Special Fertilizers and Ingredients for organic farms

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Specialty Fertilizers + Ingredients Available at Dirt Works

If you're required to meet a standard set by your local certifying agency, consult with The Organic Material Research Instutute and the USDA.

 single bags

Alfalfa Meal~3-2-2

  • Recommended as a feed product but has the properties of a fertilizer as well.
  • Alfalfa meal is a soil amendment that many believe invigorates the biological activity in the soil.
  • Alfalfa is a protein feed for livestock and offers the same benefit to organisms in the soil.
  • It contains ~17 percent crude protein, which translates into 2.75 percent nitrogen.
  • Alfalfa meal also contains fiber and other substrates that feed populations of soil organisms.
  • Application rates are usually ~10#/1000ft2.
  • Alfalfa is registered as a feed, not a fertilizer, but is ~3-2-2
50lbs
2-50lbs
5-50lbs
40 bags per pallet - Call for Wholesale Price 802-385-1096
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Aragonite

A calcium carbonate mineral (like limestone) that comes from seashells, such as oyster shell. It is used in lieu of lime in situations where the soil is already high in magnesium, and where dolomite (high magnesium limestone) is the only liming material available.

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 Special Order Allow three weeks for delivery
Azomite: NaK2Ca5Al3Si21O706H2O

A hydrated sodium calcium aluminosilicate ground rock with other essential trace elements.
100% natural volcanic rock ground to a fine powder. It can be used as a feed supplement in poultry and used as a fertilizer. It's said to improve immune system function in poultry, thus lessening the need for antibiotics.
In plants, it is said to help produce larger root systems, bigger plants, more trace minerals in the produce itself and blight avoidance and/or reversal. Application rate is 1-2 lbs./10 ft2 or 1 600lbs./acre

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$46.00

44lbs

Black Rock Phosphate + Greensand + Bone Char

A high carbon black rock phosphate, semi-fine, dustless, sand like texture.
Total phosphate is 30%.
Guaranteed available phosphate is 3%.
Can be used in broadcast spreaders.
Builds phosphate fertility where levels are low to increase rooting activity in transplants and sprouting seeds.
Also mineralizes the soil and improves quality of crops and soil structure.
Its' slow release allows plants to use it before it is fixed.

General usage
Use to help plants adjust to transplant stress.
Phosphate rock cannot burn roots.
Directions for use
Apply 1-2 lbs per plant for tree or shrub transplants
(about a shovel load per sapling at transplant time).
To correct soil deficiencies, apply from 500-4,000 lbs per acre depending on severity of deficiencies.
Which one you choose will depend on your need and philosphy. Rock Phosphate contains less phosphate and releases more slowly than Bone Char and is a mined mineral. Bone Char contains much more available phosphate and releases more quickly than black rock phosphate. All these products are OMRI listed and can be used on certified organic farms and market gardens.
Product
Smaller sizes
50lbs
2/50lbs
Black Rock Phosphate/Phosphate Rock

0-3-0
$10.00

8 lbs
NEW! Bone Char

0-16-0
NA
Jersey Greensand
$9.50

10lbs
Black Rock Phosphate with Greensand
50:50
.
Bone Char/Greensand
25:75
.
.
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Bone Meal 4-12-0

All natural source of phosphorous; 100% pure bone meal, with no additives, also contains organic nitrogen.
For use with bulbs and all perennials at planting time.
Directions

For Lawns:
Apply in spring, summer, or fall at the rate of 5 lbs. per 100 square feet.
Bulbs & Gardens:
Apply at the rate of 10 lbs. per 100 square feet working well into soil.
Shrubs & Trees:
Apply 1 or 2 lbs. To shrub, tree, or bush depending upon size.
Distribute under entire spread of shrub or tree raking well into soil.
Do not use around plants that require an acidic soil without a soil test to determine that soil pH is too low.
Potted Plants:
Apply 2 ounces or about 1 heaping tablespoonful per pot; work into soil.

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30lbs

$29.95

5 lbs.

$9.95
Boron 14.3% Call special order
Boron 10%

Used as an ingredient in some general purpose fertilizers, it is good for the roots of fruit trees. A pinch goes a long way. Consult a professional or University Extension agent before use.

Call special order
Cottonseed Meal (6-2-1)

An excellent source of nitrogen for shrubs and trees. Can be finely sprinkled under the branch spread area of the tree or shrub. Apply about 5 lbs./100 ft.2 for planting beds.

4 lbs.
$7.99
Cottonseed Meal (6-1-1)

An excellent source of nitrogen for shrubs and trees. Can be finely sprinkled under the branch spread area of the tree or shrub. Cottonseed Meal is the ground meal from cottonseeds. Its analysis is 6-1-1. The nitrogen is almost 85 percent water insoluble. Cottonseed meal will acidify soil at a value of 9# CaCO3 (calcium carbonate or pure lime) per 100#. >In other words, it takes 9# of lime to neutralize the acidity caused by 100# of Cottonseed Meal. See also Vegetable Protein Meals in the General Information Section. Cottonseed meal is a feed grade material. Apply about 5 lbs./100 ft.2 for planting beds.

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$39.95
 N/A
For a fuller list of Espoma products in small bags, click here.
Crab Shell (2.5-3-.5) Ca 23

A good fertilizer and substitute for bonemeal, due to it's high concentration of calcium, although it isn't so high in phosphorous. tomatoes enjoy a healthy dose of crab shell due to it's high calcium content. Indoor plants like Geraniums will like it as well. It breaks down very slowly and looks just like crushed up crab shells when you open the container. Will not burn the soil or harm plants in any way. No specific application rates are recommended for this product. Depending on need, you can apply between 500 and 2,000 lbs per acre. A soil test is the determinant for any fertilizer application however. 1 cup per 20 quarts of potting soil works for transplants and repotting house plants. Crab shell is also high in chitin, which promotes the growth of chitin eating bacteria. The exoskeletons of fungus and nematodes eggs, as well as the jaw structures of some garden pests like the japanese beetle grub are high in chitin. Crab shell, when added to the soil, helps create a hostile environment for the fungus and nematodes by feeding the biological life that eats the chitin based organisms. It is not classified as a fungicide or a nematocide even though it is known to have these properties. Used as an additive in poultry feeds it has been known to improve shell integrity due to it's concentration of calcium.

12lbs. Pail
50 lbs. Bags
2 - 50lbs
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Dried Blood 12-0-0

A safe (slow and steady) source of organic nitrogen, produces more vigorous plants with deeper green color and larger, more beautiful blooms.

Rates of Application
  • Light feeding 1 pound per 100 square feet.
  • Medium feeding 2 pounds per 100 square feet.
  • Heavy feeding 4 pounds per 100 square feet.
50lbs-$85.00/each

Special order. Call for availability

4 lbs.
$9.00
Feather Meal

*Used as fertilizer and animal feed
Nitrogen is not water soluble in this product. Combined with Chilean Nitrate or Pro-Booster
You could make a high nitrogen fertilizer for long and short term release.
50lbs $65.00
2/$120.00
Gypsum

Calcium Sulfate with 22-23% available calcium and 15-18% sulfur. Pelletized to work easily in a broadcast spreader. It loosens heavy soils, aids soil aeration and water percolation. Leaches out excessive amounts of sodium and magnesium. Can counteract winter salt damage. Good for roadside gardens.

40lbs

$19.00

  4/$68.00
Peanut Meal (6-1-1)

Organic fertilizer derived from peanuts. Often used as an ingredient in other combined formulas of organic fertilizer.

 By the Pallet

Call