Name of plants that will need 10-10-10 fertilizer
Will 10-10-10 fertilizer be good for hydrangea plants?
Certified GKH Gardening Expert
A hydrangea, as with most plants, will do fine with an all purpose such as that. Most will do their best with specialized ratios but a 10-10-10 is a good start for most things. Start with half strength twice as often if you want to test how your plant responds before going full strength.
This article will help: https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/fertilizing-hydrangeas.htm