I live in Zone 6 (St Louis, Mo) and want to know if I can transplant my banana tree pup which is about 3 feet tall now. Should I do it this time of year or wait until spring?
Yes, spring is the best time to divide the non-fruit-bearing banana tree.
https://www.gardeningknowhow.com/edible/fruits/banana/dividing-banana-pups.htm
They are currently planted around our pool. The ground is covered with under-layment and rock. We live in Illinois so do get snow and frost over the winter.
This depends on the cultivar. Hardy bananas can stay outside, given that they are well protected.
That doesn't look to be a hardy type, though.
These will need to be dug up AFTER they have died, completely. Growing them in a large container will be an easy way to winter them indoors, without having to dig them up each year.
Here is an article that will help:
https://www.gardeningknowhow.com/edible/fruits/banana/banana-plants-in-winter.htm
I have heard it is not a good idea as it removes nitrogen during the decomposing process? Can anyone please advise. Thankyou
Organic mulch, such as leaves, bark, grass trimmings, wood chips or other materials that could potentially be composted will help the tree and add nitrogen to its soil. Waste material that's not compostable would not be helpful.
https://www.gardeningknowhow.com/edible/fruits/banana/growing-cold-hardy-bananas.htm
Would i need small rocks, or several holes in bottom and how often should it be watered?
Your container definitely needs holes in the bottom for drainage. Let the soil dry out a little before watering again. Do not let the plant sit in water or root rot will set in.
This article should help:
https://www.gardeningknowhow.com/edible/fruits/banana/indoor-banana-plant.htm
I started growing several varieties of banana this year, zone 8a. On November 1 I cut back two of the bananas (a Red Abyssinian and a Siam Ruby) and placed them in their containers on a shelf in my garage. It is now Jan 1, two months later. With no water and no light for two months I'm amazed that they're slowly growing. I've included pictures from Nov 1 and Jan 1. Anyone have this experience before? Shouldn't they be totally dormant?
I suspect it is warm in your garage or there was a warm spell. Normally a dormant plant will grow only minimally. Since yours are growing, I would water them occasionally. You could even move them to a sunny area and treat them like houseplants, but still water minimally.
https://www.gardeningknowhow.com/edible/fruits/banana/banana-plants-in-winter.htm
i live in Ormond Beach Fla. near Daytona Beach border. Do I need to cut back my red leaf banana tree? if so, how far back? There hasn't been temps below 45 and the tree is healthy. it's been outside all year.
You probably don't need to prune it back unless it has browned leaves or is shooting up suckers from the ground. If you do need to do some cutting, use sterile tools and cut at a 45 degree angle. Here's an article with some tips on growing banana trees in your zone.
https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-9-10-11/zone-9-banana-trees.htm
Picture is of mature banana tree. It is indoor in an atrium. There are 5 more in various stages of growth and all even the new sprouts tips of leaves look like this
check your growing conditions against these tips:
https://www.gardeningknowhow.com/edible/fruits/banana/indoor-banana-plant.htm
https://www.gardeningknowhow.com/edible/fruits/banana/feeding-banana-plants.htm