Hydrangeas are so beautiful and really add a lot to almost any style design, BUT, they can quickly go limp and that makes many people shy away from them. When purchased from a florist, they should have been processed correctly and that will great increase the likelihood of them holding up for many, many days. Even when everything has been done right, nature still throws a surprise at you now and then so let’s talk about ways to up the odds.
If buying just cut hydrangeas, remove the leaves. The leaves will steal water needed for the bloom. Cut about 1 inch off the stems and put into very hot water. Leave them in this water for the next day and then recut and put in a vase with floral preservative.
There are several ways to re-hydrate a difficult hydrangea. The easiest is to simply fill your sink with cool water, give the stem a fresh cut (maybe an inch), and then submerge the entire flower in the water. After maybe an hour, it should be nice and firm and ready to be put back into your arrangement. If it’s not, let it sit for awhile longer in the water.
Another way to rehydrate a hydrangea is to give it a fresh cut and then put in a vase of almost boiling water. Leave it there until the water cools to room temperature and the bloom is firm, then put back into your arrangement.
https://samuelsflorist.com/burbank-samuels-florist/flower-lovers-bouquet.html
If you have alum in your cabinet for cooking, you can also give the stem a fresh cut, dip right into some alum power and then put in a vase of warm water. It should firm up pretty quickly.
