Transform Your Garden: What to Do with a Calla Lily in the Fall

The vibrant trumpet-shaped blooms of calla lilies are a welcome sight throughout the summer months. But what happens to these elegant plants when fall arrives? The question of what to do with a calla lily in the fall is one that many gardeners find themselves asking. This guide will walk you through the essential steps to ensure your calla lilies thrive through autumn and are ready to grace your garden again next spring.

Understanding Calla Lily’s Fall Transition

Calla lilies, also known as Zantedeschia, are generally considered to be hardy in zones 8-10. These plants prefer warm temperatures and moist soil, making them a perfect fit for summer gardens. However, as the weather cools down and the days shorten, these tropical beauties begin to enter a period of dormancy.

Step-by-Step Guide: Calla Lily Fall Care

1. Monitor for Signs of Dormancy:

• Leaf Yellowing: One of the first signs that your calla lily is preparing for dormancy is the yellowing and wilting of its leaves. This is a natural process as the plant redirects energy to its underground tubers.
• Reduced Growth: You’ll also notice a slowdown in growth, with new blooms becoming less frequent.

2. Gradually Reduce Watering:

• Watering Schedule: As the weather cools, gradually reduce the frequency of watering. The goal is to allow the soil to dry out slightly between waterings. This helps to encourage the tubers to enter dormancy.
• Avoid Overwatering: Overwatering during this period can lead to root rot, which can damage the tubers and prevent them from re-emerging in the spring.

3. Prepare for Winter Protection (Zones 7 and Below):

• Mulch: If you live in a region with colder winters (zones 7 and below), it’s crucial to protect your calla lily tubers from freezing temperatures. Apply a thick layer of mulch (around 4-6 inches) over the planting area. This will insulate the tubers and help them survive the winter.
• Winter Protection: In colder climates, consider bringing your potted calla lilies indoors for the winter. Place them in a cool, dark location, such as a basement or garage, and water them sparingly.

4. Digging and Storing Tubers (Zones 6 and Below):

• Timing: In regions with very cold winters (zones 6 and below), it’s best to dig up the tubers in the fall before the first frost.
• Digging: Once the foliage has died back completely, carefully dig up the tubers with a garden fork.
• Cleaning and Drying: Brush off any excess soil and allow the tubers to dry thoroughly in a cool, dry place.
• Storage: Store the tubers in a cool, dark, and well-ventilated area, such as a basement or garage. Place them in a paper bag or cardboard box filled with peat moss or vermiculite to prevent them from drying out.

Calla Lily Care After Dormancy (Spring)

• Repotting: If you stored your tubers indoors, repot them in fresh potting mix in the spring.
• Planting: Once the last frost has passed, you can plant your calla lily tubers outdoors. Choose a location that receives partial shade and has well-drained soil.
• Watering: Water your calla lilies regularly, especially during dry periods.
• Fertilizing: Fertilize your calla lilies every few weeks with a balanced fertilizer to promote healthy growth.

Tips for a Successful Fall Transition

• Avoid Late-Season Fertilizers: Avoid applying high-nitrogen fertilizers in the fall, as this can encourage new growth and make the tubers more susceptible to frost damage.
• Watch for Pests and Diseases: Keep an eye out for any signs of pests or diseases. Treat any problems promptly to prevent them from spreading.
• Stay Patient: Remember that the transition into dormancy is a natural process for calla lilies. Be patient and allow the plant to follow its natural cycle.

Beyond the Basics: Troubleshooting Calla Lily Problems in Fall

1. Yellowing Leaves: While yellowing leaves are a natural sign of dormancy, premature yellowing could indicate overwatering, nutrient deficiencies, or pest infestations.

• Solution: Adjust your watering schedule, ensure proper drainage, and check for pests.

2. Stunted Growth: If your calla lily isn’t growing as vigorously as it should, it could be due to insufficient sunlight, poor soil quality, or lack of nutrients.

• Solution: Ensure your calla lily is planted in a location that receives at least 4 hours of sunlight per day. Amend the soil with compost or other organic matter to improve drainage and nutrient content.

3. Pest Infestations: Calla lilies can be susceptible to pests such as aphids, mealybugs, and spider mites.

• Solution: Monitor your plants regularly for signs of infestation. Use insecticidal soap or neem oil to control pests.

Calla Lily Care: A Final Thought

By following these simple steps, you can ensure your calla lilies enjoy a healthy transition into dormancy and emerge ready to bloom again in the spring. Remember, patience and observation are key to successful calla lily care.

Top Questions Asked

1. Can I leave my calla lily tubers in the ground over winter?

• In zones 8-10, you can leave your calla lily tubers in the ground over winter. However, in colder zones, you’ll need to dig them up and store them indoors.

2. What happens if I don’t dig up my calla lily tubers?

• If you don’t dig up your calla lily tubers in colder climates, they are likely to freeze and die.

3. Can I fertilize my calla lily during dormancy?

• It’s not recommended to fertilize your calla lily during dormancy. The plant is resting and doesn’t need additional nutrients.

4. When should I start watering my calla lily again in the spring?

• You can start watering your calla lily again in the spring when you see new growth emerging from the soil.

5. How can I prevent my calla lily from getting diseases?

• To prevent diseases, ensure your calla lily has good air circulation, avoid overwatering, and remove any diseased leaves or stems promptly.