Troubleshooting
Butt's bougainvillea problems — and how to fix them
Butt's bougainvillea (Bougainvillea x buttiana) 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.
Chlorosis (yellowing leaves)
Often caused by iron or magnesium deficiency, particularly in alkaline soils or hard-water areas. Treat with chelated iron (sequestered iron) foliar spray and acidify the growing medium. Overwatering also causes yellowing — check drainage first.
Mealybugs
White waxy clusters in leaf axils and on stems. Remove with a cotton swab dipped in rubbing alcohol; apply insecticidal soap or neem oil spray. Systemic insecticides are effective for heavy infestations on established outdoor plants.
Frost damage
Foliage blackens after even light frost (below 4 °C / 39 °F). In temperate climates, move containers under glass before first frost. Established plants in sheltered UK spots may resprout from the base after a mild frost but are reliably hardy only above 10 °C.
Prevent butt's bougainvillea problems before they start
Most butt's bougainvillea issues are care-mismatch, not bad luck. Dial in the basics:
Looking for butt's bougainvillea in general rather than its problems? Read the full butt's bougainvillea care guide — light, water, soil and feeding.
Butt's bougainvillea problems — FAQ
Why is my butt's bougainvillea chlorosis (yellowing leaves)?
Often caused by iron or magnesium deficiency, particularly in alkaline soils or hard-water areas. Treat with chelated iron (sequestered iron) foliar spray and acidify the growing medium. Overwatering also causes yellowing — check drainage first.
Why is my butt's bougainvillea mealybugs?
White waxy clusters in leaf axils and on stems. Remove with a cotton swab dipped in rubbing alcohol; apply insecticidal soap or neem oil spray. Systemic insecticides are effective for heavy infestations on established outdoor plants.
Why is my butt's bougainvillea frost damage?
Foliage blackens after even light frost (below 4 °C / 39 °F). In temperate climates, move containers under glass before first frost. Established plants in sheltered UK spots may resprout from the base after a mild frost but are reliably hardy only above 10 °C.