Growers can switch to the flowering stage as soon as the clone has established a solid root system. In optimal conditions, plants should be kept in their vegetative stage for approximately 60 days. This time period should give the plant the opportunity to maximise yield and acclimatise to growing conditions.Click to see full answer. Also to know is, how do you know when to switch to flower?The number of weeks your plants have vegged is a bad indicator of when they are ready to flower. Use the height of the plant as a gauge for determining the height they will finish at. Know your strain and how much additional growth it will produce while flowering.Also, how long does it take for veg to flower? In a sea of green setup, plants are kept relatively short and many are packed into a small space in order to maximize production. Plants should be switched to flower once they’ve reached six to twelve inches in height, which could take anywhere from 1-3 weeks of veg time. Subsequently, one may also ask, how do I switch from veg to flower? Most pro-growers will fuel the transition from veg to bloom by reducing wee hours from 18/6 to 12/12 each day. Maximum hours of light during the veg phase make the plants sturdier and harder. Likely when the length of the day is reduced to about 12 hours, plants start bud formation and flowering.When should I switch to bloom fertilizer?During the flowering phase, you have to switch to bloom fertilizer. Some growers keep giving their plants grow fertilizer in the first and sometimes in the second week of the flowering phase because it is a kind of transition period and the plants still need building blocks to grow quickly.