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How Much Pea Gravel for an 8x12 Greenhouse Floor?

How much pea gravel for an 8x12 greenhouse floor: about 1.2 tons at 3 inches deep. The area is 96 square feet, which is 0.89 cubic yards at that depth.

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The math

  1. Area: 96.0 sq ft.
  2. Depth in feet: 3 ÷ 12 = 0.250 ft.
  3. Cubic yards: 96.0 × 0.250 ÷ 27 = 0.89 yd³.
  4. Tons: × about 1.4 tons per yard = 1.2 tons.

The gravel calculator does this for any size.

Pea gravel needed by depth

DepthCubic yardsTons of pea gravelTons +10%
2 in0.590.80.9
3 in0.891.21.4
4 in1.191.71.8
6 in1.782.52.7

Building the greenhouse base

A stone floor drains spilled water, holds some heat and is easy to rake clean. Many growers use about 3 inches of pea gravel or washed stone over fabric, with paver or concrete stepping paths if they roll carts.

Before the stone goes in

Clear vegetation, rake the soil level and compact it. Lay fabric overlapped at the seams and set edging before spreading the stone.

Ordering and delivery

If you haul it yourself, a typical half-ton pickup should carry only about half a cubic yard of stone, well under what the bed looks like it can hold. Pea gravel is small and rounded, comfortable underfoot, and needs edging because it rolls. The scale ticket is the real weight; tons per yard here is a planning figure.

Tools for the job

A flat shovel, a steel rake, a wheelbarrow and a rented plate compactor cover most residential pads. A landscape rake or the back of a rake levels the top layer, and a long straightedge or a level string shows high and low spots before the final pass.

Planning the cost

Quarries and landscape suppliers set their own prices, and they change by region and season. Get the price per ton, the delivery fee and the minimum order. If two products will both work, compare cost per square foot at your depth rather than cost per ton.

Questions people ask

How many tons of pea gravel for an 8x12 greenhouse floor?

About 1.2 tons at 3 inches deep.

How many yards of pea gravel for an 8x12 greenhouse floor?

About 0.89 cubic yards.

How many tons of pea gravel are in a cubic yard?

Roughly 1.4 tons for planning, but suppliers vary with stone size and moisture.

Should I put landscape fabric under the stone?

On soft or clay soil, a woven geotextile keeps stone from sinking into the dirt and makes the layer last longer.

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