The need to refrigerate bulbs before planting depends on the type of bulbs you are dealing with. Some bulbs do require a period of cold stratification, which involves exposing them to cold temperatures for a certain period before planting. This process helps to break the bulbs' dormancy and trigger them to start growing when they are planted in the ground.
Common examples of bulbs that often benefit from cold stratification include:
- Tulips
- Daffodils (Narcissus)
- Crocuses
- Hyacinths
- Some varieties of lilies
- Snowdrops
If you have these types of bulbs, especially if they were purchased in the fall but not planted immediately, refrigerating them for a few weeks (usually 4 to 12 weeks, depending on the specific bulb type) before planting can help improve their performance and ensure successful growth and blooming in the spring.
However, not all bulbs require cold stratification. For some types, such as gladiolus, dahlias, and cannas, chilling can actually harm the bulbs and is unnecessary. Always check the specific instructions or recommendations for the particular bulbs you have to determine whether they require refrigeration before planting.
It's essential to follow the specific guidelines for each type of bulb to ensure they receive the proper treatment for optimal growth and flowering. If you're unsure about whether to refrigerate your bulbs, you can consult a local gardening expert or the supplier from whom you purchased the bulbs for guidance.