Leaf prob now effecting bud :( please help

[Shikatsura]

Hi all first time grower here. Started my first crop on 4/20 this year. 4 plants in a 60x60x140 tent with a 600w viparspectra reflector series led light. Did 4 week veg and now it's just over 5 week since 12/12 plants are coming along nicely apart from 1 it started getting crazy brownish leafs I've flushed them all cut of the most of the bad leafs but the last 2 days I've noticed a few of the tops showing the weird color. Il attach pics of the setup with all 4 inside and pics of the leads and buds in question. Nudes have been using formulex for veg and I've been using bio bloom since flowering.

 

[Shikatsura]

Strains 3 x northern light bottom left is ak47 the one with the problem is the bottom right which sucks has it has a lot of nice tall tops

 

[Aqua Man]

Deficienct... I'm guessing you switch to bloom nutes or cut back your nutrients?

Depending on how long you have to go you may want to consider feeding a little but more. I would say you still have a ways so increasing feed a bit would be my preference.

This is not uncommon and normal in the later stages of flower

 

[Shikatsura]

I was using 10ml in 2 ltrs of water of formulex during veg between all 4 plants once a week then switched to the same 10ml in 2 ltr between the 4 of bio bloom but this time every feed (every3-4day) then i saw somewhere bio bloom is meant to be started small like 1ml per ltr and increase it as flowering advances. So basicly was panicking I might have messed up the ph. So I gave them all a good flush out in the bath. Top soil should be dry maybe tomorrow. What ratio of nutes would you recommend il post a pic of the 2 nutes I have.

 

[Shikatsura]

As for how long to go Nl says 7-8 weeks ak 8-9 its been 5 but as a new grower and the plants only being 4 week from seed flipped i'd say at least a month still

 

[Aqua Man]

I was using 10ml in 2 ltrs of water of formulex during veg between all 4 plants once a week then switched to the same 10ml in 2 ltr between the 4 of bio bloom but this time every feed (every3-4day) then i saw somewhere bio bloom is meant to be started small like 1ml per ltr and increase it as flowering advances. So basicly was panicking I might have messed up the ph. So I gave them all a good flush out in the bath. Top soil should be dry maybe tomorrow. What ratio of nutes would you recommend il post a pic of the 2 nutes I have.

Never used em. But I taper my feeding down after stretch slowly. On an 8-9 week strain I'm feeding 3/4 strength of my max veg nutes after stretch is over. Then about the half the second last week and 1/4 on my last week. I go by ppm and use a 1 part mega crop with some amendments I use to keep from seeing deficiencies.

Maybe start by adding 1/2 ml of the veg nutes and go from there. They don't look to bad for the age but others may have a different opinion. I grow in hydro but I don't starve my plants in later flower some do but I feel it's more important to just to not over feed and still provide adequate nutrition.

 

[Shikatsura]

Thanks for the advice and quick response. I've given it a small amount. Hopefully it will halt the problem and save the buds :)