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Bumper Crop Soil Builder

(Does not include delivery fee)

A blend of lobster and crab shell meal blended with compost, sphagnum peat moss and aged bark.  Inoculated with endo and ecto mycorrhizal fungi to improve root function.  Everything your plants need in one bag! OMRI Listed.


Available in 1 & 2 cubic foot bags at selected retailers.


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A premium soil builder created exclusively by MASTER NURSERY® Garden Centers, BUMPER CROP® SOIL BUILDER contains only the finest all natural, rich, organic composted ingredients. This versatile soil amendment is excellent for all the garden uses listed below.


Bumper Crop® Soil Builder can greatly improve the quality of your garden soil. It will loosen clay and other hard, compacted earths, improving drainage, planting texture, and aeration. It will help bind sandy or rocky soils to promote water retention. In all kinds of garden soils, Bumper Crop® Soil Builder will make cultivation easier, provide better moisture absorption and retention, increase all-around soil aeration and provide a beneficial environment for micro-organisms.


Bumper Crop® Soil Builder has been formulated especially with the vegetable gardener in mind! Before planting, spread a 2–3 inch layer of Bumper Crop® Soil Builder over the area to be planted. Work it into the soil to a depth of about 6 inches. Water the area before planting to make sure the soil is moist. After planting, water again thoroughly.


Use Bumper Crop® Soil Builder for all of your in-ground flower planting. Spread a 2–3 inch layer of Bumper Crop® Soil Builder. Work it into the soil to a depth of about 6 inches. Water well before and after planting.


Dig a hole that is about twice as large as the size of the container. Dig the hole in a way that the sides taper outward into the soil as the hole gets deeper, somewhat like an upside down cone. Dig so that the sides of the hole are rough and not smooth; use a spading fork, if necessary, to make the sides of the hole coarse.

To minimize the settling of the plant, make the hole a bit shallower in the middle of the hole, but dig deeper around the side of the hole. Loosen the roots after removing the plant from the container or peel back the burlap from around the root ball so it will be completely covered by the back fill. Set the plant in the middle of the hole and make sure that the plant’s original soil line is about 2 inches above the soil line of the hole. If planting either a container or bare-root plant, spread the roots around the hole, making sure that the roots are not crowded against the side of the hole. Hold the plant and fill the hole with a mixture of half Bumper Crop® Soil Builder and half garden soil.


Before planting, prepare the lawn site by covering it with a 2–3 inch layer of Bumper Crop® Soil Builder. Work Bumper Crop® Soil Builder into the soil to a depth of about 6 inches, making sure it is well blended. Sow the lawn seed evenly over the area according to the instructions on the lawn seed package. Cover the seed with another layer of 1/8 inch Bumper Crop® Soil Builder. Next, rake the area lightly. Then water gently, but thoroughly. Keep the area moist until the seed has germinated and the grass is well up.


Liven up your older lawn using Bumper Crop® Soil Builder. First spike thoroughly for good aeration. Next, spread a 1/2 inch layer of Bumper Crop® Soil Builder over the surface. Work the mixture into the grass using a flexible lawn rake. Broadcast new grass seed onto the area according to instructions on the grass seed package. Water gently and often until the new grass seed germinates.


Bumper Crop® Soil Builder used as a mulch will help protect plant roots from soil erosion and temperature extremes. It will also help retain soil moisture and retard weed growth. Simply spread a layer of Bumper Crop® Soil Builder 1 to 3 inches deep on the ground surface around your plants.


Endomycorrhizal fungi colonize approximately 80% of the world’s plant species, including most vegetables, fruit trees and shrubs, flowering plants, grasses, legumes and many more. Ectomycorrhizal fungi colonize approximately an additional 7% of the world’s plant species including most conifers and a few broadleaf trees such as oak, elm, poplar, birch and beech. For more information about mycorrhizae visit: Store this bag in a cool, dry, shaded place, avoiding direct sunlight.

Contains 135.11 viable mycorrhizal propagules per cubic centimeter (cc) of the following organisms:

Ecto Mycorrhizae species:
Pisolithus tinctorius @105.04 spores/cc
Rhizopogon roseolus @005.00 spores/cc
Rhizopogon subscaerelescens @005.00 spores/cc
Rhizopogon villosulus @005.00 spores/cc
Rhizopogon vulgaris @005.00 spores/cc
Scleroderma cepa @005.00 spores/cc
Scleroderma citrinni @005.00 spores/cc
Endo Mycorrhizae species:
Glomus intraradices @ 00.07 spores/cc

Worm Castings are full of biologically activated minerals, the best manure for the soil comes from the soil! Lobster and Crab Shells are rich in chitin and help make plants strong and disease resistant. Kelp Meal stimulates soil bacteria helping to increase soil fertility. Dehydrated Poultry Manure is great for growing green and vigorous plants. Sphagnum Peat Moss provides a stable environment for root growth and helps hold water and maintain pore space. Composted Cow Manure brings active biology and is rich in organic matter plant roots need. Aged Bark provides organic matter in the form of spongy pieces of decayed wood and bark adding structure and holding moisture. Dolomitic Lime added to adjust pH.


This product meets the organic production standards of the Organic Materials Review Institute (OMRI) and is OMRI listed for organic production. Download the OMRI certificate here.


This Master Nursery product is guaranteed to perform as outlined on this container to the complete satisfaction of the purchaser or a full refund of the purchase price will be made. Refund will be made upon receipt of this warranty and a register receipt showing proof of purchase at participating Master Nursery Garden Centers or at the office of the Master Nursery Garden Center, Inc., 190 South Orchard Ave., Suite B230, Vacaville, CA 95688

Produced by Coast of Maine Organic Products, Inc., 145 Newbury Street, Portland, Maine, 04101 For Master Nursery Garden Centers, Inc.

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