Which deficiency is that?

Hi guys,

Can you help me to determine which deficiency is this?

About the grow : It's a Blue Amnesia Auto from Amsterdam genetics, I use 11liter fabric pots and used Greenhouse feeding biobloom around 3g/l Substrate at the beginning of Bloom. I use tapwater, do Not Check ph (ph of water should be around 7) and water Them when they've lost Most of their Wright (2-3l per 2-4 days)

Do you water until runoff? I have no idea what deficiency you have, it looks like multiple, so that's why PH issues come to mind

You don't check the ph after mixed? I would certainly start there. I would water when they've lost about 1/3rd of their weight. coco right?

HandyGringo said:

Do you water until runoff? I have no idea what deficiency you have, it looks like multiple, so that's why PH issues come to mind

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Until i can feel the bottom fabric get wet.

nxsov180db said:

You don't check the ph after mixed? I would certainly start there. I would water when they've lost about 1/3rd of their weight. coco right?

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Yeah i dont Check ph, i dont "Mix" though, since you apply gfh only once for veg and once for Bloom.

Paganboy said:

Until i can feel the bottom fabric get wet.

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I don't think that's enough. Generally, when using liquid fertilizers you want X amount of runoff, as far as I know. To avoid a buildup of salts(?) that might influence your soil pH, limiting the uptake of nutrients.

Try doing a full watering and then PH test the runoff water, to see if it's at an acceptable level or not. It looks like you have a pH problem.

If it's a nutrient deficiency it's either Calcium or Phosphorus. What Nutrients are you running? I also encourage checking the pH of runoff water on sick plants.

My handy dandy picture diagnosis tool tells me on pix 2 and 3 phosphorus is your issue.

Paganboy said:

Yeah i dont Check ph, i dont "Mix" though, since you apply gfh only once for veg and once for Bloom.

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Oh ok, so this must be a soil grow?

nxsov180db said:

Oh ok, so this must be a soil grow?

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Yeah

Not enough buffers left in that little amount of soil. With small soil pots you do need to ph your water. The buffers run out just like food does. If you don’t wanna ph then you need to go to at least 10-15 gallons or so of soil depending on how long they’re in the pot.

Paganboy said:

Hi guys,

Can you help me to determine which deficiency is this?

About the grow : It's a Blue Amnesia Auto from Amsterdam genetics, I use 11liter fabric pots and used Greenhouse feeding biobloom around 3g/l Substrate at the beginning of Bloom. I use tapwater, do Not Check ph (ph of water should be around 7) and water Them when they've lost Most of their Wright (2-3l per 2-4 days)

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That actually looks kind of normal, your veg leaves going a bit yellow/brown/mottled when moving into serious bud.

I would check your PH and PPM of the runoff water, using fresh to rinse it
See how much food is left in your medium and what sort of pH change your seeing

pH is something easily screwed up, people create more problems adding all sorts of balancers to get to the right pH
Unless it is really off I wouldnt worry about it
I only checked pH sporadically however my water always came in around 6.5 anyways so there really was no need.

Anyways with your pictures its kind of hard to tell. It could be over or under feeding. Or just normal for your strain.
Sorry I couldnt be of more assistance.

One good way to make sure is to send off your leaf for analysis
See what the nutrient breakdown is like
This is super helpful, instead of guessing you have precise data.

Thank you guys!