Hydrangeas love to have their heads plunged into cold water as soon as they are cut out in the garden. Then immediately put the stem ends into the same cold water. Bring them inside And put wet paper towels over the blooms. Let sit for at least three hours or overnight. They will last at least a week to 10 days or more. I did this one morning when it was in the 90s. I made the bouquet and brought it out on the covered porch for a birthday party celebration, and even in the heat and high humidity they never flagged. I brought them in that evening and they held for another week and a half at least.
Hydrangeas love to have their heads plunged into cold water as soon as they are cut out in the garden. Then immediately put the stem ends into the same cold water. Bring them inside And put wet paper towels over the blooms. Let sit for at least three hours or overnight. They will last at least a week to 10 days or more. I did this one morning when it was in the 90s. I made the bouquet and brought it out on the covered porch for a birthday party celebration, and even in the heat and high humidity they never flagged. I brought them in that evening and they held for another week and a half at least.