Planting Bed Gravel - Material Guide
Picking the right gravel for a planting bed gravel project? This guide covers the materials that fit best, how much you need, and what it costs delivered.
A solid planting bed gravel job comes down to three things: the right stone size, the right depth, and a base that drains. Get those right and the surface lasts 15 years before it needs a real top-up. Cut corners on any of them and you will be back out there with a rake inside two seasons. The numbers below come from real delivered jobs across our service area, not catalog specs.
Best materials for planting bed gravel
What planting bed gravel needs in a material
- Size and shape: topsoil blend with 3/8 inch decorative cap.
- Drainage: moderate, holds moisture for roots.
- Compaction: kept loose so roots can spread.
The three specs above drive every other choice on a planting bed gravel job. Order the wrong size and the surface fails fast. Pick a material that drains the wrong way and you fight standing water or washouts. Get these right and the install steps below take care of the rest.
How to install planting bed gravel
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1
Clear and edge
Pull weeds, install bed edging to hold material in place.
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2
Amend the soil
Till in 4 inches of topsoil or garden soil for root growth.
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3
Lay weed fabric
Roll permeable fabric over the soil, cut planting holes only where needed.
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4
Top with decorative stone
Spread 2 inches of pea gravel or river rock as the cap.
How much planting bed gravel material do you need
| Project size | 3 inch depth | 4 inch depth |
|---|---|---|
| 100 sq ft | 0.9 cu yd / 1.3 tons | 1.2 cu yd / 1.7 tons |
| 300 sq ft | 2.8 cu yd / 3.9 tons | 3.7 cu yd / 5.2 tons |
| 600 sq ft | 5.6 cu yd / 7.8 tons | 7.4 cu yd / 10.4 tons |
Quantities above assume crushed stone at roughly 1.4 tons per cubic yard. Pea gravel and river rock run a bit lighter, decomposed granite a bit denser. Add 10 percent waste for irregular shapes and edge losses.
What planting bed gravel costs in 2026
| Region | Delivered per ton | Typical 300 sq ft project |
|---|---|---|
| Northeast | $46 to $79 | $161 to $277 |
| Midwest | $35 to $62 | $123 to $217 |
| South | $33 to $59 | $116 to $207 |
| West | $53 to $97 | $186 to $340 |
Prices below are delivered per ton, full truck loads, 2026 service area pricing. Add 8 to 15 percent for half-loads under 12 tons and add fuel surcharges in volatile diesel markets. Bag drops and small-yard deliveries run higher per ton than the table shows.
Planting Bed Gravel mistakes to avoid
- Using stone over compacted clay, which suffocates plant roots.
- No edge, so stone migrates into the lawn and dulls the mower.
- Dark stone in full sun, which cooks the root zone.
- Skipping the soil amendment under the stone cap.