Maximizing Stretch when Switching Lights?

Here is a quick explination of the problem I was having:

https://www.rollitup.org/marijuana-plant-problems/424758-can-anyone-pin-point.html

Here is how I solved it:
-REPOTTED INTO 7 Gal smartpots filled with a close mix to subcools, instead of letting these buggers starve with no nutes or super soil in a 1 gal grow bag

The problem seems to be solved as the ladies are looking well fed with improved color, and have shown all kinds of secondary growth.

As you can tell I didnt have the perfect Veg, but didnt have a tragic one. I want to make sure these guys stretch to their potential when I switch the lights casue they gotta fill my scrog.

My question: even though my Veg wasnt perfect, and I have solved the nute deficiency prob I was having by actually getting them in the soil I mixed up for them; will I still see the stretch I am looking for now that the plants have all they need to eat? I flipped my last crop when they were about 24" tall expecting them to shoot up to about 4 feet.....for some reason they really didnt stretch when I switched the lights, this left me with a low yeild and disappointment.

Im trying to ensure that doesnt happen again and want to see what you guru's thought before I switched these lights.


Any feedback or tips are appreciated

If you color is coming back and the purple is fading I would say your on your road to recovery lol. Those pics looked like you had pretty bad deficiencies. I would give them and extra week or 2 tops to regain strength. They are amazingly resilient. btw you can somewhat control your stretching. You can move your light up but you can also shorten you daylight times. By this i mean instead of going from 18/6 str8 to 12/12. Go 18/6 to 15/9 to 12/12. The added darkness will help your stretch to begin with if your that worried.