Pistils starting to turn brown?

So, this is my first grow. I'm going into week 5 of flowering tomorrow. I'm using an aeroponics setup and the browning pistils are on my White Widow ladies. Nutrients are Advanced Nutrients Sensi Bloom two part, concentration is about 1600-1700, pH of 5.5-6.1 depending on how long it's been since I've refilled the reservoir. Lately I've been filling it half full and adding a gallon or so every day to keep it more stable and reduce the danger of another catastrophic leak (long story).

So, a couple weeks ago in one of my pictures of the buds, I noticed that there were a few brown patches on the pistils at the tips, but only on a couple of the buds and the patches were pretty small. Well, now the brown patches are on most of the buds and it's effecting far more pistils on each bud. Some of the pistils are now completely turned.

I read that this could be a result of a nutrient deficiency, but my leaves all look really healthy. The box they're growing in does get very hot, up to 37c during the day cycle. I've been trying to improve ventilation but I've just got too much plant in too little of a box. Chalk it up to a first time grower's mistake.

I also know that the pistils will start to change color and recede as harvest gets closer, and I am starting week 5 of flowering, but I started noticing a little bit of this as early as 2 or 3 weeks in, so I really don't know.

Attached are some close up cropped pictures of the buds. If you want pictures of the leaves you'll have to wait until they wake up, their night lasts until 11:30 PM CST. I can also upload them at a much higher quality than these forums allow if somebody can point me to a safe third party image hosting site.

Thanks for the help guys.

Honestly I can't see anything wrong with them other than that Gi-normous hair in the 2nd pic.
GWN

it kinda looks as though the tips might be getting dry i would mist it with some clean water and see if that helps. you can also spray with sodium free carbonated water and give it some c02 while your at it

GreatwhiteNorth said:

Honestly I can't see anything wrong with them other than that Gi-normous hair in the 2nd pic.
GWN

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So the browning tips are nothing to be worried about?

Not in my experience - they look perfectly healthy to me. Who's strain of WW is that?

It looks as it should. All of those will be completely brown (red) before you harvest it.

It looks as if you have a nice enough camera to be able to zoom in as close as possible, then transfer to your PC, then zoom in again and you can actually see the trichomes (bubbles).

GreatwhiteNorth said:

Not in my experience - they look perfectly healthy to me. Who's strain of WW is that?

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Good to know. The strain came from Ministry of Cannabis, not feminized. They had a sale and I got 10 seeds for something like 20 euro. They grew beautifully, and my biggest one is about 50" tall with 8 or 9 large stems supporting nice big buds on top.

Sandman45 said:

It looks as if you have a nice enough camera to be able to zoom in as close as possible, then transfer to your PC, then zoom in again and you can actually see the trichomes (bubbles).

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Yep, it's a Canon Powershot A720 IS, got it for about 300 dollars two years ago. The screen is pretty crappy and it's hard to tell when things are properly focused when it's that close in, but it does the trick.

On a related note, does an estimated harvest of about 3-4 weeks from now sound right?

I'm running a batch of Dutch Masters WW now and at 9 weeks - I've had two mature a bit early, the others will go to 10 and maybe even 11 weeks.

b.e.a.-utiful. there is nothing wrong. Pass go and collect 200 dollars.

omg those look karma stressed. It' rare but there's a solution. If you want your plants to live then when they are harvested give me some bud. If you don't they will die & you won't have any to give me, or for yourself. Think about it next time you smoke some.

Christ, maybe I should of looked at the fucking date of the OP before I posted anything. 2010

Search result found me this post. So this is normal for start of week 4 since flip?

LordHill said:

Search result found me this post. So this is normal for start of week 4 since flip?

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Looks good to me.

Very nice, looks happy.

Looks like you took that picture under hps?

That was grow lights off, camera flash on.

LED normally however. I have 2 LED panels that pull 245 at the wall. I run them 1 bloom light and the other both bloom and veg light both, switching the one with extra veg each day.

Pistils turning in wk 5?
Either too hot or check the roots. Brown roots = brown pistils.