How To Overwinter Caladiums – Preserve Vibrant Foliage For Next Season

As the vibrant hues of summer begin to fade and the crispness of autumn fills the air, many gardeners face a common dilemma: what to do with their beloved tropical plants? Caladiums, with their spectacular, heart-shaped leaves, are undoubtedly showstoppers in any garden.

Unfortunately, these beauties, often known as “elephant ear” relatives or “angel wings,” are tender tropicals, meaning they won’t survive freezing temperatures. Leaving them exposed to winter’s chill in most regions is a sure way to lose them.

But don’t despair! You can easily enjoy your caladiums year after year. Learning how to overwinter caladiums is a simple process that guarantees their return, bringing a splash of color back to your landscape or containers next spring. Let’s dive into saving these gorgeous plants!

Why Overwinter Your Caladiums?

Caladiums (Caladium bicolor) are native to the tropical rainforests of South America, thriving in warm, humid conditions. In their natural habitat, they undergo a natural dormancy period during drier, cooler spells, relying on their underground tubers to survive.

For most of us, this means they are considered annuals or tender perennials outside of USDA Hardiness Zones 9-11. Without intervention, they simply won’t make it through a cold winter.

Overwintering your caladiums is not just about saving money on new plants each spring; it’s also about preserving specific, cherished cultivars. Some varieties are harder to find, and keeping your existing tubers ensures their continued display in your garden.

It’s a rewarding process that connects you more deeply with the plant’s natural life cycle. You’ll gain a greater appreciation for their resilience and beauty.

When to Prepare Your Caladiums for Dormancy

Timing is crucial when preparing your caladiums for their winter rest. The goal is to let the plant naturally signal its readiness for dormancy.

Watch for signs of senescence, which is the natural aging and decline of the foliage. The leaves will start to yellow, droop, and eventually die back, usually in late summer or early fall as temperatures drop and daylight hours shorten.

Ideally, you want to dig them up before the first hard frost hits your area. A light frost might nip the foliage, but a deep freeze can damage the tubers underground.

Check your local forecast and aim to start the process when nighttime temperatures consistently fall below 50°F (10°C) but before they reach freezing.

Step-by-Step Guide: How to Overwinter Caladiums Successfully

There are two primary methods for overwintering caladiums: storing their tubers directly or keeping them in their pots. Both are effective, and your choice may depend on how your caladiums are currently grown.

Method 1: Storing Caladium Tubers

This is the most common and often recommended method, especially for caladiums grown directly in garden beds.

1. Allow Foliage to Die Back Naturally

• Stop fertilizing in late summer to encourage dormancy.
• Reduce watering as the leaves begin to yellow. This helps the plant redirect energy back into the tuber.
• Wait until the foliage has mostly withered and turned brown.

2. Digging Up the Tubers

• Choose a dry day for digging.
• Use a garden fork or spade to carefully loosen the soil around the plant.
• Dig wide and deep enough to avoid damaging the tubers. Caladium tubers can be surprisingly shallow or spread out.
• Gently lift the entire plant from the soil.

3. Cleaning and Curing the Tubers

• Carefully brush off as much soil as possible from the tubers. Do not wash them, as excess moisture can lead to rot.
• Trim any remaining foliage stems back to about an inch from the tuber.
• Place the tubers in a warm, dry, well-ventilated area (around 70-75°F or 21-24°C) for 5-7 days to allow them to “cure.” This process helps dry the outer skin, preventing fungal issues like rhizome rot during storage.

4. Inspecting and Treating (Optional)

• After curing, inspect each tuber for any signs of damage, disease, or soft spots. Discard any that look unhealthy.
• You can dust healthy tubers with a horticultural fungicide powder as an extra precaution against rot, though this is often not strictly necessary with proper curing and storage.

