QuestionIf I am looking to have banana trees bear fruit how do I winterize them. Thank you very much. Sue
AnswerOdd but true: Bananas are in fact NOT classified as 'Trees' at all -- they are the LARGEST herbaceous perennials in the kingdom. They need full Sun, a very large pot with rich soil (lots of Phosphorous if and when you reach the Banana-making stage), and moisture -- air thick with humidity, a pot with well drained, rich loam that holds moisture.
These can be especially hard to master indoors because of the Sun requirement on a plant that grows so quickly, and so large. But a heated Greenhouse or artificial lighting plus Skylights make it possible to supply enough solar energy for fruit production. At least 30 leaves must be counted on the plant before flowering can be expected.
A 'Citrus' labelled fertilizer applied in March, June, and October will be needed to boost banana-bearing capabilities. Greensand, Kelp or other amendments will enrich the soil. Water when the soil is dry -- and don't wait too long. These plants cannot stand drought. The plant must be at least 18 to 24 months old to bear fruit.
Remember, these plants are most popular however for their foliage. Even without fruit -- for whatever reason -- they hold a legitimate place in the houseplant hall of fame.
Hope that answers your question. If you have any more feel free to post. Thanks for writing.