How to Make a Gravel Patio Garden: Base Plus Pockets
Here is how to make a gravel patio garden. Choose angular gravel that packs into a firm surface, lay it at a practical depth with an edge, then plant pockets with drought tolerant plants. University of California Master Gardeners say angular gravel suits patios with lots of foot traffic.
The short answer
Use angular gravel at least two inches deep inside a firm edge. UC Master Gardeners say angular gravel such as decomposed granite packs down to a nearly solid surface. Allow four inches if large stones or pavers go in. Colorado State University Extension says gravel mulch lets water drain from plant crowns quickly.
How is a firm gravel base built?
UC Master Gardeners say two inches is a practical minimum depth. Allow for four inches if thick stones or pavers will be incorporated.
Sketch out the area and note the measurements before you order. Gravel can be bought by the bag or pickup load, or larger loads can be delivered.
Oregon State University Extension describes compacting the ground with a compacting machine before laying base. It suggests spreading crushed rock base in three layers and compacting between each.
Which gravel suits patios?
UC Master Gardeners say angular gravel packs down to a nearly solid surface. That makes it more useful for paths and patios with lots of foot traffic.
River run gravel such as pea gravel never packs down completely. The pieces slip and slide, so it is harder to walk on or set furniture on.
The smaller the pieces, the more comfortable the surface is for walking. White gravel creates glare, while very dark colors show every bit of litter.
| Choice | Use | Source note |
|---|---|---|
| Angular gravel | Patios with foot traffic | Packs to a nearly solid surface |
| Pea gravel | Light use | Never packs down completely |
| Two inch layer | Most gravel areas | Practical minimum depth |
| Four inch layer | Areas with stones or pavers | Allows for thick stones |
Source: UC Master Gardeners plus Colorado State University Extension.
Where should planting pockets go?
UC Master Gardeners note that gravel is easy to change. If you later choose to plant a graveled area, it is simple to move the gravel aside.
Colorado State University Extension says gravel mulch can benefit many native plus drought tolerant plants. It lets water drain quickly away from their crowns.
Plan where pockets go before laying gravel, and clear turf and weeds first. Colorado State says to be sure turf and weeds are completely dead or removed before proceeding.
How to: step by step
- Sketch the patio and record measurements.
- Remove turf and weeds from the area.
- Mark planting pockets on the plan.
- Install an edge around the gravel area.
- Spread angular gravel at least two inches deep.
- Plant drought tolerant plants in the pockets.
Troubleshooting
Gravel shifting underfoot: rounded gravel. Use angular gravel.
Gravel spilling into beds: no border. Add an edge.
Weeds in gravel: seeds on top. Pull them early.
For related reading see planning an outdoor cannabis garden layout, soil drainage check for cannabis beds plus watering cannabis during drought. Kind Seed Co also stocks cannabis seeds.
Sources
- Gravel pathways in the garden, UC ANR Master Gardeners
- 10 step guide to installing pavers, Oregon State University Extension Service
- Xeriscaping: retrofit your yard, Colorado State University Extension
- Building brick walks plus patios, University of Missouri Extension, via MOspace
FAQ
Do gravel patios need edging?
UC Master Gardeners say a border stops gravel from migrating into adjacent soil and gives a manicured look. Options include bender board or its plastic imitators, rock, pavers, bricks or lumber. Oregon State University Extension also lists edge restraints as a key step for paver areas.
Can furniture sit on gravel?
UC Master Gardeners say gravel can work for patios if large stones are incorporated for supporting furniture. Angular gravel that packs down helps more than pea gravel, which never packs down completely. Loose rounded pieces slip and slide, so chairs and tables are harder to set on them.
How do you limit weeds in gravel?
UC Master Gardeners say fabric under gravel is debated. It can suppress weed growth from below, but it does nothing to stop weed seeds that land on top from germinating. Colorado State University Extension says weed fabric does not actually prevent weed growth in permanent plantings.
Should a gravel patio slope?
Oregon State University Extension says a paved slab should slope down away from the house to allow water drainage. It describes giving the area a gradient so water runs off instead of pooling. The same idea applies when you set the grade before spreading gravel on a patio.
Is gravel cheaper than pavers?
UC Master Gardeners say gravel is generally less expensive than concrete or pavers. It also needs less care and planning and can be added without professional help. Gravel also has a softer appearance than concrete or pavers. If you later want plants in a graveled area, it is simple to move the gravel aside.
