CNS17 Yellowing My Plants!

I have a couple problems...

I am using a 1 part nutrient solution called CNS17.

I've initially had success with the formula when I transplanted my plants to soil from hydro. The leaves were shiny, dark green. And slowly they've turned dull and light green. Initally they were growing from 1-2inches per day. Now they arnt growing that fast. I've been upping the dose of nutrients from seedling to the 3rd week of growth which was from 15ml to 30 mls per gallon. I always water the plants with the nutrient solution, maybe I am adding too much nutes?


I've read that some people use other additives like cal-mag for this formula, but as far as Im aware its not required!

I feed it every 3-4 days, when the soil feels light, also the ph is 6.4ph right now its at 900 ppm. Clones are about 9 inches tall.

I have 1 smaller clone that i placed in soil later and its still very dark green and shiny, I wonder if perhaps its because it still has alot of nutes in the soil???

Sexxxy Beast said:

Oh yeah, the soil is fox farm ocean forest.

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are you using he cns17 hydro or coco/soil blend? You could have a stress issue from moving from hydro to soil, try a lil super thrive. and i know this sounds icky but urine. It is free and has loads of nitrogen.

Yes i am always using calmag.

Cns 17 is what i use and it is ok. I find i have to supplement it a lot. Next i think next time i buy nutes i am getting H&G. by the time I add all the supplements I could have bought better stuff.

If i use my well water at 200 ppm shouldnt that compensate for any calcium deficiency?


I am using fox farm ocean forest soil.

I'm running a rather large system with cns17, I add sea mag, cal mag, and Grandmas honey. One of my ISS's in a DWC had a problem with being a light green for the last 3 weeks (its 4 weeks old from seed). When I first started using cns17 I followed their directions and burned the shit out of 100 plants at once. So I cut it in half and I'm having better results. Haven't tried the 2 part bloom mix yet, it goes in Sunday. I don't think cns17 is a bad group of nutrients, but its super potent yet lacking somee of the micros. After I run it one more time, if I don't like it I'm going back to Humbolt or Advanced. As the plants get a little older they are liking the nuts better and looking healthier. I have 9 in a SOG drip to res and they look great. Wouldn't use the cns17 on dirt though, its really thick and I think it would clog up the dirt locking out some much needed micros. Also only feed once a week with nuts, just feed with water the rest of the time in a soil media.