Concensus on when to start bloom nutrients

[Phytoplankton]

Plants are growing well, in soil (Happy Frog), 7 1/2 gallon grow bags, lighting is two 2000 watt (actual draw 390 watts) Bestva LED's in a 6.5 X6.5 ft. tent. The plants are about 3 feet high now and a couple months old. I want to get an idea of when I should switch from a high nitrogen fertilizer to a bloom enhancer? Should I wait until I switch the lights to 12/12 hrs., or start before I adjust the light?

[M_C]

People usually switch to 12/12 & wait for stretch to pretty much end before swapping from veg to bloom

[Shreder]

First couple weeks of 12/12 arent true flower,
Its about the same veg growth, nutes and light spectrum.. after about 14-21 days in 12h lights plants will slow down the stretch and will start shooting preflowers .. thats when u add early bloom fert.. then carry on according to yer feed schedule

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[existence]

I have this in my notes from Kyle Kushman....

Transition refers to the changeover from vegetive growth to flowering. It begins when you initiate flowering and typically lasts 1-2 weeks. Transitional feeding should last longer for Sativa’s than Indica’s, as they take longer to complete budset.

In the first weeks of flowering the plant still needs the same levels of Nitrogen because the plant is still vigorously growing new shoots, leaves, and branches. Not flowers, which is the reason it doesn’t require the ratio of a flowering fertilizer until after budset.

For week one of flowering I suggest continuing the exact diet that got you there. In week two I suggest going 50/50, grow and bloom diets. For week three it’s usually discontinue the grow and pump up the bloom. Except for the Strawberry Cough.

When the Strawberry Cough is growing at her most vigorous, I’ve seen indoor colas as big as pineapples, I’ll give her full strength grow up to the 4th week. On top of full strength bloom!

By not depriving your plants of a HIGH NITROGEN diet as soon as you turn the lights out they will grow stronger and heartier. Having a chance to store a little more nitrogen in plant tissue will help them stay green and healthy to the end. Green foliage is the only way plants get the chance to come to full fruition. By still having the ability to photo synthesize during the ripening process.

[Geordie_grower]

Quality advice, always two weeks minimum from what I’m told didn’t realise four weeks was a thing