Sun-Mar Garden Composter 400

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SKU: CP14689

Temporarily out of stock (accepting backorders)


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Please contact us for a shipping estimate, or we will reach out to you after you place your order.

The 400 is considerably bigger than the 200, but otherwise it works on the same principle as the 200. The 400 is a continuous composter designed for composting kitchen scraps and cut up materials from small garden.

As with the 200, material is added to the 400 by sliding the input door open. To mix and aerate the compost, the 400 drum is rotated by turning a shaft on which a small gear bears directly against the gear teeth on the drum.

Compost is removed by opening the output port, rotating the drum and allowing compost to fall from the inner drum into a bushel basket or other container.


- Optional rollers, which can be snapped into the cradle base to make it easier to move the unit when it is on a hard surface.

- Sample bottle of Compost Swift which you can use diluted by 8 to 1 to help get your composter going. If you like it, 32 oz bottles are available.

- You are unlikely to need then but we are including 2 spare vent plugs and one spare drum cap in case you break one.


- Drum Volume: 366 Liters (approx: 11 bushel or 100 gallon)

- Height: 36"

- Depth: 28"

- Overall Length: 42"

- Product weight: 70 lbs

Pest-proof, patented double-drum design, UV stabolized and made from food grad polyethylene to last 10-15 years; these compost drums are continuous so you don't need to wait for one batch to finish before starting a new one. They're also fast usually providing great compost in just 3-4 weeks vs. up to 3-4 months with conventional composters. They're mainly designed for food waste and bulking material - wood shavings, peat, cocoa - though and don't work that well with leaves, grass, and common garden wastes. (Our cocoa-coir bricks make the perfect bulking material.) Best if moisture content stays between 40-60% and bigger things like whole onions are chopped up before putting in. 

*Note: We may need to ask for additional shipping charges depending on your location.

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