Twin-scaling is an effective method for propagating Galanthus (snowdrops), especially for increasing the number of rare or valuable varieties. This technique involves cutting the bulb into sections to stimulate the production of new bulblets. Here’s how to do it step by step:

Materials Needed

• Healthy Galanthus bulbs
• Sharp, sterilized knife or scalpel
• Fungicide powder (optional but recommended)
• Sealable plastic bags
• Vermiculite or perlite
• Label and marker

Step 1: Bulb Selection

Choose healthy, mature Galanthus bulbs after the foliage has died back, typically in late spring to early summer when the bulbs are dormant.

Step 2: Cleaning and Drying

Gently clean the bulbs to remove soil and any debris. Allow them to air-dry to minimize the risk of fungal infections during the process.

Step 3: Sterilization

Sterilize your cutting tool with alcohol or a flame to prevent the introduction of pathogens.

Step 4: Cutting the Bulb

• a. Cut the bottom third of the bulb off, where the roots grow, and discard it. This part does not contain the necessary tissues for regeneration.
• b. Slice the remaining two-thirds of the bulb vertically through the center to create two halves.
• c. Further cut each half into 2-3 sections, ensuring each piece includes a part of the basal plate (the bottom part of the bulb).

Step 5: Fungicide Treatment

Dust the cut surfaces with fungicide powder to prevent rot and fungal diseases. This step is crucial for the health of the scales.

Step 6: Preparing the Bag

Fill a sealable plastic bag with moistened vermiculite or perlite. The medium should be damp but not wet to the touch.

Step 7: Placing the Scales

Place the twin-scaled bulb sections into the bag with the vermiculite or perlite. Gently mix to ensure the scales are surrounded by the medium.

Step 8: Sealing and Labeling

Seal the bag and label it with the date and variety of the Galanthus. This helps in tracking progress and organizing multiple varieties if you’re propagating more than one.

Step 9: Incubation

Store the sealed bag in a warm, dark place. A temperature of about 21°C (70°F) is ideal. Check periodically to ensure the medium remains moist and to check for signs of growth or disease.

Step 10: Monitoring for Bulblets

After 10-12 weeks, small bulblets should start to form at the base of the scales. Once they are of a reasonable size and have developed roots, they can be carefully potted up.

Step 11: Potting Up

Plant the newly formed bulblets in pots filled with a well-draining soil mix. Keep them in a sheltered, cool place, and maintain consistent moisture.

Step 12: Aftercare

Allow the bulblets to grow on in their pots for at least one full season before considering planting them out in the garden. This will give them time to develop into strong, flowering-size bulbs.

Tips for Success

• Ensure all tools and materials are clean and sterile to minimize disease risk.
• Be gentle when handling the cut scales to avoid damaging the basal plate, which is essential for regrowth.
• Patience is key! It can take a couple of years for the bulblets to flower, so don’t be discouraged if you don’t see blooms right away.

By following these steps, you can successfully twin-scale Galanthus and expand your collection or share these cherished snowdrops with fellow enthusiasts.