Q.Why Are My Banana Tree Leaves Turning Black?
From Botswana, Africa
Sandy soil
Drip irrigation

BushDoctor
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on November 18, 2019
This will, usually, occur from fungal/bacterial infections. This is caused by being overwatered, or remaining too wet for too long without a chance to dry out some in between waterings.
A fungicide will be useful, here. This article will help you with fungicide use: https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
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