When to start giving a fertilizer for flowering?

Hi

I have one specific question, especially for people cultivating AF on mineral fertilizers.

My main soil is a 2/3 Allmix and 1/3 lightmix mix, the plants grow the first 14 days only in Lightmix. Then I exaggerate them to the pots 11-14l.

Having such soil and AF plants, when should I give the first small dose of flowering fertilizer? (nitrogen in soil is enough for 6 weeks)

Usually, around 28-30 days, the first white hair begins to grow and the flowering of AF plants begins. Do you start to give fertilizer then?
Maybe it's better to wait another 1-2 weeks?
Plants will not show signs of deficiency at this moment of their lives.
I can't check the EC because I use Hesi fertilizers.
I have to decide without any information from the plant.

These are my first attempts with mineral fertilizers, I try to learn as much as possible.

I personally feed flower once the stretch has stopped

Nope_49595933949 said:

I personally feed flower once the stretch has stopped

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How many weeks from the first white hair?

GreenRat said:

How many weeks from the first white hair?

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That depends. Could be a couple weeks could be a couple months. Depends on what you are growing and how.

Simple AF cultivation with Hesi minerals, in a mixture of weak and strong soil. Usually FastBuds. Strong LED lamp.
AF plants usually stop stretching after 2-3 weeks of flowering, I think so.

I just start feeding bloom nutes right when I flip. For autos it's usually once the lower branches start to show some flower clusters. (Main branch usually develops first)

If you cut your nitrogen too early you can always top dress. I feed bloom and flower 1 week after I see white.

When I'm using AN nutes I give a half dose of Big Bud a week before flipping to flower and the other half at the flip. Regular BB feedings with the rest of the nutes until around the end of week 5. Gets more bud sites and grows them fast. Waiting until after the stretch misses out the huge growth spurt that the stretch is so I let the heat get up to 90F and add CO2 with extra light and nutes to take advantage of it. Then go back to regular feeding a bloom mix lower on N after.

Nope_49595933949 said:

I personally feed flower once the stretch has stopped

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Missing the boat waiting that long friend. Try my way once and see if you don't notice faster and larger flowers when the stretch is done.

If growing in pots of real soil like Fox Farms or something similar there probably is adequate levels of P and K that the difference wouldn't be so noticeable but using hydro nutes it really pops.

I run veg nutes til about a week into the stretch, then it's 50/50 for the next week. Full bloom thereafter. Usually at week 3 from flipping.

I start to give veg with 50% bloom nutes the last feeding before flipping and move to straight bloom about two weeks later

I see most people add flowering fertilizer after switching to 12\12. I think I will wait 2 weeks longer with Hesi Bloom Complex for AF plants due to the strong soil.

GreenRat said:

I see most people add flowering fertilizer after switching to 12\12. I think I will wait 2 weeks longer with Hesi Bloom Complex for AF plants due to the strong soil.

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I use the veg nutes for the nitrogen during the stretch.