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ppm levels for cannabis

Reliable ppm chart for marijuana??

Merlin85
Member
Roseman
Elite Rolling Society

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.

sophanox
Well-Known Member

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?

Roseman
Elite Rolling Society

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?

Boneman
Well-Known Member
Well-Known Member

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.

Well-Known Member
Santos L Halper
Member

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.

Santos L Halper
Member

$143 and worth every penny. It also has a five year warranty.

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Merlin85
Member

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

monster kush
Member
cashmunny
Member

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.

justparanoid
Well-Known Member
MX450
Active Member
Artificial emotion
Well-Known Member
dmakk777
Member
Artificial emotion
Well-Known Member
pointswest
Active Member

The charts posted by the various companies only apply to their specific line of nutrients. You can not use formulas from other suppliers sites on a different brand. Every fertilizer is different so you have to follow the directions for the brand you are using, ie: General hydroponics application rates will not work with the Canna schedules and vice-versa.

You eventually have to start reading your plants instead of the labels on the products. Good growers do not need pre-printed formulas and rely on the signs and symptoms of the plant to determine when to use additives and fertilizers, not some pre printed schedule on the back of the fertilizer product. The label does not have eyes and does not know the condition of your plants, the ultimate decision to feed or not must rely upon your good judgment and knowledge of plant growth.

Recommendations by fertilizer companies are usually the maximum the plants can tolerate without burning so they can sell more ferts. Anything above 1250ppm in flowering is causing soft rapid cell growth reducing the ability of the plants to adjust to disease and pest pressures and drastic environmental changes.

When it comes to fertilizing, less is best. You can always add more if needed, but if over fertilized it is much harder to remove excessive fertilizer salts once added to the media.

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… ]]>