Growing Ensete Ventricosum Maurelii by the window

I decided to get a jump start on my Ensete Maurelii so that I can have bigger plants to bring outside by the spring time. I purchased these guys 3 weeks ago, and they have since put out a couple of leaves. The only thing I hope for is that their pseudo-stems stay healthy and strong, and giving them light from a south facing window will hopefully be enough.

There are 3 plants total.

November 13th 2012: They looked kind of skinny when they came out of the box.