crunching numbers

Ive begun calculating N, P, & K amounts, along with magnesium, calcium, and sulfur. I try to hit target amounts of these elements in my mixtures. I refer to a chart that has different minimum ppm's of these elements for veg and flower stages.

Ive noticed, using GH nutes, that...
- it is hard to reach target levels of nutrients without getting tip burn
- sulfur levels are way lower then the minimum value on the chart which asks for 60 ppm sulfur, i hit 12 -15
- i need higher levels of magnesium and calcium to keep plants happy
- plants seem to need more phosphorous and less potassium as flowering progresses

Please share your option, experience, or rants. I'm curious if anyone else calculates nutes like this and has noticed trends, has advice, resources, etc.
 

qaws83

Active Member
here's a list of material for composting etc / with NPK values.
Material Nitrogen Phosphoric acid Potash
Alfalfa hay 2.45 0.5 2.1
Apple fruit 0.05 0.02 0.1
Apple leaves 1 0.15 0.35
Apple pomace 0.2 0.02 0.15
Apple skin (ash) - 3.08 11.74
Banana skin (ash) - 3.25 41.76
Banana stalk (ash) - 2.34 49.4
Barley (grain) 1.75 0.75 0.5
Bat guano 6 9 -
Bean and pod 0.25 0.08 0.3
Beet waste 0.4 0.4 3
Beet waste (root) 0.25 0.1 0.5
Blood meal 15 1.3 0.7
Bone meal 4 21 0.2
Bone (ground and burned) - 34.7 -
Brewer's grains (wet) 0.9 0.5 0.05
Brigham tea (ash) - - 5.94
Cantaloupe rind (ash) - 9.77 12.21
Castor bean pomace 5.5 2.25 1.13
Cattail reed & water lilly 2.02 0.81 3.43
Cattail seed 0.98 0.39 1.71
Chicken manure 1.63 1.54 0.85
Coal ash (anthracite) - 0.125 0.125
Coal ash (bituminous) - 0.45 0.45
Cocoa shell dust 1.04 1.49 2.71
Coffee grounds 2.08 0.32 0.28
Coffee grounds (dried) 1.99 0.36 0.67
Corn (grain) 1.65 0.65 0.4
Corn (green forage) 0.3 0.13 0.33
Corncob (ground, charred) - - 2.01
Corncob (ash) - - 50
Cotton seed 3.15 1.25 1.15
Cottonseed meal 7 2.5 1.5
Cottonseed-hull (ash) - 8.7 23.93
Cotton waste 1.32 0.45 0.36
Cow manure (fresh) 0.29 0.17 0.1
Cowpea, green forage 0.45 0.12 0.45
Cowpes, seed 3.1 1 1.2
Crab (common) 1.95 3.6 0.2
Crab (king, dried and ground) 10 0.25 0.06
Crab (king, fresh) 2.3 - -
Crabgrass 0.66 0.19 0.71
Cucumber skin (ash) - 11.28 27.2
Dog manure (fresh) 1.97 9.95 0.3
Duck manure (fresh) 1.12 1.44 0.49
Egg 2.25 0.4 0.15
Eggshell (burned) - 0.43 0.29
Eggshell 1.19 0.38 0.14
Feather 15.3 - -
Felt hat factory waste 3.8 - 0.98
Field bean (seed) 4 1.2 1.3
Field bean (shell) 1.7 0.3 1.3
Fish scrap (red snapper) 7.76 13 0.38
Fish scrap (fresh) 6.5 3.75 -
Greasewood (ash) - - 12.61
Gluten feed 4.5 - -
Greensand - 1.5 5
Grape leaves 0.45 0.1 0.35
Grapes (fruit) 0.15 0.07 0.3
Grapefruit skin (ash) - 3.58 30.6
Hair 14 - -
Hare and rabbit waste 7 2.4 0.6
