4 English Cottage Garden Ideas for Westminster, CO | Zone 5b Borders by Standley Lake
Native plants from the Western shortgrass prairie (Zone 5b) — Humid subtropical climate
Why Cottage/English Gardens in Westminster?
A cottage garden is a crowded, generous thing, and Westminster has plenty of streets that can carry one. Around Historic Westminster, below the old red sandstone Westminster University building on its hill off Federal Boulevard, the houses are modest and close to the sidewalk, so a fence line of roses and a gate you walk through reads well from the street. Bradburn Village was laid out with porches facing the street and garages tucked onto rear alleys, which leaves the whole front strip free for flowers. Out by Standley Lake and in Legacy Ridge the lots are bigger and the houses newer, and there the cottage idea works best in the back, where a bench can face the foothills.
What an English catalogue calls a cottage plant often fails at this altitude. The city sits around 5,300 feet in USDA Zone 5b. Expect January nights of -15 to -10°F, bright sun that bleaches soft foliage, chinook gusts that pull moisture out of canes, and heavy May snowfalls that land on fresh leaves. Denver's official normal is 14.48 inches of precipitation a year. So swap with care: Rosa 'Quadra' and Rosa 'Henry Kelsey' climb an arbor in place of 'Albertine', Aquilegia caerulea (the Colorado columbine) and Centranthus ruber stand in for English cottage self-seeders, and Salvia 'Ultra Violet' and Scabiosa columbaria 'Butterfly Blue' give the soft purple haze that thirstier perennials give in Devon. Foxglove is short-lived here and hollyhocks get rust, so plant a few as extras rather than as the frame.
Under most Westminster lawns lies heavy, lime-rich clay, often pH 7.5 to 8.2, packed down when the subdivision was graded. Good news for bearded iris, oriental poppy, Dianthus and mock orange, which all like sweet soil. Bad news for azaleas and blue mophead hydrangeas, which turn yellow, so leave them in the catalogue. Before planting, fork in a generous layer of plant-based compost (manure-based bags can carry salts), and lift the beds for roses and pinks a few inches above the lawn, because snowmelt in March pools on clay and rots crowns faster than the cold kills them.
Water is the other limit. On April 15, 2026 Westminster declared a Drought Watch. Nothing is mandatory yet, but the city asks households to run lawn sprinklers on at most three days a week, between 6 p.m. and 10 a.m., and to follow its 1-2-3-2-1 pattern: one day a week in spring, two in June, three in July and August, then fewer again in fall. A cottage plan copes with that well, because flower beds on drip use far less than bluegrass. Westminster water customers can also use the city's Resource Central partnership: Garden In A Box kits, Slow the Flow sprinkler checks, and the Lawn Replacement Program for turning turf into borders.
4 Cottage/English Design Ideas for Westminster
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The Federal Hill Rose Fence
$15–32/sqftOn a small brick bungalow a few blocks from the old Westminster University building, a split-rail cedar fence carries Quadra roses trained along the top rail instead of over an arch. Bearded iris, oriental poppy and pinks crowd the strip between fence and sidewalk, and a gravel path leads to a painted front door. The strip faces south and is fully open, so the roses flower heavily and the iris rhizomes bake dry in July, which is what they want.
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The Bradburn Alley-Loaded Front
$17–35/sqftBecause Bradburn houses park in back, the whole front between porch and sidewalk can be one flower bed cut by a straight brick walk. Tall Jacob Cline bee balm and Jeana phlox fill the back against the porch skirt, Colorado columbine and Becky daisies fill the middle, and a clipped Green Mound currant hedge holds the sidewalk edge. Where a Bradburn front faces north, these plants take the part shade and stay fresh through August.
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The Legacy Ridge Clematis Corner
$14–28/sqftA two-story Legacy Ridge house gets a deep curved bed where the front walk meets the driveway, built around a cedar obelisk wrapped in purple clematis and a Blizzard mock orange that scents the entry in June. Lower down sit mounds of catmint, Royal Candles veronica and Butterfly Blue pincushion flower, repeated in threes so the bed reads as planned from the street. The corner gets morning sun and afternoon shade from the garage, which keeps the clematis roots cool.
