- Thank you for contacting the Toronto Master gardeners with your plant ID question.
Unfortunately, it is very difficult to ID the plant from your photo. Is the flower white with a dark throat or pale purple? Are the petals frilled? A close up photo of the flower would help us identifiy this particular cultivar.
The American Rhodendron Society has an excellent website which allows you to search for the particular plant cultivar by flower colour, height of plant and bloom time.
You may also wish to check out this website which gives stock photos of various rhododendron cultivars.
Good Luck with your search.