Holly shrub is dropping its leaves

Question

All of a sudden this last week our holly tree is dropping its leaves. We’ve had it for for years with no problems. Any idea?

Answer 1

Sudden leaf drop is likely an infestation or disease issue.

I’ve included a link that may help you determine the exact issue.

https://www.gardeningknowhow.com/ornamental/shrubs/holly/diseases-of-holly-bushes-pests-and-diseases-damaging-holly-bushes.htm

If you determine the cause, use the treatment as listed.

If you are unable to determine a cause, treat the plant with Neem Oil. Neem Oil works as both an insecticide and fungicide.
Remove and dispose of the dead leaves around the plant.

Here is a link with more information.

https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

I do want to mention that it is possible that plants can be affected by accidental herbicide overspray. If neighbors or even lawn companies have recently sprayed, this could be a possibility. In this case other plants would show the same symptoms.