Hoof meal and horn dust 12.5 1.75 -
Horse manure (fresh) 0.44 0.17 0.35
Incinerator ash 0.24 5.15 2.33
Jellyfish (dried) 4.6 - -
Leather (acidulated) 7.5 - -
Leather (ground) 11 - -
Leather (ash) - 2.16 0.35
Lemon cull 0.15 0.06 0.26
Lemon skin - 6.3 31
Lobster (refuse) 4.5 3.5 -
Lobster (shell) 4.6 3.52 -
Milk 0.5 0.3 0.18
Mud (fresh water) 1.37 0.26 0.22
Mud (harbour) 0.99 0.77 0.05
Mussel 0.9 0.12 0.13
Mussel mud (dried) 0.72 0.35 -
Molasses residue (brewing) 0.7 - 5.32
Moss 0.6 0.1 0.55
Oak leaf 0.8 0.35 0.15
Oats grain 2 0.8 0.6
Olive pomace 1.15 0.78 1.26
Olive refuse 1.22 0.18 0.32
Orange cull 0.2 0.13 0.21
Orange skin (ash) - 2.9 27
Oyster shell 0.36 10.38 0.09
Paint processing waste 0.02 39.5 -
Pea pod (ash) - 1.79 9
Peach leaf 0.9 0.15 0.6
Peanut (seed & kernel) 3.6 0.7 4.5
Peanut shell 0.8 0.15 0.5
Peanut shell (ash) - 1.23 6.45
Pigeon manure (fresh) 4.19 2.24 1.41
Pig manue (fresh) 0.6 0.41 0.13
Pigweed (rough) 0.6 0.16 -
Pine needle 0.46 0.12 0.03
Potato (tuber) 0.35 0.15 0.5
Potato (leaf and stalk) 0.6 0.15 0.45
Potato skin (ash) - 5.18 27.5
Poudrette 1.46 3.68 0.48
Powderworks waste 2.5 - 17
Prune refuse 0.18 0.7 0.31
Pumpkin (fresh) 0.16 0.07 0.26
Pumpkin seed 0.87 0.5 0.45
Rabbit brush (ash) - - 13.04
Ragweed 0.76 0.26 -
Redtop hay 1.2 0.35 1
Rhubarb stem 0.1 0.04 0.35
Rockweed 1.9 0.25 3.68
Rose (flower) 0.3 0.1 0.4
Salt-marsh hay 1.1 0.25 0.75
Salt mud 0.4 - -
Sardine scrap 7.97 7.11 -
Seawood 1.68 0.75 4.93
Sheep manure (fresh) 0.55 0.31 0.15
Shoddy and felt 8 - -
Shrimp head (dried) 7.82 4.2 -
Shrimp waste 2.87 9.95 -
Silt waste 9.5 - -
Silk mill waste 8.37 1.14 0.12
Silk worm cocoon 9.42 1.82 1.08
Sludge 2 1.9 0.3
Sludge (activated) 5 3.25 0.6
Sludge from sewer beds 0.74 0.33 0.24
Soot from chimney fllue 5.25 1.05 0.35
Starfish 1.8 0.2 0.25
Sunflower seed 2.25 1.25 0.79
Sugar (raw, residue) 1.14 8.33 -
Sweet potato skins (ash) - 3.29 13.89
Sweet potato 0.25 0.1 0.5
Tanbark (ash) - 0.34 3.8
Tanbark ash (spent) - 1.75 2
Tankage 6 5 -
Tea grounds 4.15 0.62 0.4
Tea leaves (ash) - 1.6 0.44
Timothy hay 1.25 0.55 1
Tobacco leaves 4 0.5 6
Tobacco stalk 3.7 0.65 4.5
Tobacco stem 2.5 0.9 7
Tomato fruit 0.2 0.07 0.35
Tomato leaves 0.35 0.1 0.4
Tomato stalk 0.35 0.1 0.5
Wheat, bran 2.65 2.9 1.6
Wheat grain 2 0.85 0.5
Wheat straw 0.5 0.15 0.6
White clover (green) 0.5 0.2 0.3
White sage (ash) - - 13.77
Wood ash (leached) - 1.25 2
Wood ash (unleached) - 1.5 7
Wool waste 5.5 3 2
Found the npk list which is rather helpful but can't locate the list with additives frankly though dont take anything to seriously doing your own homework on what reacts well tends to work far better than any chart theres my advise hope it goes well man
 
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