Winter Protection for Hardy Banana (Musa basjoo) in Coastal Kent, UK

Geoff in Romney Marsh, Kent (coastal UK) has 1.2 m tall Musa basjoo bananas planted against a garden wall. He wants to protect the pseudostems to gain height next year, rather than letting them die back to ground level. One potted plant can go in a conservatory.

When to Protect

Apply protection just before the first hard freeze is forecast. Don't wait until after — the stem tissue damages quickly.

Step-by-Step Protection Method

1. Build a wire cage (chicken wire or hardware cloth) around the trunk. Taller cage = more stem saved.
2. Stuff the cage completely with dry insulating material: straw, dry leaves, shredded paper. Pack loosely but thoroughly.
3. Cut the banana top down so the remaining pseudostem is at least 15 cm below the cage top.
4. Cover the cage top with more dry insulation.
5. Wrap the entire cage tightly with heavy-duty polyethylene (clear or black). Seal edges with tape or staples. This keeps moisture out and heat in.
6. Pile extra insulation (straw, leaves) around the base outside the plastic.

Spring Unveiling

After the last hard frost (usually April in Kent), unwrap carefully. If the top is mushy, cut down to firm, white/green tissue. Even if the whole stem is lost, the corm will resprout — and often grows taller the next year thanks to the established root system.

Potted Plant in Conservatory

Keep it just moist, bright, cool (10–15 °C). No fertilizer. It may look rough by March but will explode in growth when moved out.

This method works well in UK coastal climates where frosts are sharp but not prolonged. Good luck!