im growing 9 plants and 3 of them (pure skunk #1) are looking a little sick. the first week i had them about 18 inches away from the 400watt mh and now that theyre starting to curl and turn yellow ive raised it to 24". i fed them big bloom once theyre last watering. i dont know what to do, besides somehow testing the ph.

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Besides is right... test the pH.

This is either a pH problem, or one of undernute.

Hi sorry to sorta steal the thread but i have some also looking exactly the same as your pics and going down hill pretty fast, so would be interested in any other opinions as i know my ph is right,, all i can think of for mine would be the potting mix is giving nute burn?

Cheers
Bandit

If it's good soil you shouldn't need nutes. You can keep your pH buffered and balanced by using dolomitic lime. Did you use a cloning gel?

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hey potpimp, I'm not a soil grower so I cannot really comment on soil-grown cannabis not needing any nutes. I thought the good soil only had enough nutes to sustain cannabis for the first 3 weeks of its life.

MY real question though is, why'd you ask about the cloning gel?

To both the first and second guy, post some pic's... although to me this sounds like an undernuting problem, caused by either a lack of nutrients or a pH imbalance.

anhedonia, I just looked at your pic's and it's a def nutrient deficiency, certainly nitrogen, maybe boron too. I doubt that in soil, you have a pH imbalance.. although it is still possible.

Your stems look very weak also.

What nutes, if any, have you been giving to the plants?

Looks to me like you have a major nitrogen deficiency. Also, I'm not too experience with alot of kinds of nutes, but isn't big bloom only for flowering? Probably not a lot of nitrogen in it if it is. If it is a nitrogen deficiency, you'll need to get some vegging nutes.

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Hi,
Theres a great book written by George Cervantes called Indoor marijuana Bible. It has awesome pics and discuses specifics on all topics. I grow primarily in soil and always feed with mild fertilizers. I know a few experts that can grow in compost only and I bow to them. For the rest of us, feed with 1/2 strength fertilizer like peters 20-20-20. I use Shultz 10-9-6. Water first them give them a drink of diluted fert. The pics look like deficient nitrogen which is common and easily fixed. Plants don't need fertilizer with every watering. Hope this helps.

Excellent point, I didn't even notice what nutes he'd used. Big Bloom does sound like it should be a flowering nute.

20-20-20 is a little high in P&K for vegging plants, unless I'm mistaken. The NPK ratio should be around 20-5-5 for vegging shouldn't it?

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