Propagating by Rhizome Division
Rhizome (corm) division is a method of propagating banana plants when pups are not available. It involves cutting the rhizome into sections, each with at least one growth point (eye), and planting these sections to grow into new plants.
When to Use This Method
Rhizome division is useful when you want to multiply a plant that is not producing many pups, or when you have access to a large rhizome from a removed or harvested plant. It is less reliable than pup division because not all rhizome pieces will produce viable plants.
How to Do It
- Dig up the rhizome or use one from a recently harvested plant (the pseudostem above was cut down after fruiting)
- Clean off soil and inspect for signs of disease (Panama disease shows as brown vascular discoloration) or weevil tunnels. Discard any damaged pieces.
- Cut the rhizome into pieces, each at least 6 inches across and containing at least one visible eye (growing point). Use a clean, sharp knife.
- Let the cut pieces dry in shade for 1-2 days to form a callus
- Plant each piece 2-3 inches deep in moist, well-draining soil with the eyes facing up
- Keep moist and warm. New shoots should emerge within 2-6 weeks.
Hot water treatment before planting can eliminate nematodes: submerge rhizome pieces in 130°F water for 10 minutes, then cool immediately.
Success Rate
Expect 50-70% of rhizome pieces to produce viable plants. Larger pieces with prominent eyes have the highest success rate. Small or damaged pieces are less reliable.