Is it the light or nutrients?

I have been growing a feminized strain called alien of for about 10-12 weeks now, been in flower since may 1. Before I had is on 20-4 with a 600 watt LED light (picture of light added) then I switched to 12-12 for flowering. They are in 5 gallon pots with promix HP, being fed flora nova growing nutrients once a week. pH has been 6.2-6.5 range roughly as I only have tests strips. The hairs are starting to turn brown, and the buds arent that big. What am I doing wrong? Is the light not powerful enough? It's been about 1.5 feet away from the plants since may 1 and before that probably the same height if not lower.

I suspect that most of your troubles are related to insufficient light levels.
That's a 100 watt fixture, so it's going to struggle to flower a single plant.
You need mo powah.

Had the same experience in soil, my girls never saw what they should have been. I turned to DWC and currently am not considering going back. This was my first grow
Sad week little girls
I've added 2 more of basically the same lights you are showing and my girls looked better
But still not really even good. They are expensive but get a/ some good quantum boards. Those Amazon specials I'm finding out are lacking in true power. My buds are tight but small and i think it is becaus of my lights. Im running a second batch DWC now and I'll have to see if my new lighting style helps or not. Save up, get a good light. It's worth it.

That type of light can literally be right on top of the leaves. It might have helped keep the plant smaller but those plants do look like they could use more lights

Johiem said:

Save up, get a good light

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get a standard cheap HPS ASAP bc itll make thosr buds swell

Shimko88 said:

I have been growing a feminized strain called alien of for about 10-12 weeks now, been in flower since may 1. Before I had is on 20-4 with a 600 watt LED light (picture of light added) then I switched to 12-12 for flowering. They are in 5 gallon pots with promix HP, being fed flora nova growing nutrients once a week. pH has been 6.2-6.5 range roughly as I only have tests strips. The hairs are starting to turn brown, and the buds arent that big. What am I doing wrong? Is the light not powerful enough? It's been about 1.5 feet away from the plants since may 1 and before that probably the same height if not lower.

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Looks like you have some PM going on. I would tackle that right away before it wreaks havoc on your whole crop.

Kassiopeija said:

get a standard cheap HPS ASAP bc itll make thosr buds swell

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Cheap and hps don't belong in the same sentence. I know when compared to some 130-150.00 usd is "cheap" but it still a hard total to come up with.

Johiem said:

Cheap and hps don't belong in the same sentence. I know when compared to some 130-150.00 usd is "cheap" but it still a hard total to come up with.

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HPS is the most cheap solution that there is. Just last month I bought a 600w set - HPS, Digital Ballast & reflector for 80 bucks from Britain...

Kassiopeija said:

HPS is the most cheap solution that there is. Just last month I bought a 600w set - HPS, Digital Ballast & reflector for 80 bucks from Britain...

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Point me in that direction! I could work with that total a lot easier

I think iits low intensity related but if your buds are already finishing theres little you can do about it this round.

Most probably too much blue light at the mix,while low intensity conditions .
See that it resembles damage from too much UV exposure ?

Johiem said:

Point me in that direction! I could work with that total a lot easier

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SDS_GR said:

Most probably too much blue light at the mix,while low intensity conditions .
See that it resembles damage from too much UV exposure ?

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Kinda but i guess a bit dark green for it to be uv? Dont know cause ive only ever seen uv damage on white light plants and the blurple light allways tends to give darker green leaves.

When I started growing (living half up a mountain back then) I had tremendous UV(?) damage to my indoor veged plants that were directly exposed to a summer sun:

most leaves (esp. fanleaves) got bleached to completely white (like a heavy chlorosis but more - even bleaching the veins to white - destroying all chlorophyl) then they wrinkled, and fell off.
But only in the first week...

All leaves that came out afterwards didnt bleach at all. But since fanleaves lost @ a particular node dont grow back these plants looked strangely like @Sedan 's "fishing rod"-technique plants... (I did veg with incandescants bulbs in a forlorn toilet back then... which offered "free" electricity but these lamps completely lack UV blue photons...)

so thats why I think this Amazon panel hardly contains any UVB - these diodes are expensive.... 23 bucks for 10*310nm even on Alibaba...

You got me wrong . These panels of course do not emit any UV light.
Still they might be emitting too much of blue light .UV and blue photons ,both bear high energy.

Those plants pictured me thinks that they evidently show damage from high energy photons at low intensity conditions .

Shitty light, powdery mildew (is that a blue-coloured humidifier or water filter in the background?), and quite possibly a bit of overwatering going by the size of those grow bags compared to the plants (even with the addition of perlite). Get the light lower, let the bags dry out a bit more between waterings, and get some more air blowing on those leaves to deal with the mildew.

Those plants have still got some flowering time left in them, so if you act now you could still recover this grow. It won't be a huge yield, but at least it won't be a write-off.

Dontjudgeme said:

Looks like you have some PM going on. I would tackle that right away before it wreaks havoc on your whole crop.

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I completely agree.

Prawn Connery said:

I completely agree.

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I have a sulfur spray I bought for that would that work?

So, I'm wondering if the original poster is still around, or are we just talking to ourselves???

and there he is