An excellent flower to use in a cube vase is a hydrangea. They are large and bushy, which contrasts nicely with a cube-shaped, angular container.
The secret is to clip the hydrangea stem’s leaves and save them for the vase.
Push the hydrangea leaves up against the glass’s edges after adding water to the cube.
Once the stems are cut, arrange the blossoms so that they rest directly on the vase’s lip.
How can a hydrangea be made to stand upright in a vase?
Before starting the revival process, replace any water in the arrangement that is older than a day with fresh water. Recut the stems of the hydrangeas that have withered by taking off a section near the bottom. Utilize the boiling-water technique: Water is boiled, then poured into a cup. For 30 seconds, submerge the stems of the hydrangeas that have withered. Put right away into a bowl of warm water (this usually means back into the arrangement). If the blooms are not too old, they will fully recover in a matter of hours. Sometimes the resurrection process will go on for several hours. The flowers will typically still be as vibrant as they were on the first day. I’m not sure if using alum to revive hydrangeas after few days will be successful.