5. Storing the Tubers

• Find a suitable storage medium. Options include dry peat moss, vermiculite, sawdust, or even shredded newspaper. The medium should be slightly moist but not wet.
• Place a layer of your chosen medium in a cardboard box, paper bag, or mesh bag. Avoid airtight plastic containers, as they can trap moisture and promote rot.
• Nestle the tubers in the medium, ensuring they don’t touch each other. Cover them completely with more medium.
• Store the containers in a cool, dark, dry, and frost-free location. An ideal temperature range is between 45-60°F (7-15°C). Basements, unheated closets, or garages (if they don’t freeze) are good options.
• Check on your tubers monthly throughout the winter, looking for any signs of mold, shriveling, or rot. Remove any affected tubers immediately to prevent spread.

Method 2: Keeping Caladiums in Pots

If your caladiums are grown in containers, this method can be even simpler, as it avoids the digging process.

1. Prepare for Dormancy

• As temperatures drop in fall, reduce watering significantly.
• Allow the foliage to naturally yellow and die back.
• Stop all fertilization.

2. Move Indoors

• Once the foliage has withered, bring the entire pot indoors.
• Place the pot in a cool, dark, and dry location, similar to where you would store individual tubers. A basement or a cool, dark closet is perfect.
• Do not water the pot at all during the dormancy period. The soil should remain dry.

3. Monitor

• Periodically check the soil to ensure it remains dry.
• Inspect for any pests or mold, though these are less common when the plant is fully dormant and dry.

Reawakening Your Caladium Tubers in Spring

As the days lengthen and the threat of frost passes in spring, it’s time to bring your caladiums back to life. This usually occurs around March or April, depending on your climate and when you plan to plant them outdoors.

1. Inspect and Prepare

• Carefully remove the tubers from their storage medium.
• Inspect them again for any signs of rot or damage. Discard any soft or mushy tubers.
• Healthy tubers should feel firm and plump.

2. Pre-Sprouting (Optional but Recommended)

• For an earlier start, you can “pre-sprout” tubers indoors about 4-6 weeks before the last expected frost.
• Plant tubers in small pots filled with a sterile, well-draining potting mix. Peat-based mixes work well.
• Plant the tubers “eye-side” up (the bumpy side where sprouts emerge), about 1-2 inches deep.
• Water lightly and place in a warm location (around 70-75°F or 21-24°C) with bright, indirect light.
• Keep the soil consistently moist but not waterlogged.

3. Planting Outdoors

• Once all danger of frost has passed and soil temperatures consistently reach 65°F (18°C) or higher, your caladiums are ready for their summer home.
• If you pre-sprouted, carefully transplant the young plants.
• If planting dormant tubers directly, plant them 1-2 inches deep and about 8-12 inches apart, depending on the cultivar size.
• Choose a location with partial to full shade for most varieties, though some newer cultivars can tolerate more sun.
• Ensure the soil is rich, well-draining, and slightly acidic to neutral (pH 5.5-6.5).
• Water thoroughly after planting and continue to keep the soil consistently moist throughout the growing season.
• Begin feeding with a balanced liquid fertilizer (e.g., a 10-10-10 NPK ratio) every 2-4 weeks once growth is established.

Common Overwintering Challenges and Solutions

Even with the best intentions, you might encounter a few hiccups when you learn how to overwinter caladiums.

Tubers Rotting in Storage

• Cause: Too much moisture, improper curing, poor ventilation, or fungal diseases.
• Solution: Ensure tubers are thoroughly cured and completely dry before storage. Use a breathable storage medium and container. Check storage conditions regularly for humidity. Improve air circulation.

Tubers Shriveling or Drying Out

• Cause: Storage medium is too dry, or storage area is too warm and dry.
• Solution: Ensure your storage medium (like peat moss or saving other stunning blooms) has a slight, barely perceptible dampness. Store in a cooler location with moderate humidity.

No Sprouts in Spring

• Cause: Tuber was too old, rotted, stored too cold, or simply didn’t receive enough warmth and moisture to break dormancy.
• Solution: Check tubers for firmness. Provide consistent warmth (70-75°F) and gentle moisture when trying to reawaken them. Be patient; some tubers take longer to sprout.

