Troubleshooting
Blue Java Banana problems — and how to fix them
Blue Java Banana (Musa acuminata x balbisiana) 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.
Frost dieback
The pseudostem is killed by hard frosts but the corm may survive to zone 8. Mulch heavily before the first frost and cut back blackened pseudostems in spring.
Slow fruiting in cool climates
Blue Java requires a long warm season (9-15 months after shooting) to fruit. In temperate climates it rarely fruits outdoors; consider a heated glasshouse.
Leaf scorch
Wind and low humidity cause brown, dry leaf edges. Provide a windbreak and increase humidity around the plant.
Aphid colonies
Common on new leaves and flower bracts. Knock off with a strong water jet or apply insecticidal soap.
Corm rot in waterlogged soil
Standing water over winter kills the overwintering corm. Improve drainage before planting or grow in raised beds.
Prevent blue java banana problems before they start
Most blue java banana issues are care-mismatch, not bad luck. Dial in the basics:
Blue Java Banana problems — FAQ
Why is my blue java banana frost dieback?
The pseudostem is killed by hard frosts but the corm may survive to zone 8. Mulch heavily before the first frost and cut back blackened pseudostems in spring.
Why is my blue java banana slow fruiting in cool climates?
Blue Java requires a long warm season (9-15 months after shooting) to fruit. In temperate climates it rarely fruits outdoors; consider a heated glasshouse.
Why is my blue java banana leaf scorch?
Wind and low humidity cause brown, dry leaf edges. Provide a windbreak and increase humidity around the plant.
Why is my blue java banana aphid colonies?
Common on new leaves and flower bracts. Knock off with a strong water jet or apply insecticidal soap.
Why is my blue java banana corm rot in waterlogged soil?
Standing water over winter kills the overwintering corm. Improve drainage before planting or grow in raised beds.