How to xeriscape a yard with decorative rock
Xeriscaping isn’t a gravel parking lot with a shrub in it. Done properly it’s a planted yard that happens not to need watering — and in a climate that swings from drought restrictions to a metre of snow, it’s the lowest-maintenance front yard you can build here.
The short version
- Decorative rock goes 2″ deep, not more. Deeper wastes material and buries plant crowns.
- One yard covers 162 sq ft at 2″.
- Fabric under rock, never under mulch in planted beds — it stops the plants you’re keeping.
- Pick rock by size, not just colour: 40mm reads as a field, 25mm as a surface, 2–4″ as a feature.
- Edging is not optional. Rock without restraint ends up in the lawn and the gutter.
Materials
Tools: marking paint or a garden hose · spade · landscape rake · wheelbarrow · knife for fabric
Depth & coverage
A 400 sq ft front bed at 2″ takes about 2.5 yards.
Steps
1 · Decide what stays
Mark the trees and shrubs you’re keeping. A xeriscape with three or four established plants in it looks designed; one with none looks abandoned.
2 · Lay out the shape with a hose
Curves read better than straight lines in a front yard, and a garden hose on the grass shows you the shape before you commit. Live with it a day.
3 · Strip the sod and 2–3″ of soil
You need the rock to finish flush with the lawn, not proud of it. Rock sitting above grade migrates onto the grass and into the mower.
4 · Set the boulders first
Anchor stones go in before anything else, while you can still move them. Bury each by about a third of its height — a boulder sitting on the surface looks dropped; one buried into the grade looks like it grew there. Group them in odd numbers.
5 · Plant before you rock
Everything that’s going in the ground goes in now. Planting through finished rock and fabric is miserable work and it never looks the same afterwards.
6 · Lay and pin the fabric
Overlap seams by 12″ and staple every couple of feet, more at the edges. Cut a generous cross for each plant and fold the flaps back — don’t cut a tight hole, the plant will grow into it and lift the fabric.
7 · Install the edging
Every boundary between rock and lawn, bed or path. This is what keeps the job looking sharp in year three.
8 · Spread the rock 2″ deep
Barrow it in and rake it level. Resist going deeper — 2″ covers the fabric completely, and anything past 3″ is money buried where nobody sees it. Keep rock back off plant stems.
9 · Rinse it down
A hose over the finished rock washes off dust and brings the colour up. Decorative rock always looks better wet, and the first rinse is when you find out what you actually bought.
Xeriscaping in the Edmonton area
This climate genuinely suits it. Edmonton is dry through summer, water restrictions are a normal part of the season, and the plants that thrive here unwatered are the same ones that look good in rock — juniper, potentilla, sedum, native grasses, yarrow.
- Rock and snow. Decorative rock disappears under snow for months, which is worth thinking about at design stage: the shapes that carry the yard in January are the boulders, the edging lines and whatever stays upright. A flat field of rock is a flat field of white for half the year.
- Shovelling near rock. Keep decorative rock back from the edges of walks and drives, or you’ll spend each spring picking it out of the lawn. A hard edge and a few inches of clearance solves it.
- Freeze-thaw moves things. Boulders set on soft ground will shift over a few winters. Set them on compacted subgrade or a few inches of road crush and they stay where you put them.
- The fabric myth, straight. Fabric under rock stops weeds coming up. It does nothing about seeds landing on top and germinating in the dust that accumulates between stones — that happens in every rock bed eventually. Fabric buys years, not permanence.
Common mistakes
- Rock too deep. 4″ where 2″ would do is double the material for no visible difference.
- No edging. The single biggest difference between a xeriscape that looks good at five years and one that looks like it’s dissolving.
- Fabric under mulch in a planted bed. Mulch is meant to break down into the soil. Fabric under it stops that and starves the bed.
- All one stone size. A yard finished entirely in 25mm rock reads flat. Scale contrast — boulders, field rock, a finer path — is what makes it look designed.
- Planting after rocking. Twice the work, half the result.
- Rock right up against siding. Leave a clear gap; rock against the house traps moisture and blocks the drainage plane.
- Choosing colour from a phone screen. Come and look at it dry and wet — the difference is dramatic.
What it costs
Priced by material and volume — calculate your yardage before ordering.Decorative rock is priced per yard and varies quite a bit by stone, so the choice of rock moves the total more than the size of the bed does. The material calculator will give you the volume; call the yard and we’ll price the options against each other.
FAQ
Landscaping designed to need little or no supplemental water — the right plants, good soil preparation and a mulch or rock surface that holds moisture in the ground. It doesn't mean removing the plants.
2″ over fabric. One yard covers 162 sq ft at that depth.
40mm (1.5″) reads well over larger open areas and stays put on slopes. 25mm (3/4″) gives a finer, more even surface. 2–4″ creekstone is for features and dry creek beds, not for covering ground.
Yes, under rock. Not under mulch in a planted bed — mulch needs to break down into the soil.
Not from below, if the fabric is laid and pinned properly. Over time seeds land on top and germinate in accumulated dust between the stones — that's normal and it's a quick hand-pull, not a failure.
Yes. Rock is unaffected by freeze-thaw, and the planting palette that suits dry summers here is generally hardy. Design for what the yard looks like under snow as well as in July.
Strip the sod first. Rock laid over grass sinks into it and the grass finds its way through the edges.
Order the materials
Come and see the rock dry and wet before you commit a whole front yard to it — colour shifts more than you’d expect. Delivered anywhere in Edmonton metro inside 24 hours.
Not doing it yourself?
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