I have four 4ft basjoos, 1 in my living room, and 3 down my basement under grow lights. My basement stays close to 70 degrees, living room closer to 67 degrees. Only 1 out of the four is actually growing, and its one of the bananas in the basement. I water them about once a week or a little less frequently, but the ones down the basement don't get a ton of light.

I've noticed the top portion of the pseudostems on every one of them is browning and drying up. Are they rotting or just need more water? I also have Musa Ice Cream 'Blue Java' down my basement that's under the same conditions and growing relatively quickly. What do I need to do? Put the basjoos back out in my cool garage? Or water more?