Available in 4 sizes

1LB Box, 5LB Box, 25LB Bag, 50LB Bag

Help prevent calcium deficiencies that can diminish plant development

Down To Earth’s Oyster Shell is an all-natural and high-quality source of the essential plant nutrient calcium. Ancient oyster shells are carefully harvested and then ground into small, medium and coarse particles. These irregular shapes provide a sustained release of this valuable nutrient. DTE Oyster Shell also aids in improving structure of soils and building optimum tilth.

CALCIUM (Ca) 35.0%

Derived from:

Ground Oyster Shell

Listed by the Organic Materials Review Institute for use in organic production.

2 cups ≈ 1 lb; 1/2 cup ≈ 4 oz; 1 tbsp ≈ 0.5 oz

Vegetable Gardens & Flower Beds:
To prepare new gardens, apply 2.5-5 lbs per 100 square feet and thoroughly mix into the top 3″ of garden soil in spring or fall. For new transplants, add 1-2 tsp per hole, mix into soil and water in well.

Outdoor Containers:
For new plantings, add 1-2 tbsp per gallon of soil and mix thoroughly OR add 0.5-1 lb per cubic yard. For established plants, lightly mix 1-2 tbsp per gallon into the soil surface every other month during the growing season.

Lawns:
In spring and fall, apply 2.5-5 lbs per 100 square feet and water in well. Results may be enhanced if applied following aeration.

Trees & Shrubs:
Spread 1 lb per 1″ of trunk diameter around the base outwards to the drip line, mix into soil surface and water in well. For new trees, prepare transplant hole and mix 1-2 cups with the backfill soil. Use the amended soil to fill in around the new tree; water in well.

Row Crops/Acreage:
Apply 500-2,000 lbs per acre initially followed by annual maintenance applications depending on soil analysis and crop requirements.

Buy Oyster Shell Direct from our Retail Store

We hand pick, pack and ship your order in Eugene, Oregon!