The north edge of Sandwich sits on the moraine the ice sheet pushed up, and everything south of it — Forestdale, the Route 130 corridor, out toward the Mashpee line — is the outwash plain that washed off it. Sand, twenty feet down.
Step 1 — Test before you buy anything
Outwash sand is typically acidic and low in organic matter, but "typically" is not your yard. A test from the UMass Soil and Plant Nutrient Testing Laboratory returns pH, organic matter and nutrient levels, and will tell you whether you need lime as much as compost. It costs a fraction of one load and it changes what you order.
Step 2 — Measure the lawn, not the lot
A quarter-acre lot is 10,890 square feet, but turf area after the house, driveway and beds is usually 5,000–6,000. Measure the grass, then use the formula behind every bulk order:
cubic yards = (square feet × depth in inches) ÷ 324
Step 3 — Decide whether to amend or import
This decision sets the cost of the project. Delivery is charged per load and soil caps at six yards per trip, so freight punishes deep imported layers.
| Approach | Area | Yards by formula | Order as | Loads | Freight at $210/load |
|---|---|---|---|---|---|
| 1" compost tilled in | 2,000 sq ft | 6.2 | 6 | 1 | $210 |
| 1" compost tilled in | 6,000 sq ft | 18.5 | 18 | 3 | $630 |
| 4" imported loam | 2,000 sq ft | 24.7 | 24 | 4 | $840 |
| 4" imported loam | 6,000 sq ft | 74.1 | 72 | 12 | $2,520 |
Seventy-two yards of loam across a quarter acre is a contractor job with a contractor budget. Compost at $50 a yard, tilled in, changes how the existing sand behaves for a quarter of the freight. Import Loam (Screened) when you are starting from bare graded sand, or doing just the front 1,500 square feet properly.
Step 4 — Order to the cap
Six yards costs the same freight as four, so if the maths says 4.2, order six and put the rest into the beds. And because loads count per line item, compost plus loam is two trips — $420 into Sandwich village.
Step 5 — Till it in, do not lay it on
Work the compost into the top six inches of existing sand so there is no hard boundary. A clean layer of loam on clean sand behaves like a shallow pot: roots hit the interface, turn sideways, and the whole thing dries from below.
Step 6 — Seed at the end of August, not now
This is the unhelpful part. Late June seeding on outwash sand is close to a waste of seed — the surface dries between waterings and germination is patchy. The Cape window is late August to mid-September. Do the soil work now and let the grade settle.
Step 7 — Water deep and infrequently
One inch twice a week beats a light daily sprinkle, which evaporates before it reaches the root zone and trains roots to stay shallow. Set a tuna can on the lawn and run the sprinkler until it fills.
What does it cost to get material to Sandwich?
Sandwich is about 57 driving miles out, so delivery is $210 to Sandwich, $218 to Forestdale and $220 to East Sandwich — per load. Browse bulk soil and loam and lawn levelling and repair materials, with addresses under Sandwich Landscape Supply. Beds have the same problem — see keeping a Cape raised bed watered. The Cape Cod Commission covers wetland-buffer rules.
Frequently asked questions
How deep does loam need to be over pure sand?
Four inches is the working minimum; six is better if you want to stop watering twice a week.
Can I just add compost every year instead?
Yes. A half-inch top-dress each spring builds organic matter steadily — slower, far cheaper in freight.
Do I need loam or topsoil?
For turf over sand, screened loam at $55 a yard is the balanced choice. Screened topsoil is the same price; Super Loam at $65 carries a higher organic fraction.
Put your Sandwich ZIP into the checker on any product page for an exact delivered price, or text (617) 286-2740 with your square footage and we will work the yardage out with you.
