|dropping buds. It's in an east facing window|
I am sorry for this delayed reply to your gardening question. The spring rush has brought a deluge of questions and we are working hard to catch up!
Something is stressing the bush. Likely causes include soggy soil conditions and dry conditions. Other things such as physical injury to the roots can cause this.
Thanks for the question. Best wishes for a wonderful gardening season. Please stop in again soon!