How close can I grow Grand Nain bananas in ground in a green house? What is the ideal PH for them?

Hershell, The Grand Nain bananas that I have grown in my greenhouse (see my Avatar), grew about 7 feet tall and 5 ft wide, and commonly began fruiting after the 15th+- leaf. They are the most widely grown commercial banana in the world today. It is the "Chiquita" banana sold in most supermarkets. Commercially in South America a Grand Nain produces bunches up to 150-lbs. Mine, grown in my Colorado greenhouse did not produce a bunch that heavy. Bananas grow best in slightly acid soils with a pH around 6.5. Acidified fertilizers can be used a couple times a year if your soil has a higher pH. Bananas are heavy feeders and drinkers. Best results are obtained with a hand full of slow release fertilizer thrown in with the planting. Then liquid high potassium fertilizers applied throughout the growing season (6-2-12 or 9-3-27). All growth stops at temperatures <55F. Good luck - Millet (834-)

Millet I have 12 Grand Nain Plants now IN 3 Gallon pots, You and Sketer recommended this variety to me a while back. I also bought 2 Grand Nain X and one Icecream. I just finished our other green house yesterday and need to know how far I have to space the plants apart so they wont be crowded and conserve GH space. The GH is 30 by 96 with 8 foot sides it is 14 feet in the center. I hope that is enough for the Icecream. Thanks for the help. I checked the soil PH last night and it is 5.7

Good luck, my Ice cream was almost 20ft tall before it fruited.

My dwarf oronoco banana P stem survived this winter and over 6 feet tall. I look forward to some fruit this year.