Why is my hydrangea blooming in October? Believe it or not, this is normal! Reblooming hydrangea varieties (this one behind me is an @endlesssummerhydrangeas) will send out new blooms until a hard frost comes in. This means you get a nice long season with new blooms popping up into the fall there are many different kinds of reblooming hydrangeas on the market if you want to keep up the seasonal interest. You don’t have to worry that late hydrangea blooms are going to affect the flowers for next