Dwarf Banana problems & how to fix them
Musa acuminata 'Dwarf Cavendish'
Drooping, yellowing, brown tips, or a plant that just won’t thrive? Here are the most common Dwarf Banana problems, what usually causes them, and how to turn things around.
Common problems
Underwatering
In summer it can wilt within a day or two of drying out, browning whole leaf margins. The plant is not getting enough water, either from infrequent watering or soil so dry it repels water. Prognosis is excellent - most underwatered plants perk up within days of proper rehydration.
Spider mites
The broad leaf undersides are prime mite habitat in dry indoor air. Tiny sap-sucking mites that thrive in warm, dry air and leave fine webbing and speckled leaves. Caught early they are very treatable; most plants recover fully within 3-4 weeks of consistent treatment.
a two-spotted spider mite among its silk threads
Photo: Gilles San Martin · CC BY-SA 2.0 · Wikimedia Commons
Root rot
Winter is the danger: a cool, barely growing banana in wet soil rots at the corm. A fungal or bacterial infection of the roots, almost always triggered by soil staying wet too long. Caught early, most plants recover within a few weeks after repotting; if most roots are already mushy, recovery is uncertain.
Phytophthora root rot on a dug-up root ball
Photo: Jerzy Opioła · CC BY-SA 4.0 · Wikimedia Commons
Cold damage
Temperatures below about 13 C stop growth and damage emerging leaves. Tissue injury from a cold draft, a chilly windowsill, or a night outdoors below the plant's tolerance. Damaged leaves will not heal, but if the stems and roots survived, new growth typically appears within three to four weeks in a warm, stable spot.
fig leaves killed by a frost
Photo: Famartin · CC BY-SA 4.0 · Wikimedia Commons
The mistakes that most often kill it
- Keeping the soil summer-wet through a cold, dark winter and rotting the corm.
- Chronic low light producing a weak, stunted plant that never recovers.
- Ignoring spider mites until every leaf is speckled grey.
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