Best Grapes To Grow In Colorado

Colorado’s intense sunlight and dry air create ideal conditions for grapes that handle temperature swings. If you’re searching for the best grapes to grow in colorado, you need varieties that thrive in short growing seasons and cold winters. This guide covers top picks for wine, table grapes, and juice grapes that actually survive here.

Colorado is a tough place for grapes. But with the right choices, you can harvest sweet, flavorful fruit. The key is matching the grape to your specific microclimate.

The best grapes to grow in colorado fall into two main groups: cold-hardy wine grapes and early-ripening table grapes. Both handle the state’s wild temperature swings and low humidity. Here’s what works.

Top Cold-Hardy Wine Grapes For Colorado

Wine grapes are popular in Colorado’s Western Slope and Front Range. These varieties survive -20°F winters and still produce quality fruit.

Frontenac – A red wine grape that ripens early. It handles cold and makes a deep-colored red wine. Grows well in clay or sandy soils.
Marquette – Another red that’s become a Colorado favorite. It has good disease resistance and produces complex, fruity wines. Ripens mid-season.
La Crescent – A white wine grape with high acidity. Perfect for sweet or dry whites. It needs a trellis system for support.
Brianna – A white grape that ripens very early. It has a floral, fruity flavor and resists powdery mildew. Great for beginners.
St. Croix – A red hybrid that thrives in Colorado’s arid climate. It produces a light, fruity red wine and handles drought well.

Best Table Grapes For Colorado Gardens

If you want grapes for eating fresh, these varieties are reliable. They ripen before the first frost and taste great.

Canadice – A seedless red grape that ripens in late August. It’s sweet and crisp. Grows well on a fence or arbor.
Himrod – A seedless white grape that’s very sweet. It ripens early and is good for snacking or raisins. Needs full sun.
Reliance – A red seedless grape that’s hardy to -20°F. It has a mild flavor and ripens in early September. Good for juice too.
Swenson Red – A large, seeded red grape with a bold flavor. It’s very cold-hardy and makes excellent juice or jelly.
Valiant – A blue-black grape that’s extremely cold-tolerant. It’s often used for juice or jelly. Ripens very early.

Grape Varieties For Colorado’s High Altitudes

Growing grapes above 6,000 feet is challenging. But these varieties handle the thin air and intense UV rays.

Edelweiss – A white grape that does well at high elevations. It has a sweet, floral taste and resists frost damage.
Prairie Star – A white wine grape bred for cold climates. It ripens early and makes a crisp, dry white wine.
King of the North – A red grape that’s one of the hardiest. It produces a dark red juice and handles poor soil.
Beta – An old variety that’s very tough. It’s often used for juice or blending. Grows well in rocky soil.

How To Choose The Right Grape For Your Colorado Site

Not all grapes grow the same everywhere in Colorado. Your elevation, soil, and sun exposure matter. Here’s how to pick.

Consider Your Growing Zone

Colorado ranges from Zone 3 in the mountains to Zone 7 in the lower valleys. Most grapes need Zone 4 or warmer. Check your zone first.

Find your USDA hardiness zone online.
If you’re in Zone 3, stick with Valiant or Beta grapes.
In Zone 4 or 5, try Frontenac or Marquette.
In Zone 6 or 7, you can grow most table grapes.

Match Grape To Your Soil Type

Colorado soil is often alkaline and rocky. Grapes prefer slightly acidic to neutral pH. Test your soil before planting.

Sandy soil – Good drainage. Add compost to retain moisture.
Clay soil – Poor drainage. Plant on mounds or raised beds.
Rocky soil – Add organic matter. Choose deep-rooted varieties like St. Croix.
Loam soil – Ideal. Most grapes thrive here.

Consider Sun Exposure And Wind

Grapes need full sun, at least 6-8 hours daily. In Colorado, south-facing slopes are best. They warm up faster in spring and protect from cold winds.

Wind can damage young vines. Plant near a fence or building for shelter. Use windbreaks if needed.

Planting Grapes In Colorado: Step-By-Step Guide

Planting at the right time and depth is critical. Colorado’s short growing season means you need to get it right.

When To Plant

Plant in early spring, after the last frost. In most of Colorado, that’s mid-April to mid-May. Fall planting is risky because young vines may not survive winter.

How To Plant

Choose a sunny, well-drained spot. Avoid low areas where cold air settles.
Dig a hole twice as wide as the root ball. Make it deep enough to cover roots.
Mix compost or aged manure into the soil. Grapes like organic matter.
Place the vine in the hole. Spread roots out gently.
Fill with soil. Water deeply to settle the soil.
Add a 2-inch layer of mulch around the base. Keep it away from the stem.
Install a trellis or stake for support. Grapes need something to climb.

Spacing And Trellising

Space vines 6-8 feet apart in rows 8-10 feet apart. This allows air flow and sunlight. Use a two-wire trellis system for most varieties.

For table grapes, a single-wire trellis works. For wine grapes, use a vertical shoot positioning system. This trains vines upward for better fruit quality.

