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Organic Nutrient List


420 Staff
Organic Nutrient List

This is a list of Organic nutrients obtained from the Marijuana Cultivation Bible.


Organic Nutrient Chart


Rabbit manure N= 2.4 P= 1.4 K= 0.6
comments- Most concentrated of animal manures in fresh form.

Cow manure (dairy) N= 0.6 P= 0.2 K= 0.5
comments- Often contains weed seeds, should be hot composted.

Steer manure N= 0.7 P= 0.3 K= 0.4
comments- Often contains weed seeds, should be hot composted if fresh.

Chicken manure N= 1.1 P= 0.8 K= 0.5
comments- Fast acting, breaks down quickest of all manures. Use carefully, may burn. Also, stinks like hell - composting definitely recommended.

Horse manure N= 0.7 P= 0.3 K= 0.6
comments- Medium breakdown time.

Duck manure N= 0.6 P= 1.4 K= 0.5

Sheep manure N= 0.7 P= 0.3 K= 0.9

Worm castings N= 0.5 P= 0.5 K= 0.3
comments- 50% organic material plus 11 trace minerals. Great for seedlings, will not burn. Is a form of compost, so doesn't need composting.

Desert Bat Guano N= 8 P= 4 K= 1
comments- Also contains trace elements. Fast-acting, mix in soil or as tea (1 C guano to 5 gal. water).

Cave Bat Guano N= 3 P= 10 K= 1

Fossilized Seabird Guano N= 1 P= 10 K= 1
comments- Slow release over 3 to 12 weeks, best used as an addition to potting mix.

Peruvian Seabird Guano (pelletized) N= 12 P= 12 K= 2.5
comments- Legendary fertilizer of the Incas. Use in soil as a long lasting fertilizer, or make into tea (1 tsp pellets to 1 gallon water).

Note: it is recommended to first compost any fresh manure before you use it for 2 reasons:

1. to lessen the chance of harmful pathogens.
2. to break down the manure to make it more usable to the plant (and reduce the smell!)

The rates for pig or human manure are not listed because of the high rate of harmful pathogens they contain.


Organic Meals

Blood Meal N= 11 P= 0 K= 0
comments- Highest N of all organic sources, very fast acting if made into tea.

Bone Meal (steamed) N= 1 P= 11 K= 0
comments- Releases nutrients slowly. Caution: European farmers should not use because of the risk of spreading Mad Cow Disease; growers elsewhere may face the same issue.

Cottonseed Meal N= 6 P= 2.5 K= 1.5
comments- If farming organically, check the source. May be heavily treated with pesticides.

Fish Scrap N= 5 P= 3 K= 3
comments- Use in compost or work in soil several months before using. Usually slightly alkaline.

Fish Emulsion N= 4 P= 1 K= 1
comments- Also adds 5% sulfur. Good N source for seedlings, won't burn.

Kelp Meal N= 1 P= 0.5 K= 2.5
comments- Provides 60 trace elements, plus growth-promoting hormones and enzymes.

Soybean Meal N= 7 P= 0.5 K= 2.5
comments- None

Coffee Grounds N= 2 P= 0.3 K= 0.2
comments- Highly acidic, best for use in alkaline soils.



Greensand N= 0 P= 1.5 K= 7
comments- Mined from old ocean deposits; used as soil conditioner; it holds water and is high in iron, magnesium, and silica - 32 trace minerals in all.

Eggshells N= 1.2 P= 0.4 K= 0.1
comments- Contais calcium plus trace minerals. Dry first, then grind to powder.

Limestone (dolomitic) N= 0 P= 0 K= 0
comments- Raises pH, 51% calcium and 40% magnesium.

Limestone (calcitic) N= 0 P= 0 K= 0
comments- Raises pH, 65-80% calcium, 3-15% magnesium.

Crustacean Shells N= 4.6 P= 3.52 K= 0
comments- Contain large amounts of lime. Should be ground as finely as possible for best results.

Wood Ashes N= 0 P= 1.5 K= 7
comments- Very fast acting and highly alkaline (usually used to raise pH). Contains many micronutrients.

Crushed Granite N= 0 P= 0 K= 5
comments- Contains 67% silicas and 19 trace minerals. Slow release over a long period of time.

Rock Phosphate N= 0 P= 3 K= 0
comments- Contains 11 trace minerals. Slow release over a long period of time.

