How to Store Lily Bulbs for Next Season

1. Understanding Lily Bulb Dormancy

Lily bulbs naturally enter a dormant phase after flowering, which is crucial for their survival and regrowth. During this period, the bulb conserves energy and prepares for the next growing season. Proper storage mimics the bulb's natural environment, ensuring it remains healthy until replanting. Dormancy typically begins in late autumn when temperatures drop, signaling the bulb to slow its metabolic activity.

2. Timing for Digging Up Lily Bulbs

The ideal time to dig up lily bulbs is after the foliage has yellowed and died back, usually in late fall. This indicates the bulb has absorbed sufficient nutrients and entered dormancy. Avoid digging too early, as the bulb may not have stored enough energy for the next season. Conversely, leaving bulbs in soggy or freezing soil can cause rot or damage.

3. Cleaning and Preparing Bulbs for Storage

After digging, gently brush off excess soil but avoid washing the bulbs, as moisture can promote fungal growth. Inspect each bulb for signs of disease or damage, discarding any that are soft, moldy, or infested. Trim remaining stems to about 2–3 inches to prevent rot. Allow the bulbs to air-dry in a shaded, well-ventilated area for 1–2 days to toughen the outer scales.

4. Choosing the Right Storage Medium

Lily bulbs require a breathable, slightly moist storage medium to prevent desiccation or rot. Suitable options include:

• Peat moss or vermiculite: Retains slight moisture while allowing airflow.
• Wood shavings or sawdust: Provides insulation and absorbs excess moisture.
• Perlite or sand: Ideal for drier climates to prevent dehydration.

Place bulbs in a single layer within the medium, ensuring they do not touch each other to avoid mold spread.

5. Optimal Storage Conditions

Lily bulbs thrive in cool, dark, and humid conditions during storage. Key factors include:

• Temperature: Maintain 35–50°F (2–10°C). Avoid freezing or warm temperatures, which can trigger premature growth or rot.
• Humidity: Aim for 50–70% humidity. Too dry conditions cause shriveling; too damp encourages mold.
• Ventilation: Use mesh bags, cardboard boxes, or crates to allow air circulation.

Basements, garages, or refrigerators (without ethylene-producing fruits) are common storage locations.

6. Monitoring Bulbs During Storage

Check bulbs monthly for signs of rot, mold, or dehydration. Remove any deteriorating bulbs immediately to protect others. If bulbs appear shriveled, lightly mist the storage medium with water. Conversely, if mold develops, reduce humidity and increase ventilation.

7. Preparing Bulbs for Replanting

As the planting season approaches (early spring or fall, depending on climate), inspect bulbs again. Healthy bulbs should be firm and plump. Soak them in water for 1–2 hours before planting to rehydrate. Plant in well-draining soil with adequate sunlight, ensuring the roots are spread out and the bulb is buried at a depth three times its height.

8. Special Considerations for Different Lily Types

Some lilies, like Asiatic or Oriental hybrids, may require slight adjustments:

• Asiatic lilies: Tolerate drier storage but are prone to dehydration.
• Oriental lilies: Need higher humidity due to thicker scales.
• Trumpet lilies: Benefit from cooler storage temperatures.

Adjust storage practices based on the specific variety’s needs.