The "spice" referred to for hydrangeas, particularly for helping to preserve cut blooms, is alum.
What is Alum and Its Role for Hydrangeas?
Alum is a common compound often found in the spice or baking aisle of most grocery stores. While not a culinary spice in the traditional sense, it's used in this context to aid cut hydrangea flowers. Its primary purpose for hydrangeas is to improve their water uptake, which can help prolong the freshness and vibrant appearance of the cut blooms.
How to Use Alum for Cut Hydrangeas
Utilizing alum to extend the vase life of your cut hydrangeas is a simple process:
- Prepare the Stem: After cutting a hydrangea stem from the plant, it's beneficial to make a fresh cut on the stem end.
- Dip in Alum: Gently dip a small section of the freshly cut hydrangea stem into alum powder.
- Place in Water: Immediately after dipping, place the treated stem into a vase filled with water.
This method is believed to facilitate better water absorption by the cut flower, keeping it hydrated and vibrant for a longer period. For more details on preserving cut hydrangeas, you can consult resources on ornamental shrub care, such as Gardening Know How's guide on preserving cut hydrangea blooms.
Key Benefits of Using Alum
Using alum for cut hydrangeas offers a primary benefit:
- Enhanced Water Uptake: It helps the cut stems absorb water more efficiently, which is crucial for maintaining the turgidity and freshness of the delicate hydrangea blooms. This can prevent wilting and extend the beauty of your floral arrangements.
