Store Calla Lily Bulbs: A Comprehensive Guide to Preservation

Calla lilies, with their elegant trumpet-shaped blooms, are a popular choice for gardens and floral arrangements. To ensure the best results next season, proper storage of their bulbs is crucial. Here’s a comprehensive guide to help you preserve your calla lily bulbs effectively.

Bulb Preparation

Before storing calla lily bulbs, prepare them by:

1. Harvesting:

• Dig up the bulbs when leaves start to yellow and die back (late summer or early fall).
• Gently remove soil from the bulbs and cut off any remaining stems.

2. Cleaning:

• Rinse the bulbs with water to remove any remaining soil or debris.
• Do not use detergents or bleach.

3. Drying:

• Place the bulbs in a well-ventilated, shaded area away from direct sunlight.
• Allow them to dry for several days or until the outer skin feels papery.

Storage Methods

Once prepared, you can choose one of the following methods to store calla lily bulbs:

1. Peat Moss

• Fill a breathable container (e.g., cardboard box or mesh bag) with slightly moist peat moss.
• Place the bulbs into the moss, ensuring they are not touching.
• Store in a cool (40-50°F), dark location with good ventilation.

2. Perlite or Vermiculite

• Use clean perlite or vermiculite as the storage medium in a breathable container.
• Plant the bulbs into the material, leaving the top third exposed.
• Keep the material slightly moist and store in a cool, dark place.

3. Paper or Newspaper

• Wrap individual bulbs in newspaper or plain paper.
• Place the wrapped bulbs in a box or crate with air holes.
• Store in a cool, dark, well-ventilated area.

Storage Temperature and Humidity

Maintaining the proper storage temperature and humidity is essential for successful bulb preservation:

1. Temperature:

Store calla lily bulbs in a cool, dark location between 40-50°F (4-10°C). Avoid freezing temperatures or extreme heat.

2. Humidity:

The storage medium should be slightly moist but not soggy. Check occasionally and adjust moisture levels as needed. Avoid excessive moisture that can lead to rot.

Additional Tips

• Inspect bulbs regularly during storage and remove any that show signs of rot or damage.
• Avoid storing calla lily bulbs near ethylene-producing fruits or vegetables, such as apples or bananas.
• Do not store bulbs in plastic bags as they can trap moisture and promote rot.
• Calla lily bulbs can be stored for up to six months under optimal conditions.
• Before planting in spring, “chit” the bulbs by placing them in a warm, moist environment to stimulate root and sprout growth before planting.

Troubleshooting

By following these guidelines, you can effectively store your calla lily bulbs and enjoy vibrant blooms in the next growing season.