Kansas gardens. Use beer traps or diatomaceous earth around plants. Aphids can be washed off with water or treated with insecticidal soap.
Spider mites appear in hot, dry weather. Spray leaves with water to increase humidity. Neem oil works for severe infestations.
Diseases
Root rot is common in heavy clay soil. Improve drainage before planting. Avoid overwatering. If rot occurs, dig up affected rhizomes and discard them.
Leaf spot diseases appear as brown spots on leaves. Remove infected leaves and improve air circulation. Avoid overhead watering.
Harvesting And Overwintering
Calla lilies bloom from summer into early fall. You can cut flowers for arrangements. Harvest when the spathe is fully open but before pollen sheds.
Cutting Flowers
Use clean, sharp shears. Cut stems at an angle. Place in water immediately. Calla lily flowers last up to two weeks in a vase. Change water every few days.
Leave some flowers on the plant to allow foliage to gather energy for next year. This helps rhizomes store nutrients.
Overwintering Rhizomes
In Kansas, calla lilies cannot stay in the ground over winter. Dig up rhizomes after the first frost kills the foliage. Follow these steps:
- Cut back dead leaves to 2 inches above the rhizome.
- Dig carefully to avoid damaging rhizomes.
- Brush off soil. Let dry for a few days in a warm, airy place.
- Store in peat moss or vermiculite in a cool, dark location around 50°F.
- Check monthly for rot or drying. Mist lightly if shriveling.
Replant the following spring after frost danger. Rhizomes can be divided every 3-4 years to increase your stock.
Frequently Asked Questions
Can I plant calla lilies in Kansas in July?
July is too late for outdoor planting. The heat stresses plants, and they may not bloom before frost. Stick to spring planting for best results.
What happens if I plant calla lilies too early in Kansas?
Early planting risks frost kill. Cold soil causes rhizomes to rot. Wait until soil reaches 60°F and frost danger passes.
Do calla lilies come back every year in Kansas?
No, they are not hardy in Kansas winters. You must dig up rhizomes and store them indoors. Replant each spring for annual blooms.
How deep should I plant calla lily rhizomes in Kansas?
Plant 4 inches deep. In heavy clay soil, plant 3 inches deep to avoid rot. Cover with soil and mulch.
Can I grow calla lilies in containers in Kansas?
Yes, containers work well. Use pots with drainage holes. Move them indoors during frost or extreme heat. Water more frequently than garden plants.
Final Tips For Kansas Gardeners
Timing is everything for calla lilies in Kansas. Wait for warm soil and safe frost dates. Prepare your soil well with organic matter. Water consistently but avoid overwatering.
Consider microclimates in your yard. South-facing walls absorb heat and can protect plants. North sides stay cooler and may delay growth. Observe your garden’s patterns.
Experiment with different varieties. Some calla lilies bloom earlier than others. ‘Crystal Blush’ and ‘Flame’ are reliable choices for Kansas. Check with local nurseries for recommendations.
Join a local gardening group. Other Kansas gardeners can share tips specific to your area. The Kansas State University Extension office offers free resources and soil testing.
With proper timing and care, your calla lilies will thrive in Kansas. Enjoy their elegant blooms from summer through early fall. Remember to dig them up before winter for next year’s display.