Caring For Grape Vines In Colorado’s Climate

Once planted, grapes need regular care. Colorado’s dry air means less disease, but you still need to water and prune.

Watering Guidelines

Grapes need deep, infrequent watering. In Colorado’s arid climate, water once a week during the growing season. Use drip irrigation to avoid wetting leaves.

First year – Water twice a week to establish roots.
Second year – Water once a week.
Mature vines – Water every 10-14 days, depending on rain.
Stop watering 2 weeks before harvest to concentrate sugar.

Fertilizing Tips

Grapes don’t need heavy fertilizer. Too much nitrogen causes leafy growth at the expense of fruit. Use a balanced fertilizer like 10-10-10 in early spring.

Apply compost around the base each year. Avoid fertilizing after mid-summer. This can delay ripening.

Pruning For Colorado Winters

Pruning is essential for grape production. In Colorado, prune in late winter or early spring, before buds swell. Remove dead or weak wood.

For wine grapes, use cane pruning. Leave 2-4 canes per vine.
For table grapes, use spur pruning. Leave 2-3 buds per spur.
Remove all but the strongest shoots in summer.
Thin fruit clusters if the vine is overloaded. This improves size and flavor.

Winter Protection

Even cold-hardy grapes need protection in harsh winters. Mulch the base with straw or wood chips. In extreme cold, cover the lower trunk with soil.

For young vines, wrap the trunk with burlap or use a frost blanket. Remove covers in early spring when temperatures rise.

Common Grape Growing Problems In Colorado

Colorado’s climate is generally good for grapes, but problems can occur. Here’s what to watch for.

Frost Damage

Late spring frosts can kill new growth. Plant on slopes where cold air drains away. Use frost cloth on nights when frost is forecast.

If frost hits, don’t prune damaged growth right away. Wait until new shoots emerge to see what survived.

Powdery Mildew

Dry air usually prevents mildew, but it can happen in humid microclimates. Space vines for air flow. Apply sulfur spray if you see white powder on leaves.

Bird And Pest Issues

Birds love ripe grapes. Cover clusters with netting as they color up. Deer may browse young vines. Use fencing or repellent.

Japanese beetles are rare in Colorado but can appear. Hand-pick them or use insecticidal soap.

Poor Fruit Set

Cold or wet weather during bloom can reduce fruit set. Plant wind-pollinated varieties. Avoid overwatering during flowering.

Harvesting Grapes In Colorado

Timing the harvest is key. Colorado’s short season means you need to watch for ripeness.

When To Harvest

Most grapes ripen from late August to October. Taste test a few berries. They should be sweet and full-flavored. Seeds should be brown, not green.

For wine grapes, measure sugar content with a refractometer. Aim for 20-24 Brix for most wines.

How To Harvest

Use clean, sharp scissors or pruners.
Cut clusters from the vine. Leave a short stem.
Place in shallow containers to avoid crushing.
Refrigerate or process immediately.

Storing Fresh Grapes

Fresh grapes last 1-2 weeks in the fridge. Wash just before eating. For longer storage, freeze whole grapes or make juice.

Using Your Colorado-Grown Grapes

Once you harvest, there are many ways to enjoy your grapes. Here are ideas.

Making Wine At Home

Home winemaking is popular in Colorado. Start with a simple kit or recipe. Use cold-hardy varieties like Frontenac or Marquette for best results.

Crush grapes, ferment with yeast, and age in glass or oak. Colorado’s dry climate is ideal for aging wine.

Making Juice And Jelly

Grape juice is easy. Crush grapes, strain, and pasteurize. For jelly, add pectin and sugar. Valiant and Beta grapes make excellent jelly.

Eating Fresh

Table grapes like Canadice and Himrod are perfect for snacking. Wash and eat straight from the vine. They’re also great in salads or cheese plates.

Frequently Asked Questions

What is the easiest grape to grow in Colorado?

Frontenac is one of the easiest. It’s very cold-hardy, resists disease, and produces reliable crops. It’s a good choice for beginners.

Can I grow grapes in Denver Colorado?

Yes. Denver is in Zone 5b-6a. Choose cold-hardy varieties like Marquette or Canadice. Plant in full sun and protect from wind.

Do grapes need a lot of water in Colorado?

No. Grapes are drought-tolerant once established. Water deeply once a week during the growing season. Overwatering can cause root rot.

How long does it take for grape vines to produce fruit in Colorado?

Most vines produce fruit in the second or third year. First-year growth should be focused on establishing roots and structure.

What is the best time to plant grapes in Colorado?

Early spring, after the last frost. In most areas, that’s mid-April to mid-May. Fall planting is not recommended for most locations.

Final Tips For Growing Grapes In Colorado

Growing grapes in Colorado is rewarding. The state’s sunny days and cool nights produce intense flavors. Start with cold-hardy varieties and give them good care.

Remember to test your soil, water wisely, and prune each year. With patience, you’ll have a bountiful harvest. Enjoy the process and the fruit.

For more information, contact your local Colorado State University Extension office. They offer soil testing and variety recommendations specific to your area.

Happy growing in Colorado’s unique climate. Your grape vines will thank you.