Best Plants For Castle Rock, CO

A variety of plants are suitable for Castle Rock's climate. According to our data, the growing zone for the area is 5b, with average annual lows of -15 to -10 degrees Fahrenheit. Scroll down for a full list of the best plants for Castle Rock, CO based on our analysis of the region's climate.

If growing food is your aim, vegetables hardy to Castle Rock include beets, broccoli and brussels sprouts, while fruits like apples, apricots and blackberries will flourish.

For flower beds, go with choices like asters, black-eyed susans (rudbeckia) and bleeding heart (dicentra spectabilis) for the best results.

Seed Starting Trays

Perfect for starting seeds indoors before transplanting to your garden.

Raised Garden Planter

Elevated planter for easy access and better drainage.

Trees for Castle Rock

American Beech (Fagus grandifolia)

American Elm (Ulmus Americana)

American Sycamore (Platanus occidentalis)

Black Walnut (Juglans nigra)

Blue Spruce (Picea pungens)

Cottonwood (Populus deltoides)

Douglas Fir (Pseudotsuga menziesii)

Eastern Hemlock (Tsuga canadensis)

Eastern Redbud (Cercis canadensis)

Honey Locust (Gleditsia triacanthos)

Northern Red Oak (Quercus rubra)

Norway Spruce (Picea abies)

Red Maple (Acer rubrum)

Red Oak (Quercus rubra)

Silver Maple (Acer saccharinum)

Sugar Maple (Acer saccharum)

White Ash (Fraxinus americana)

White Birch (Betula papyrifera)

White Oak (Quercus alba)

White Pine (Pinus strobus)

Fruits for Castle Rock

Apples

Apricots

Blackberries

Blueberries

Cherries

Concord grapes

Currants

Elderberries

Figs

Gooseberries

Hardy kiwi

Honeyberries

Mulberries.

Peaches

Pears

Plums

Quince

Raspberries

Rhubarb

Strawberries

Worm Composting Kit

Complete kit for starting your own worm composting system.

Hoeing Ain't Easy Garden Sign

Fun and decorative garden sign to add personality to your space.

Flowers for Castle Rock

Asters

Black-Eyed Susans (Rudbeckia)

Bleeding Heart (Dicentra Spectabilis)

Coneflowers (Echinacea)

Daylilies (Hemerocallis)

Forsythia

Hardy Geraniums

Hostas

Hydrangeas

Iris

Lilacs (Syringa)

Marigolds (Tagetes)

Peonies (Paeonia)

Petunias

Rhododendrons

Roses (Rosa)

Shasta Daisy (Leucanthemum superbum)

Sunflowers (Helianthus)

Tulips (Tulipa)

Zinnias

Vegetables for Castle Rock

Beets

Broccoli

Brussels Sprouts

Cabbage

Carrots

Cauliflower

Cucumbers

Kale

Leeks

Lettuce

Onions

Peas

Pumpkins

Radishes

Spinach

Squash

Swiss Chard

Tomatoes

Turnips

Zucchini

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Frequently Asked Questions

Have questions about plants for your area? Check out our FAQ below for quick answers to common questions about what plants grow best in the Castle Rock, CO climate.

Some of the best vegetables for Castle Rock, CO include beets, broccoli and brussels sprouts. Other recommended vegetables include Cabbage, Carrots and Cauliflower based on Castle Rock's USDA hardiness zone.

Map of CO Hardiness Zones

Choose plants with your zone in mind

Choosing plants based on the growing zone for Castle Rock ensures that your plants will be able to survive the lowest annual temperatures in your area of Colorado.

Raised Garden Planter

Elevated planter for easy access and better drainage.

Brass Decorative Faucet Handle

Elegant brass handle to enhance your garden faucet.

Stainless Steel Garden Tool Set

Complete garden tool set with heavy-duty stainless steel tools for all your gardening needs.

Rustic Iron Garden Trellis

Sturdy trellis for supporting climbing plants and vines.

Seed Starting Trays

Perfect for starting seeds indoors before transplanting to your garden.

Best Time to Plant in Castle Rock

Check the growing calendar for Castle Rock at the Old Farmer's Almanac to see the best planting times for the region.

Need Gardening Gear?

The Plant Guide Online has selected some of our favorite products to help you with your next growing project. From seed starting trays and fertilizers to decor and lifestyle items, we think you'll love what we've selected.

Small Greenhouse Kit

Compact greenhouse perfect for small spaces.

Metal Arbor Trellis

Decorative arbor trellis for climbing plants and garden entrance.

Hydroponic Garden Grow Kit

Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.

Rustic Iron Garden Trellis

Sturdy trellis for supporting climbing plants and vines.

Reusable Grow Bags

Breathable fabric grow bags that promote healthy root growth for your vegetables and fruits.

Castle Rock's Temperature

USDA Growing Zone: 5b

Zip Codes: 80104, 80108, 80109

Longitude: -104.8535

Latitude: 39.3763

Lowest Avg Temperatures (F): -15 to -10

The USDA growing zone is 5b in Castle Rock, CO. This is a measure of the lowest temperature that a plant can survive, helping to decide what plants would be suitable for the region's climate. According to our records, the average annual extreme minimum temperature in Castle Rock is -15 to -10 degrees Fahrenheit. If you would like to learn more, visit our page on the growing zone for Castle Rock, CO.

Map of Castle Rock

Large Greenhouse Kit

Spacious greenhouse for extending your growing season.

Wooden Chicken Coop

Spacious and secure home for your backyard chickens.

Raised Garden Planter

Elevated planter for easy access and better drainage.

Metal Arbor Trellis

Decorative arbor trellis for climbing plants and garden entrance.

Small Greenhouse Kit

Compact greenhouse perfect for small spaces.

All Towns In CO

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Tools You'll Love

Hydroponic Garden Grow Kit

Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.

Brass Watering Can

Elegant brass watering can with classic design and durability.

Steel Hori Hori Weeding Knife

Versatile Japanese-style gardening knife for weeding and planting.

Fiskars Garden Harvest Basket

Sturdy basket for collecting and carrying your garden harvest.

Brass Decorative Faucet Handle

Elegant brass handle to enhance your garden faucet.

Plants For Other States

Looking for the best plants in a different area of the United States? Click on a button below to find plants that are ideal for that state's temperatures.

Wooden Chicken Coop

Spacious and secure home for your backyard chickens.

Rustic Iron Garden Trellis

Sturdy trellis for supporting climbing plants and vines.

Raised Garden Bed Kit

Easy-to-assemble raised garden bed for better soil control and drainage.

Seed Starting Trays

Perfect for starting seeds indoors before transplanting to your garden.

Worm Composting Kit

Complete kit for starting your own worm composting system.

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