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Plant Guide

Best Plants for Denver, Colorado

📍 Denver, CO 🌡️ USDA Zone 5b/6a 🌱 329+ compatible plants

Gardening in Denver

Denver falls in USDA Hardiness Zone 5b/6a, which means your plants need to survive winters with minimum temperatures in the −10°F to 0°F range. The 329+ plants below are proven performers for your zone — including deer-resistant varieties, pet-friendly options, and pollinator-attracting species.

Top Plant Picks for Denver

Prairie Dropseed
Prairie Dropseed
Sporobolus heterolepis
Delicate, airy golden seed heads dance above fine-textured foliage, creating stunning fall interest from summer to autumn. This low-maintenance, drought-tolerant grass thrives in USDA zones 4-9 and attracts pollinators while resisting deer.
Zone 3–9🦌 Deer-Resistant🐾 Pet-Friendly†🐝 Pollinator
Delphinium
Delphinium
Delphinium elatum
Tall spikes of vibrant blue blossoms light up summer gardens with stunning color and elegance. This deer-resistant beauty thrives in USDA zones 3-7 and attracts pollinators while requiring moderate care.
Zone 3–7🐝 Pollinator
Blue Fescue
Blue Fescue
Festuca glauca
Silvery-blue, fine-textured foliage adds striking color and texture year-round, especially vibrant in spring and summer. This low-maintenance, drought-tolerant grass thrives in USDA zones 4-8 and resists deer browsing.
Zone 4–8🦌 Deer-Resistant🐾 Pet-Friendly†
Star Magnolia
Star Magnolia
Magnolia stellata
Fragrant white star-shaped blooms light up early spring, creating a stunning floral display. This low-maintenance shrub thrives in USDA zones 4-9 and attracts pollinators.
Zone 4–9🦌 Deer-Resistant🐾 Pet-Friendly†🐝 Pollinator
Linden Tree
Linden Tree
Tilia spp.
Fragrant yellow and white blooms from June to September make this tree a stunning summer highlight. Attracting pollinators and thriving in zones 4-9, it’s low maintenance and dog- and cat-friendly.
Zone 4–9🐾 Pet-Friendly†🐝 Pollinator
Virginia Sweetspire
Virginia Sweetspire
Itea virginica Henry's Garnet
Fragrant, deep red blooms light up late spring through summer, creating stunning color and texture in any garden. This low-maintenance shrub thrives in USDA zones 5-9 and attracts pollinators while resisting deer.
Zone 5–9🦌 Deer-Resistant🐾 Pet-Friendly†🐝 Pollinator
Lavender
Lavender
Lavandula angustifolia
Fragrant purple blooms light up summer gardens from June to August, creating a stunning and soothing display. This deer-resistant herb thrives in full sun (USDA zones 5-9) and attracts numerous pollinators.
Zone 5–9🦌 Deer-Resistant🐝 Pollinator
Polystichum Christmas Fern
Polystichum Christmas Fern
Polystichum acrostichoides
Lush, evergreen fronds add year-round texture and vibrant green color to shaded garden spots, brightening fall and winter seasons. This low-maintenance, deer-resistant fern thrives in zones 4-9 and attracts pollinators while staying pet-friendly.
Zone 4–9🐾 Pet-Friendly†🐝 Pollinator
Columbine
Columbine
Aquilegia canadensis
Delicate red and yellow blooms brighten spring and early summer with a whimsical, nodding shape. This low-maintenance perennial thrives in USDA zones 3-9 and attracts hummingbirds while resisting deer.
Zone 3–9🦌 Deer-Resistant🐝 Pollinator
Blanket Flower
Blanket Flower
Gaillardia aristata
Vibrant red and yellow blooms light up gardens from early summer to fall, creating a stunning, long-lasting display. This drought-tolerant, deer-resistant beauty thrives in USDA zones 3-10 and attracts pollinators with ease.
Zone 3–10🦌 Deer-Resistant🐾 Pet-Friendly†🐝 Pollinator
Daffodil
Daffodil
Narcissus spp.
Bright yellow blooms herald early spring with cheerful, trumpet-shaped flowers that brighten any garden. Deer resistant and hardy in USDA zones 3-9, they require minimal care while attracting early pollinators.
Zone 3–9🦌 Deer-Resistant🐝 Pollinator
Hollyhock
Hollyhock
Alcea rosea
Towering spikes burst with vibrant pink, red, or white blooms from mid-summer to early fall, adding classic cottage charm. This hardy biennial thrives in USDA zones 3-9 and attracts pollinators while tolerating heat and drought.
Zone 3–8🦌 Deer-Resistant🐝 Pollinator

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Other Cities in Zone 5b/6a

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Browse All 329+ Plants for Zone 5b/6a

The 12 picks above are a sample. Use the full directory to filter by sun, water, deer resistance, and more.

View All Zone 6 Plants →

† "Pet-friendly" means not listed as toxic by ASPCA for dogs and/or cats. Always supervise pets around plants. ASPCA Animal Poison Control: (888) 426-4435.