Troubleshooting
Bob Gordon Elderberry problems — and how to fix them
Bob Gordon Elderberry (Sambucus nigra 'Bob Gordon') is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Low fruit set without a pollinator
Bob Gordon is not reliably self-fertile. Plant a second cultivar (Adams, Nova, or York) within 15–20 m to ensure cross-pollination and maximise berry cluster size and fruit set.
Cane borer damage
Desmocerus palliatus (elderberry borer) larvae cause cane wilting from the crown down. Remove and destroy affected canes at ground level promptly. Vigorous, well-fed plants recover quickly.
Leaf curl from aphids
Black bean aphids colonise new shoot tips, causing leaf curl and distorted growth. Treat early with insecticidal soap or neem oil. Established plants rarely suffer serious long-term damage.
Prevent bob gordon elderberry problems before they start
Most bob gordon elderberry issues are care-mismatch, not bad luck. Dial in the basics:
Bob Gordon Elderberry problems — FAQ
Why is my bob gordon elderberry low fruit set without a pollinator?
Bob Gordon is not reliably self-fertile. Plant a second cultivar (Adams, Nova, or York) within 15–20 m to ensure cross-pollination and maximise berry cluster size and fruit set.
Why is my bob gordon elderberry cane borer damage?
Desmocerus palliatus (elderberry borer) larvae cause cane wilting from the crown down. Remove and destroy affected canes at ground level promptly. Vigorous, well-fed plants recover quickly.
Why is my bob gordon elderberry leaf curl from aphids?
Black bean aphids colonise new shoot tips, causing leaf curl and distorted growth. Treat early with insecticidal soap or neem oil. Established plants rarely suffer serious long-term damage.