Flowering stage

In the right conditions, each plant may start the flowering stage as soon as it's sexually mature, which happens in no less than 3/4 weeks.

Start when they are half the size you want them to finish at. A little less than half if it's a sativa dominant strain.

Depends. For autoflowers it's simple, they will start flowering when they reach sexual maturity, which usually takes 3 weeks under the right conditions (when they deploy their 5th or 6th pair of leaves). For photoperiods the answer is a little more confusing. It depends on they space it has to fill. A 4 week veg will fill a 1 sq ft space, a 5 week veg will be enough for 2 sq ft space (assuming you have a big enough pot)

as soon as you will put yourself under 12h light and 12h darkness, you will start to flower. GSK stands for grow skinny kitties? 😅

Heya Besni, If growing an autoflower it will automatically start flowering at a certain point in its life, no matter how much ligth recieved. For a photoperiod plant you want to switch light schedule to 12/12 to induce the flowering stage. Typically you want to flip to flower when the plant is half the desired height you want as it will stretch up to double during the stretch phase. Some sativa strains even stretch up to three times its size. Good luck and happy farming!