I've been looking and looking but have not seen a reliable ppm chart for growing marijuana? I have heard people say use full strength, use half, use a quarter..I just want to know what you guys keep your ppm's at and when. If there is a nice chart somewhere out there that would be great too. Thanks!

PPM for Hanna Chart PPM


Seedlings, Early Sprouts 100 to 250

Early Vegging 300 to 400

Full Vegetation 450 to 700

Early Blooming 750 to 950

Full Mature Blooms 1000 to 1600

Note: EC Calculations are different, here's a conversion chart :
heres a great chart that shows how different PPM can be from meter to meter... EC is the only real universal language...



Remember to discount the ppm of your water.

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May Peace and Joy be your companions.
Roseman's DIY Bubbleponics Tutorial - Marijuana Growing
Pics of OLD Grow on this Page

Great post roseman nice one

By discount, do you mean you do not include the ppm of your water in the overall ppm or you do?

Cheers

My tap water is `120 ppm, out of the faucet. So if I want a ppm of 720, I set it at 840, so I have 720 of nutes, plus the 120 ppm of the water.

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May Peace and Joy be your companions.
Roseman's DIY Bubbleponics Tutorial - Marijuana Growing
Pics of OLD Grow on this Page

Nice chart Roseman, nice

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Kali Mist/Colombian Red Haze journal

Here's my last grow AK47 and PPP in hempy journal

Both Canna, and General Hydroponics have nute calculaters on their sites. They dont say that they are for MJ. but Im sure they know what most people are using their nutes for. Im sure other nute co's. have the same info on their sites.

http://www.generalhydroponics.com/ge..._schedule.html


http://www.generalhydroponics.com/ge...US/fchcol.html

http://www.generalhydroponics.com/calculator/index.html

http://www.canna-hydroponics.ca/growguide

Also let the plant tell you how much nutes it needs. Not all strains take the same ppm's. Start weak and keeping raising slowly untill you see some burn starting. Use you ppm meter to keep track of how much your mixing to get a certain level. Of course this is just my opinon, and Im sure others here have other (better) advice.

What kind of nutes are you using? If you are using General Hydroponic nutes I would recommend Lucas Formula that you can find here

It deviates from the GH chart, the Lucas Formula is 8ml/gal Micro and 16 ml/gal Bloom, no grow. iirc the increased proportion of micro provides enough nitrogen. The nute solution is about ~1300 ppm and is suitable for all stages of flowering.

I add 1ml/gal of Floralicious Plus and mix in Liquid Koolbloom at different stages (as in the GH chart), ~5-7.5ml/gal takes the ppm to about 1400-1500 for me. I put rooted clones right in.

Even if you don't use GH, Lucas stresses that you should always use FULL STRENGTH nutes.

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Journal - Small SOG NL#5: 600w HPS Hydro Flowering, 250w MH Soil Mothers, 110w CFL Aero Cloner.

I use a Bluelab ppm Truncheon and it has all the different conversions on it: EC, CF, .5 ppm, and .7 ppm (Truncheon on the chart). Most people use the .7 conversion. It is the one on the left in the pic, was about ~$143 and worth every penny. It also has a five year warranty.

Attached Images

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Journal - Small SOG NL#5: 600w HPS Hydro Flowering, 250w MH Soil Mothers, 110w CFL Aero Cloner.

Hey thank you, that is exactly what I was looking for!