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The Standley Lake Foothills Bench
$20–42/sqftAt the back of a lot near Standley Lake, a stone-dust path loops past a long border to a cedar bench that faces west to the foothills. The border mixes tough shrub roses, Ultra Violet salvia and native wild rose with Pawnee Buttes sand cherry spilling over the path edge, and a thornless cockspur hawthorn at one end gives the bench afternoon shade. The west exposure is hot and windy, so every plant in this border is a Front Range survivor.
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Featured Trees & Shrubs for Cottage/English Gardens
Browse all 159 plants for Westminster
Golden Currant
Ribes aureum
grows to 6 feet, yellow blooms in spring. Attracts hummingbirds.
Featured Grasses & Groundcovers for Cottage/English Gardens
Blue Grama Grass
Bouteloua gracilis
low-growing ground cover, purple blooms in summer. Yellow fall color.
Buffalo Grass
Buchloe dactyloides
low-growing ground cover, blooms in summer. Yellow fall color.
Little Bluestem
Schizachyrium scoparium
grows to 3 feet, blooms in summer. Red,burgundy fall color.
Sand Dropseed
Sporobolus cryptandrus
low-growing ground cover, blooms in summer. Orange fall color.
Featured Flowers & Perennials for Cottage/English Gardens
Hood's Phlox
Phlox hoodii
low-growing ground cover, white blooms in spring. Attracts butterflies.
Purple Poppy Mallow
Callirhoe involucrata
low-growing ground cover, purple blooms in summer. Attracts butterflies.
Soapweed Yucca
Yucca glauca
low-growing ground cover, white blooms in spring. Pollinator-friendly.
White Sage
Artemisia ludoviciana
low-growing ground cover, white blooms in summer. Fragrant.
Zone and sun checks come from our database — confirm with your local nursery before you buy.
Bloom Calendar for Westminster
spring
Hood's Phlox, Soapweed Yucca, Golden Currantsummer
Purple Poppy Mallow, White Sage, Blue Grama Grassfall
Limited bloomswinter
Limited bloomsDesign Tips for Westminster (Zone 5b)
- Train Rosa 'Quadra' along a fence rail rather than over a high arch: horizontal canes flower all along their length, and a low fence shrugs off the wet May snow that flattens tall arbors
- Fork in plant-based compost, not manure, before planting: Westminster clay already runs pH 7.5 to 8.2 and salty manure makes iron chlorosis worse
- Lift beds for iris, Dianthus and roses a few inches above the lawn, since March snowmelt pools on graded clay and rots crowns
- Group the drip zones by thirst so the Agastache and Pawnee Buttes sand cherry get far less than the phlox and bee balm, and run them in the 6 p.m. to 10 a.m. window the Drought Watch asks for
- Use Aquilegia caerulea and Centranthus ruber as the self-seeders: they give the loose cottage look without the rust that hollyhocks get on the Front Range
- Plant north-facing Bradburn fronts with part-shade cottage plants such as Phlox 'Jeana', Monarda 'Jacob Cline' and columbine instead of sun-loving roses
- Pull field bindweed in May while it is small; once it twines through a dense cottage border it is nearly impossible to remove
Where to Source Plants in Westminster
Skip the big-box stores. These independent Westminster nurseries specialize in the plants that make cottage/english gardens thrive in Zone 5b.
O'Toole's Garden Center (Westminster store)
Wadsworth Parkway at the Westminster and Broomfield line
Family-owned garden center with a large tree and evergreen yard, plus perennials, grasses, shrubs, vines, soils and fertilizers
Front Range Gardens
Broomfield, Wadsworth Boulevard, just north of Westminster
Local garden center with rose bushes, perennials, evergreens, grasses, shrubs, trees and a rare plants selection
Echter's Nursery & Garden Center
Arvada, Garrison Street, a short drive southwest
Arvada garden center growing with Colorado since 1959, with roses, perennials, shrubs and trees for the Front Range
Harlequin's Gardens
North Boulder, about 25 minutes northwest
Hardy roses, native plants and xeriscape plants grown for Front Range conditions, the place to go for own-root roses
Cottage/English Landscaping Costs in Westminster
| Project Scope | Estimated Cost |
|---|---|
| Front-yard cottage bed, turf stripped, compost and drip (400–700 sqft) | $8,000 – $24,000 |
| Cedar rail or picket fence with rose training wires or arbor | $3,000 – $9,000 |
| Crusher-fines path with steel edging (150–250 sqft) | $1,500 – $4,000 |
| Running-bond clay brick walk on road base (100–200 sqft) | $3,500 – $9,000 |
| Bench pad, boulders and shade tree for a back border | $2,500 – $7,000 |
| Backyard cottage border with path, bench and planting | $25,000 – $65,000 |
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Estimates based on Westminster, CO-area contractor rates as of 2026. Actual costs vary by site conditions, materials, and contractor.
