Darktideanswered grow question 4 years ago Hi,
You can switch to flower at any time.
Some people do a flower right away, some wait a month, 2 months, etc.
The below should be taken into account in determining when to switch to flower.
* What size of plant/s can your setup support as you can see double the size in the flower stretch
* Is the plant healthy & free of pests?
* How long do you want to wait to harvest.
*Are you going to TOP, FIM, or LST train.
For myself I ran into different issues in Veg so I delayed switching to flower to ensure they were healthy and I had the right equipment.
Good luck with your decision.