Well i've just had two nice looking soil plants both go male on me

so now i'm down to my two hydro's left, so i'm really hoping to get a female, especially from the large plant which is Durban Poison from cann....seeds.com. I've added two bananas and will have my fingers crossed. Should i add more or is two ok??
DP is about 20days old
The small plant is from the one seed i popped out of a pound of some dank Juicy Fruit (so she says) and is about the same age, but was stunted due to high temps very early.