That really depends on your growing conditions and most importantly, the variety. The wild Rhodochlamys species (like velutina and ornata) usually average about 5 months or so. The larger wild species will generally take about 12-18 months, however, in the perfect conditions 9 months is normal. Edible cultivars will usually also take about 12-18m months, even dwarf varieties, however, some of the taller ones like 'Saba' and the Reds (dwarf and tall 'Red') will easily take 2 years or more, especially the first time they fruit, but again, most of these (except the Reds) can fruit in 9 month under supreme conditons. 'Raja Puri' has been recored to fruit at 6 months, but usually take the normal 9-12. All of these times though are under the assumption that you can keep your bananas actively growing all year long without any longs breaks, this means basically the extreme Southern US, other tropical regions thru-out the world, or a heated greenhouse.
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Growing bananas in Colorado, Washington, Hawaii since 2004. Commercial banana farmer, 200+ varieties.
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