holly tree

Question

newly planted holly tree in fall was thriving this spring-new growth-formed berries, then leaves (green leaves) have started falling off. seems to be working its way up from the bottom. please help, I love this tree!!

Answer 1

Are the leaves yellowing, brown, have any markings on them?
Has the weather been excessively warm? Have you had excess rainfall or suffering drought?

Here are some links that will help you pinpoint the cause.

https://www.gardeningknowhow.com/ornamental/shrubs/holly/holly-yellow-leaves.htm

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

https://www.gardeningknowhow.com/ornamental/shrubs/holly/holly-problems-holly-leaf-spot-or-holly-tar-spot.htm