Pests in Storage

• Cause: Tubers weren’t thoroughly cleaned, or storage area has existing pests.
• Solution: Ensure all soil and plant debris are removed from tubers. Store in a clean, pest-free environment. Regular checks can catch issues early.

Seasonal Overwintering & Reawakening Checklist

To make the process even smoother, here’s a quick checklist for your caladiums:

Fall Overwintering Checklist

• Late Summer/Early Fall: Stop fertilizing. Reduce watering.
• Before First Hard Frost (or when foliage dies back):
  • Dig up tubers carefully (if in ground).
  • Brush off soil; do not wash.
  • Trim foliage to 1 inch.
  • Cure tubers in a warm, dry, well-ventilated area for 5-7 days.
  • Inspect for damage/disease.
  • Store in peat moss/vermiculite in a cool (45-60°F), dark, dry, breathable container.
• Monthly (Winter): Check stored tubers for rot, shriveling, or pests.

Spring Reawakening Checklist

• 4-6 Weeks Before Last Frost:
  • Retrieve tubers from storage.
  • Inspect for firmness and health.
  • Pre-sprout indoors: plant 1-2 inches deep in sterile potting mix, provide warmth (70-75°F) and bright, indirect light.
  • Keep soil lightly moist.
• After Last Frost (Soil 65°F+):
  • Transplant pre-sprouted plants outdoors or plant dormant tubers directly.
  • Choose partial to full shade.
  • Ensure rich, well-draining soil.
  • Water thoroughly.
  • Begin balanced liquid fertilizer once growth is established.

Frequently Asked Questions About Overwintering Caladiums

Can I Leave Caladiums in the Ground in Warm Zones?

Yes, if you live in USDA Hardiness Zones 9-11, caladiums are typically perennial and can be left in the ground. In zone 8, some gardeners risk it with heavy mulching, but it’s often safer to dig them up or grow them in containers to move indoors. For other delicate plants, consider how to protect your garden broadly.

How Long Do Caladium Tubers Last in Storage?

With proper storage conditions, caladium tubers can remain viable for 2-3 years, sometimes even longer. However, their vigor and sprouting ability may decrease over time, so most gardeners aim to get 1-2 seasons out of them.

What If My Caladiums Don’t Go Dormant?

In very warm climates or if grown indoors year-round, caladiums might not enter a full dormancy. If you wish to force dormancy, gradually reduce watering and stop fertilizing. This will encourage the foliage to die back, allowing the plant to rest. For similar strategies with other container plants, consider preserving potted greenery.

Can I Just Bring My Potted Caladiums Indoors for Winter Without Forcing Dormancy?

While possible, it’s generally not recommended for an extended period. Caladiums need a period of rest. Keeping them actively growing indoors throughout winter often leads to leggy, weak growth due to insufficient light and humidity, and can invite pests. It’s best to allow them to go dormant.

Conclusion

Don’t let the end of summer mean the end of your gorgeous caladium display. By understanding how to overwinter caladiums, you’re not just saving a plant; you’re cultivating a connection to its natural rhythm and ensuring a burst of vibrant color for many seasons to come.

Whether you choose to store tubers or bring pots indoors, the process is straightforward and incredibly rewarding. Follow these steps, and you’ll be well on your way to enjoying these tropical beauties year after year, transforming your garden into a continuous canvas of stunning foliage!

Taylor Galla Founder of Garden Aider

• Mechanical engineer
• Gardening since 2010
• Univ. of Nevada, Reno

From the author's notebook

Taylor pairs an engineer's eye with years of hands-on work in soil, lawns and outdoor machinery. He tests ideas in his own garden, keeps tractors and mowers running himself, and speaks to local horticulture groups. Every Garden Aider guide is written to be practical, accurate and safe to follow.

“To bring life alive, you just need to mix some love with the compost, bedding, and gardening machines.”

Published Sep 24, 2026