Hi,

I have a rooted leaf from my friend's huge banana tree and it's started to go yellow. This is the second cutting I've had from her which hasn't worked - what am I doing wrong??
Have put a clear plastic bag over the top and moved it into the bathroom to give it a bit more moisture but still looking bad.
Any banana tree experts out there? :)

I've found this:

"grow best in full sun in soil that provides excellent drainage. Good drainage is crucial since saturated roots may die in less than an hour. It is also important to shelter the banana plant from heavy winds that can tatter the banana plant foliage.

The banana plant is a very heavy feeder. Soil should be nutrient rich, slightly acidic, and loamy enough to retain moisture and keep nutrients from leaching below the shallow roots of the plant. Amendments of good organic compost and green sand or kelp meal will help maintain the banana plant's high mineral requirements.

I'm not certain but it sounds to me like you've used the wrong compost. If it's rooted, I don't think being in a bag will help much to be honest.

Also the article mentions they're propagated by rhizomes
read more here (http://www.whatprice.co.uk/gardening/bananas-growing.html)

Thanks loads for this - will see if I can salvage with some higher quality compost and maybe some seaweed food.
xx