Red Dogwood Blooming White? Rootstock Has Taken Over

Grafted Trees Can Revert to Rootstock Growth

Your red dogwood was likely grafted onto a white dogwood rootstock. Over time, the more vigorous rootstock sent up shoots that overwhelmed the red-flowering scion. The white blooms you see are from the rootstock, not the desired cultivar.

How to Restore Red Flowers

1. Identify the graft union (a visible bulge or change in bark texture near the base).
2. Prune away all branches originating below the graft union—these are the white-flowering rootstock growth.
3. Encourage growth above the graft by fertilizing in April, June, and September.
4. Mulch widely and water during drought to support the remaining red-flowering wood.

If no red-flowering branches remain above the graft, the tree cannot revert; replacement with a new grafted tree is the only option.