edwmax

As already asked what is the soil like. I see a mix was put in to the hole, but the soil around the hole may not allow water to drain out causing water to pool at the bottom. ... I think the soil in your location is very sandy, is that correct? If so, then the water may be draining away too fast and you need mulch on top of the planting bed to hold the moisture. From a couple of your pictures and the leaf droop shown, it looks like the plant may need water. It is hard to tell if too much or not enough water.

How much water and how often is the plant being watered? Bananas do not like to be standing in water, but likes to soil to be moist. The roots need air! Also, frequent watering a little bit at the time is not good. This seals the top of the soil and prevents air from getting to the roots. Get a moisture probe/meter to determin when to water.

What is your daily temperatures? Bananas grow best between 15 C to 32 C (60 F to 90 F) Also, was the plant shaded at the nursery? The plant should adapt to full sun, but a few varieties like partial shade special during high temperatures. The nursery should be able to advise you on this.

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