Position
Blue Java bananas require full sunlight for at least 6-8 hours daily for optimal growth. They can tolerate partial shade but may produce fewer fruits under such conditions.
Space plants about 4-5m apart to allow for their full growth and avoid crowding.
Plant to the same depth as in the nursery bag.
Soil
Well-draining, rich, loamy, or sandy soil is ideal. The plant does not thrive in waterlogged or clay-heavy soils.
The best soil pH is 5.5 to 7.0, which is slightly acidic to neutral. Acid compost and organic matter can improve soil fertility and drainage.
Watering
Blue Java banana trees need regular watering, especially during hot or dry periods. To prevent root rot, keep the soil moist but not waterlogged.
Water deeply at the base of the plant to encourage strong root growth. Inconsistent watering can lead to stress, reducing fruit production.
Mulch
Apply 2 to 5 centimetres of pine bark mulch to protect the roots from UV damage and drying out. The mulch retains moisture and maintains an optimal pH. Do not let the mulch touch the plant stem, as it may cause infection or rot.
Fertilising
These trees are heavy feeders and benefit from regular fertilisation.
Use a balanced fertilizer with equal amounts of nitrogen, phosphorus, and potassium (NPK 10-10-10) to promote healthy growth. A high-potassium fertilizer is essential for fruiting.
Apply our slow-release all-plant fertiliser. Apply 1 teaspoon every 4-5 months. The roots will absorb what they need.
Alternatively, apply a balanced fertiliser ( 10-10-10) before new growth begins in early spring. Thereafter fertilise annually in early spring.
Pruning
Regularly remove dead or damaged leaves to maintain plant health and appearance. Blue Java bananas produce suckers (offshoots) from the base. While some should be allowed to grow and replace the parent plant after fruiting, remove excess suckers at the bottom of the tree to ensure the tree focuses its energy on fruit production.
Pests and Diseases
Aphids, spider mites, and banana weevils can sometimes affect banana plants. Blue Java bananas can be susceptible to fungal diseases such as Panama disease and Sigatoka. Good air circulation, well-drained soil, and proper watering can help prevent these issues.
Treat promptly with agricultural Neem Oil or preferably use preventative measures by spraying Effective Microorganisms (EM Control)
Harvest
It takes about 15-24 months for the tree to mature and produce fruit. Harvest when the bananas turn from blue to pale yellow, and the fruit feels soft but not mushy.
After harvesting, the main stem will die. However, new suckers will grow from the base to continue the cycle.
