Hydrangea macrophylla · Rutgers NJAES Cooperative Extension rates hydrangeas C — occasionally damaged on their landscape deer-resistance scale (A = rarely damaged, D = frequently damaged).
How to keep deer from eating your hydrangeas
If you want to keep hydrangeas, protect them: rotate a deer repellent, fence young plants, and mix in truly deer-resistant plants nearby so your yard is a less tempting target.
Deer repellent on Amazon → Deer fencing →
Deer-resistant alternatives
Want something deer won’t touch? Start with the plants Rutgers rates A, or filter all 527 by your zone in the finder.