Skinny Pot/Weed?

Start of flower. I only defoliated lightly as that's the recommendation for first timers. I had a faulty light timer. Switching to 12/12 light schedule I also had to switch the actual time the light is off. Lots of changes let's watch and see how the plant reacts. The first week of flowering and my Durban Poison is 20" tall by 31" wide. I was thinking it was going to grow taller than wider, it is healthy and still growing. We will see what's happens in the next two weeks. This plant was not topped and it has lots of side branches. This afternoon I will change nutrient solution to 50/50 maxigrow to maxibloom.