Epsom Salts N= 0 P= 0 K= 0
comments- Provides Mg and acts as a balancer.


Soil Amendments and Organic Material

Cornstalks N= 0.75 P= 0.4 K= 0.9
comments- Break down slowly; excellent soil conditioner. Should be shredded.

Oak Leaves N= 0.8 P= 0.35 K= 0.15
comments- Break down slowly, shred for best results. Good soil conditioner.

Feathers N= 15 P= 0 K= 0
comments- Chop or shred finely for best results.

Hair N= 14 P= 0 K= 0
comments- Good soil conditioner, oils break down slowly. Chop or shred finely for best results.

Sources include: Rodale Encyclopedia of Organic Gardening, The Deluxe Marijuana Growers Guide (Frank and Rosenthal)


Organic Fertilizers - Composition

Organic soil composition involves creating a soil medium that has a balanced amount of nutrients - NPK as well as trace elements and minerals - plus organic material that provides food for not only the plant, but also the countless soil microorganisms, fungi, worms, and bacteria that comprise a healthy soil. This soil life breaks down the raw materials of the fertilizers you add so the plants can absorb them, and also plays a part in as-yet undefined processes that aid plant growth and improve soil health.

Below are various "recipes" for both organic fertilizers and organic soil mixes.

Mix and match formulas

Pick one source from each category. The results will vary in composition from 1-2-1 to 4-6-3, but any mixture will provide a balanced supply of nutrients that will be steadily available to plants and encourage soil microorganisms.


* 2 parts blood meal
* 3 parts fish meal


* 3 parts bone meal
* 6 parts rock phosphate or colloidal phosphate


* 1 part kelp meal
* 6 parts greensand

source: Rodale Encyclopedia of Organic Gardening

More Organic Fertilizer Mixes

2 - 3.5 - 2.5

* 1 part bone meal
* 3 parts alfalfa hay
* 2 parts greensand

2 - 4 - 2

* 4 parts coffee grounds
* 1 part bone meal
* 1 part wood ashes

2 - 4 - 2

* 1 part leather dust
* 1 part bone meal
* 3 parts granite dust

2 - 8 - 2

* 3 parts greensand
* 2 parts seaweed
* 1 part dried blood
* 2 parts phosphate rock

2 - 13 - 2.5

* 1 part cottonseed meal
* 2 parts phosphate rock
* 2 parts seaweed

3.5 - 5.5 - 3.5

* 2 parts cottonseed meal
* 1 part colloidal phosphate
* 2 parts granite dust

2.5 - 6 - 5

* 1 part dried blood
* 1 part phosphate rock
* 4 parts wood ashes

0 - 5 - 4

* 1 part phosphate rock
* 3 parts greensand
* 2 parts wood ashes

3 - 6 - 3

* 1 part leather dust
* 1 part phosphate rock
* 3 parts seaweed

3 - 7 - 5

* 1 part dried blood
* 1 part phosphate rock
* 3 parts wood ashes

3 - 8 - 5

* 1 part leather dust
* 1 part phosphate rock
* 1 part fish scrap
* 4 parts wood ashes

2.5 - 2.5 - 4

* 3 parts granite dust
* 1 part dried blood
* 1 part bone meal
* 5 parts seaweed

4 - 5 - 4

* 2 parts dried blood
* 1 part phosphate rock
* 4 parts wood ashes

6 - 8 - 3

* 2 parts fish scrap
* 2 parts dried blood
* 1 part cottonseed meal
* 1 part wood ashes
* 1 part phosphate rock
* 1 part granite dust


Herbal Tea Plant Food

* 1 t Comfrey leaves
* 1 t Alfalfa leaves
* 1 t Nettle leaves
* 1 Qt boiling water

Steep for 10 min. and let cool until luke warm. Drain the leaves out and add the luke warm tea to your plants to keep them healthy and vibrant!

The reason for adding slightly warm tea (or water) to your plants is that they will be able to absorb the needed nutrients more easily by keeping the root pores open verses cold tea (or water) will have a tendency to restrict the pores, meaning a much slower process of absorption.

