First outdoor grow Diablo Rojo XL Auto

So I ended up giving two Diablo dojos to a friend for his garden and I put the other two and the dark devil into an old barrel. I used to use the barrel for burning wood and greenery, so that’s all I’ve done is added a bit of soil to the top of the old ash and planted them in there. Not ideal but I thought they would be away from any nosey people. I was actually suspicious that the ash would kill them but they are loving it in there. They weather has been on and off one day really sunny then the next raining all day. The only thing is they haven’t grown any side branching but they have grown so tall they are nearly coming out of the barrel. This isn’t going to be my best grow but it’s just a bit of fun and exp