Compostar Compost Inoculant

One of the Best Compost Inoculants Available

Item Number: ICO200


In Stock! Ships from Northern CA.


In Stock! Ships from Northern CA.

Buy Big, Save Big! As low as $3.19 each!
  • Buy 16 for $3.59 each
  • Buy 80 for $3.19 each


Developed by a world renowned microbiologist, this inoculant contains multiple strains of aerobic bacteria, fungi, actinomycetes, and other beneficial microbes. Suitable for composting straw, wood chips, food waste, manures and other green matter.

  • Can handle a carbon to nitrogen ratio of up to 50
  • Use 2-3 oz of dry inoculant per ton (1-2 yd) of composting material
  • Pre-blend into a liquid, mix 2 oz. Compostar with 2 quarts of water (do not use chlorinated water). Let stand for 2-48 hours. After allowing mix to stand, add mix to 1-2 gallons of water.
  • Complete instructions can be found under the "Use Instructions" link

Preparing Compost: Starting C:N ratio should not exceed 50:1. When working with high C:N materials, add materials with a low C:N ratio, such as fresh green material or manures. It is best to shred or cut the materials into small sized particles. Moisture within the pile should range between 45-65%.

Apply the liquefied Compostar uniformly with the organic wastes to be composted. Place the mixed materials into piles or windrows in a covered area to protect from rain (or cover with a breathable fabric). Ideal height of the pile or windrow is between 60-84”.

Check pile temperature every few days and when the temperature begins to fall, turn the pile and remoisten with water if necessary. Composting process should take about 4 weeks to finish depending on particle size, C:N ratio of raw materials, moisture and aeration.

Caution: If eye contact should occur, wash with plenty of water. Avoid breathing mist. Do not take internally. Keep out of reach of children.


  • Improves Soil Biology

Useful Information

Use Instructions

Videos & Articles



What You May Need

Shipping Information

Cannot ship to the following states: CA.

Shipping Weight: 0.10 lbs. Dimensions: 3"L x 2"W x 0.1"H


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