Comfrey is called knitbone or healing herb. It is high in calcium, potassium and phosphorus, and also rich in vitamins A and C. The nutrients present in comfrey actually assist in the healing process since it contains allantoin.
Alfalfa is one of the most powerful nitrogen - fixers of all the legumes. It is strong in iron and is a good source of phosphorus, potassium, magnesium and trace minerals.
Nettles are helpful to stimulate fermentation in compost or manure piles and this helps to break down other organic materials in your planting soil. The plant is said to contail carbonic acid and ammonia which may be the fermentation factor. Nettles are rich in iron and have as much protein as cottonseed meal.

amacian Bat Guano
N-P-K 1-10-0

Earthworm Castings
1-0-0 have 1% calcium and 0.2% iron

I usually mix a combo of PSG and Jamacian Guanos during flower. And a mix of PSG and high N guano (mexican) for veg. of course add a little bit of Kelp meal for extra K... Some people dont care about K but i do.

courtesy of Organic Plant Care of New Hampshire

Keith Lake

Human Resources
420 Staff
Who's the author of the marijauna cultivation bible?
It's an anonymous work;)

I've searched and searched for the author and have found numerous examples of reprints - both in full and in part but none where the work was cited or (legitimately) credited.

We always wish to credit authors for their original works and appreciate any help our members can provide in keeping our content properly cited and referenced.

In this instance we've credited to the maximum extent of our ability.


New Member
I made a Compost tea using the following. Neptune's harvet fish and seaweed, kelp, molasses, budswell (bat and seabird guano with worm castings.
Brave doing that in your tub. Worm castings stink in teas not to mention the awsome staining power of all the ingredients! I make very similar teas but do outside in ten gallon buckets. I notice with more worm castings that when the microbes start breeding it causes loads of foam and can overspill the top of the bucket.

Be Irie

Nug of the Year: 2009 - Plant of the Month: Aug & Sept 2008, Dec 2008, Jan 2009 - Member of the Month: Feb 2009 - Nug of the Month: May 2008, Jan & Feb 2009, Nov 2012


New Member
When it starts foaming it is telling you all the life in there is hungry... Add some molasses to the mix, it will feed all the life you are creating.....
didnt know that. Its hit or miss when i pour the molasses in. bottle sits with all my other nutes. honestly I thought it was more temp related because in the winter my tea mixes didnt foam so much outside. I figured that it was a bit cold for microbes and the higher temp of spring encouraged growth causing the foam.

But you say the foam is the microbes needing sugars to feed on huh? Why is that?

Be Irie

Nug of the Year: 2009 - Plant of the Month: Aug & Sept 2008, Dec 2008, Jan 2009 - Member of the Month: Feb 2009 - Nug of the Month: May 2008, Jan & Feb 2009, Nov 2012
As the food in the tea becomes scarce for the micro-life, it will begin to search out food. (i.e. The Foam) You will notice as you feed your micro-life that the foam will stop till they have eaten all of the food. The micro-life will feed on the molasses, and humic acid which will aid in multiplcation.


New Member
Right on. Next time I brew a big batch...maybe tonight...I will wait till I see the foam then add some molasses. It usually takes 10-12 hours before it ever gets to that point.

On another note, I do not like to use worm castings in my teas in the summer (AZ) due to smell, It can stink like raw sewage bubbling away in the heat. I have really turned to bat guanos for the basis of my teas. I like to mix some Peace-of-Mind dry ferts in there as well. Usually the yard formula 8-2-6 and the fruit and flower 5-8-4. I believe in bio-diversity with the organic nutes.


New Member
Wow, thanks! I am especially keen on vegan organics due to great results in ornamental landscaping (my previous life). I had much less problems with pests outdoors and less odors. Especially great in container gardening. I am looking forward to trying my old techniques from making millionaires houses pretty in the grow room. Any advice on vegan organics for indoor cultivation would be greatly appreciated. If you are near Seattle check out Walt's Organics on Leary way in Ballard. Best I've found. Fresh and effective. Wish he was in Cali.

up side down

New Member
I stuck a couple of hundred in 4 2.5 gallon containers and the next morning I had dried up worms all over my grow room. They stink up the place if you don't find em all. LOL
Yeah, worm will shoot the coop if you chance what they have been eating suddenly like that. Best to put some whatever you are growing in, in bucket you can cover for a couple of days, add the worms when you look and worms had gone down in dirt, (24 for so hours, then add that dirt to your plants container. Making the soil higher up stalk won't hurt, just encourage more roots to grow.

Interesting post, Thank you, worth bookmarking. :)
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