Troubleshooting
Dahlia 'Bora Bora' problems — and how to fix them
Dahlia 'Bora Bora' (Dahlia 'Bora Bora') 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.
Powdery mildew
White powdery film on leaves in humid, crowded conditions. Improve air flow by spacing and disbudding lower growth, water at the base, and remove affected foliage promptly.
Slugs and snails
They devour emerging shoots and shred tender leaves, especially in spring. Protect new growth with barriers, traps, or wildlife-safe controls until plants are established.
Tuber rot in storage or wet soil
Soggy ground or damp winter storage causes mushy, rotting tubers. Plant in sharply drained soil and store lifted tubers dry, cool, and frost-free over winter.
Few flowers, leggy growth
Too much shade or excess nitrogen drives soft foliage and weak stems. Site in full sun, switch to a high-potassium feed, and pinch out the growing tip early to encourage branching.
Prevent dahlia 'bora bora' problems before they start
Most dahlia 'bora bora' issues are care-mismatch, not bad luck. Dial in the basics:
Looking for the species overview? Dahlia — the full care guide.
Dahlia 'Bora Bora' problems — FAQ
Why is my dahlia 'bora bora' powdery mildew?
White powdery film on leaves in humid, crowded conditions. Improve air flow by spacing and disbudding lower growth, water at the base, and remove affected foliage promptly.
Why is my dahlia 'bora bora' slugs and snails?
They devour emerging shoots and shred tender leaves, especially in spring. Protect new growth with barriers, traps, or wildlife-safe controls until plants are established.
Why is my dahlia 'bora bora' tuber rot in storage or wet soil?
Soggy ground or damp winter storage causes mushy, rotting tubers. Plant in sharply drained soil and store lifted tubers dry, cool, and frost-free over winter.
Why is my dahlia 'bora bora' few flowers, leggy growth?
Too much shade or excess nitrogen drives soft foliage and weak stems. Site in full sun, switch to a high-potassium feed, and pinch out the growing tip early to encourage branching.