Depends on how big of a plant do you want at the end. Most strains double in height when put into flower. So if you put a veg'ing plant into flower that is 15 inches tall you should end up with something around 30 inches at the finish. If you top the plants in veg that I have grow the stretch is about thirty percent. So a 30 inch topped plant going into flower should be about 40 inches or so at the finish. Most clones are ready at 10-12 inches, from seed 12-14 inches for a minimum height to get some decent bud but you will not have very big yield per plant.
ditdotter Reviewed by ditdotter on . From Veg to Flower stage....when do you know? I am 6 weeks into my first grow, I have a mix of different flavor of plants. My question is when do you know you have hit flowering stage? Is it a time thing/height thing/other?? Any insight will be appreciated. Rating: 5