How long should I veg for? Currently the third week of veg
It needs at least 21 days in veg before it will start flowering. Everyone has different goals for their plant in what they want out of it. I personally like to aim for 30-40 days in veg and then i'll flip to flower. I grow small to medium sized plants so a shorter veg time works for me. You may want to veg it longer depending on space size or if you're aiming for a certain yield.
When flipping to flower does it increase the size of the plant or just start the blooming process?