Get another stem?

[tryno12]

A few questions please? The large is a pic of a grafted plant that I received from a friend. The others are from seed of Ginger's. I don't know what the graft is but was wondering if I can make another main shoot/stem come out? or why should I -- don't know if it would produce more or not? I believe it to be a Beefsteak type Indeterminate. also a little purple color on top side of some branches and some on lower leaves - i think i have seen that before so no big deal? Also should i take the bottom leaves off? It will be 2 weeks to keep these things healthy before i can plant here in Central Indiana! I have been sticking the suckers in the ground to see what I get
Thanks all!