Westminster Climate & Growing Zone
USDA Zone 5b
Hardiness zone for Westminster
Western shortgrass prairie
Native ecoregionFrequently Asked Questions
What does a cottage garden cost in Westminster, CO?
Crews around the north Denver suburbs commonly charge about $60–90 per hour per worker, so labor drives the bill. A front-yard cottage bed of 400–700 sqft, with turf stripped, compost worked in, drip laid and plants set, typically comes to $8,000–24,000. A cedar rail or picket fence with training wires or an arbor runs $3,000–9,000, and a brick or crusher-fines walk $10–45 per square foot depending on material. Backyard borders with a path, bench pad and shade tree commonly land at $25,000–65,000. Planting Salvia 'Ultra Violet' and Aquilegia caerulea yourself from quart pots cuts the plant cost sharply.
Which climbing roses can handle Westminster winters?
Choose roses grown on their own roots from the Canadian Explorer and Parkland breeding lines. Rosa 'Quadra' and Rosa 'Henry Kelsey' both climb to eight feet or more and survive below -20°F, so -15°F in a hard Zone 5b January is no threat. For shrubs, Rosa 'Cuthbert Grant', Rosa 'Winnipeg Parks' and the native Rosa woodsii take the wind. Grafted climbers sold in spring often die back to the graft by the second winter. Water the root zone once a month in snowless winters, and prune only after the threat of hard frost passes in late April.
How much upkeep does a cottage border need here?
Less than bluegrass, if the plant list is right. Cut back catmint, Salvia 'Ultra Violet' and Veronica 'Royal Candles' after the first flush for a second bloom, deadhead phlox and bee balm in August, and do one big cleanup in late March. Leaving seed heads up over winter feeds finches and holds snow on the crowns. Add an inch of mulch each spring, flush the drip filter, and pull bindweed early, because it is the weed that takes over Westminster beds.
When should I plant a cottage garden in Westminster?
Spring planting runs from late April to early June and fall planting from late August into September. Denver International Airport's median last spring freeze falls around May 5 and its median first fall freeze around October 9, so wait until mid-May for anything tender. Shrubs and roses root best in September, while the ground is warm and the sun is gentler. The city also asks residents to hand water until May, before sprinkler systems are switched on, so new spring plants need a hose.
Are there watering restrictions in Westminster right now?
Westminster has been under a Drought Watch since April 15, 2026, which is voluntary. The city asks for lawn watering on three days a week at most, between 6 p.m. and 10 a.m., following its 1-2-3-2-1 seasonal pattern. If supply worsens, the Stage 1 mandatory rules would cut irrigation to two assigned days a week between May 1 and September 30, again between 6 p.m. and 10 a.m. Drip-fed borders use the least water, so convert turf to beds rather than adding sprinkler heads.
Will my HOA or the city need to approve a cottage garden?
If you live in Legacy Ridge, Bradburn Village or another covenant community, send the architectural committee a sketch, plant list and fence detail before you start. State law in Colorado stops an HOA from banning drought-tolerant landscaping, though it can still set reasonable standards. Fences, arbors and anything with footings may need a City of Westminster permit, and the city can tell you the required frost depth for posts, so call before you dig.
Is there a public garden near Westminster for cottage plant ideas?
Denver Botanic Gardens at York Street is about 25 minutes away and shows hundreds of Front Range-proven perennials, including many Plant Select varieties such as Agastache rupestris and Salvia 'Ultra Violet'. Seeing them fully grown in August helps you choose plants that hold up in July heat, rather than ones that only look good in May.
