When to switch to flower?

After u top, u could start training out the side branches as they beast out. Filling up 70 % of ur horizontal space. U want room for air flow and air movement around the plants. Than flip and train the first week of stretch to fill up another 10% putting u at 80% horizontally full. Than allow all the branches uve spaced out and filled ur canopy with to turn up and stretch vertically. Leaving yourself with a sea full of javelins. Later a sea full of donkey dick colas. Plus u greatly eliminated the threat of ur plants getting to tall by keeping up the training during the first week of flower stretch. Good luck fam