Please help me identify the issue here. Week 3 flower. Skunk#1 from seedsman.

[CamZ]

I can confirm that does appear to be nutrient burn. Is that the plant the leaves are from? You should probably try and get a runoff test watering cycle and post those numbers, including input water ppm/ec. Nute burn typically causes  the tips to rolling inward like that or to drop straight down like they are really heavy at the tip.

[Joshua1876]

Yes is it the same plant that the leaves came from. When the lights come on I’ll go in and get a runoff reading and post it for you guys.

[Joshua1876]

So I did a soil runoff test. Results are.

PPM: 900

PH: 6.98

WATER TEMP: 76.8°F

WEEK 3 OF FLOWER GOING INTO WEEK 4

[Joshua1876]

I think you may be right Chris, I think it may be deficient of phosphorus or potassium. Now that I know the ppm and ph it seems that nutrient burn is unlikely. Do you have any suggestions as to a good PK booster to use to boost those levels?

[Joshua1876]

What’s your opinion based on those numbers guys?

[CamZ]

I am a bit conflicted. The first set of pictures you posted seemed to indicate a deficiency. The tip burning I see on the middle section made it appear a bit like slight nutrient toxcicity, but I don’t see much going on at the top of the plant. Is that correct? It’s a bit hard to tell from the picture. Based on the fact that your runoff was 900ppm, it’s pretty hard to dispute it is a deficiency. I am going to defer this one to Chris because I’m just not sure what’s going on 100%.

[CamZ]

What I can tell you for certain is that you’ll need to find something with a percentage of immediatly avaliable p and k if you choose an organic booster. The way you can determine that is by looking at its solulability. Aside from organic inputs, there are a myriad of pk boosters in the synthetic range. IMO none of them are anything crazy. I would just try and find a small amount of jacks 0-12-26 since it’s just p and k. Again, I would wait for Chris before making any decisions.

[Joshua1876]

I have some MOAB 0-52-32 could I throw it in the water and water the plants with it for immediate potassium and phosphorus

[Joshua1876]

It’s slowly starting to happen to my other plants so I’m wondering if I can do this for some immediate help

[CamZ]

If the issue is actually phosphorus that might help. I don’t think it is potassium, but there is no guarantee it is caused by that 100%.  If we are wrong and you add it you could make the issue worse by creating a further imbalance. If you decide to add it in, be sure to mix it at a half or possibly quarter dose. Boosters are meant to be added in to shock the plant into producing more growth with nutrient stress. They should really only be used 1 or 2 times and it’s generally a feed followed by plain water with the next watering. As you can imagine, it’s very easy to burn your plants with them. Boosters are normally 100% bioavalible.

If you mix at 1/2 or even 1/4 strength and water it in you should notice the issue stopping. If it stops then that was your problem. Sorry I can’t give you a concrete answer. I’m just not entirely positive, though it could be an irregular phosphorus deficiency. Potassium will generally cause more yellowing. Phosphorus causes brown spots, but that pattern seems off.

[CamZ]

Any update on the grow?

[reflux1]

mg def takes place at the end of the leafe wich die and then curl up

[CamZ]

Mg deficiency typically shows between leaf veins. It’s typical sign is interveinal chlorosis.

[Author]

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