How Much Crushed Stone for an 8x12 Greenhouse Floor?

How much crushed stone 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

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

The crushed stone calculator does this for any size.

Crushed stone needed by depth

Depth	Cubic yards	Tons of crushed stone	Tons +10%
2 in	0.59	0.8	0.9
3 in	0.89	1.2	1.4
4 in	1.19	1.7	1.8
6 in	1.78	2.5	2.7

Stone for a greenhouse

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.

Getting it delivered

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. Crushed stone has angular faces that lock together under a compactor, which is why it holds a pad shape. Ask your supplier for their own tons-per-yard number, since stone source and moisture change it.

Tools for the job

For anything bigger than a small path, rent a plate compactor; hand tampers cannot match it. A wheelbarrow, shovels, a hard rake and stakes with string are the rest of the kit. Wet the stone lightly before compacting so it binds.

Planning the cost

Stone is usually priced per ton or per cubic yard, and delivery is often a separate charge based on distance. A full truckload can cost less per ton than a partial one, so it can pay to combine projects. Ask whether the quote includes tax, delivery and any small-load fee before you compare yards.

Questions people ask

How many tons of crushed stone for an 8x12 greenhouse floor?

About 1.2 tons at 3 inches deep.

How many yards of crushed stone for an 8x12 greenhouse floor?

About 0.89 cubic yards.

How many tons of crushed stone 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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