Welcome Pondplantgirl! Here's my advice....the pups of a banana plant are essentially clones of the mother plant, and share all the characteristics and the initial root system of that plant. So, if you can think of the pups as something like corms or bulbs, you have to give them some time to establish their own root systems before separating them from the mother.Don't be in too much of a hurry to expand your grove until the pup is showing strong, vigorous growth,as tempting as that can be. Then, pick a good site, wait for a cool-ish day, and transplant the pup to a well prepared and watered site. I always like to pot on plants once or twice before planting out in the yard, just so you can monitor and adjust that important early growth of a strong independent root system. Hope this
helps...or generates some additional input from someone.