Remove the leaves which supposed to be in water, then cut stems at an angle and put them in water right away.
Once а day mist petals with a spray bottle or flip then upside down and put the whole flower head in a bucket of water for 20-30 minutes.
Hydrangeas take in water from their beautiful PETALS!
Change base water every few days.
After processing them in this way, they last a very long time.
The secret how to keep cut hydrangeas last long