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Dark Harbor Blend Enriching Mulch


Dark Harbor Blend Enriching Mulch


Dark Harbor Blend Enriching Mulch is an exceptionally rich, naturally dark, fine textured blend of composted bark. It helps retain moisture and insulate the surface soil against temperature variations that can harm roots. Because it is composted, it will not rob the soil of nitrogen and can be dug into the beds in the fall to improve the organic content of the soil.


Product Highlight Features:

  • For mulching beds & shrubs.
  • Made with naturally composted aged dark bark.
  • Helps prevent weeds & retain moisture.
  • Designed specifically for mulching perennials and annual beds and around roses, shrubs and trees.
  • Made with premium ingredients.


Available in 1 & 2 cubic foot bags


Target pH 6.3


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Healthy soil is the key to healthy plants

The key to successful growing is soil quality. Healthy soil that is rich in organic material means healthy, disease resistant plants that require less watering and feeding.

recycleOrganic material is naturally recycled plant and animal matter that has been allowed to decompose slowly and return to the soil. In a word, COMPOST! The finest compost-based soils and mulches combine decomposed marine and plant matter teeming with the naturally occurring micro-organisms all plants need for healthy growth.

Here at Coast of Maine we are proud of the quality of our composts. We start with carefully designed and tested recipes and the very best ingredients. Just as important, we pay close attention to detail throughout the composting process. That means frequent turning, sampling and testing and a lengthy aging and curing process.

Dark Harbor Blend is a unique, naturally composted mulch.

Remember, healthy soil is the key to growing healthy plants.

We use all natural ingredients

treeDark Harbor Blend is a dark, rich mixture of soft and hardwood barks that have been allowed to compost naturally for  over 50 years. It is both well decomposed and finely textured and will not rob nitrogen from your soil (as raw mulches may).

Dark Harbor Blend is designed specifically for mulching perennials and annual beds and around roses, shrubs and trees. It is carefully formulated from natural ingredients to provide insulation, weed suppression, excellent drainage and a wonderful source of organic material.

Follow these few, simple steps

planting3Mulching in early spring:
Every year in the spring lay down a layer of 2 to 3 inches of Dark Harbor Blend around small perennials, annuals and newly planted flower and vegetable seedlings. With larger plants, shrubs and trees you can apply Dark Harbor Blend to a depth of 4 inches. This will ensure maximum protection and enhance appearance.

shovelMulching in mid summer:
Dark Harbor Blend will help insulate and hold moisture in your soil. You may want to add an additional inch or two in July to add further protection in the event of a hot, dry summer.

Mulching in fall:
Because the bark in Dark Harbor Blend is almost completely decomposed, it can be dug into beds and gardens in the fall, providing your soil with a rich and immediate source of organic material. You may want to add a bag or two of Coast of Maine’s Quoddy Blend Lobster Compost to add additional organic material to your soil that will pay dividends in the spring.

rakeSoil Conditioner:
You can also use Dark Harbor Blend as a soil conditioner. With poor soils, work as much as 2 inches into the top 4 to 6 inches of soil. To maintain healthy soils and for heavy feeders like roses and most vegetables, 1 inch of Dark Harbor Blend is sufficient. For normal feeders like herbs and flowering plants, 1/2 an inch will do.

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