Wyoming’s cold climate and short summers limit grape varieties to cold-hardy hybrids like Marquette. If you’re searching for the Best Grapes To Grow In Wyoming, you need varieties that can survive -30°F winters and ripen in just 100-120 frost-free days. The state’s high elevation and intense sunlight actually help grapes develop rich flavors, but only if you pick the right types.
Growing grapes in Wyoming is not like growing them in California. You have to work with nature, not against it. The key is choosing cold-hardy hybrids bred specifically for harsh northern climates. These grapes can handle the cold, resist diseases, and still produce fruit that makes excellent wine or jelly.
This guide covers the top grape varieties for Wyoming, how to plant them, and tips for success. You’ll learn which grapes survive the winter, produce the best fruit, and need the least fuss. Let’s get started.
Why Wyoming Is Tough On Grapes
Wyoming sits in USDA hardiness zones 3 through 5. Most of the state is zone 4, where winter temperatures drop to -30°F. That kills standard wine grapes like Cabernet Sauvignon or Chardonnay. You need grapes that can handle extreme cold.
The growing season is short too. In many parts of Wyoming, you only get 100 to 120 days without frost. Grapes need time to ripen after flowering. If they don’t ripen before the first fall frost, the fruit stays sour and the vines may not harden off for winter.
Wind is another problem. Wyoming is famous for its constant wind, which can dry out vines and break young shoots. You’ll need to plant in sheltered spots or use windbreaks.
Despite these challenges, Wyoming has advantages. The high altitude means more intense sunlight, which helps grapes develop sugar and flavor. The dry climate reduces fungal diseases that plague grapes in humid areas. With the right varieties, you can grow excellent grapes.
Best Grapes To Grow In Wyoming
Here are the top grape varieties that thrive in Wyoming’s conditions. These are all cold-hardy hybrids, meaning they were bred from native American grapes and European varieties. They combine cold tolerance with good flavor.
Marquette
Marquette is the most popular cold-hardy wine grape for northern climates. It was developed by the University of Minnesota and can survive -35°F. It ripens early, usually in late September, which fits Wyoming’s short season.
The grapes are small and dark blue. They make a medium-bodied red wine with notes of cherry and black pepper. Marquette is also good for juice and jelly. It’s disease-resistant and doesn’t need much spraying.
Plant Marquette in full sun with good air flow. Space vines 6 to 8 feet apart. Prune hard in winter to keep the vine productive.
Frontenac
Frontenac is another University of Minnesota hybrid. It’s even hardier than Marquette, surviving -40°F. The grapes ripen early to mid-September. They are very tart, so they’re mainly used for wine, not eating fresh.
Frontenac makes a bold red wine with high acidity. It’s often blended with other grapes to soften the tartness. The vines are vigorous and productive. You’ll get a lot of fruit, but you need to manage the canopy to prevent disease.
This grape is excellent for beginners because it’s tough and forgiving. Even if you make mistakes, Frontenac usually survives and produces.
La Crescent
La Crescent is a white wine grape that handles cold down to -35°F. It ripens in mid-September. The grapes are golden and sweet, with a honeyed flavor. They make a semi-sweet white wine that’s popular at farmers markets.
La Crescent is prone to powdery mildew in humid conditions, but Wyoming’s dry climate helps. Still, you should plant it where air circulates well. It’s a good choice if you want white wine or table grapes.
The vines are moderately vigorous. Prune them to keep the canopy open. Harvest when the grapes taste sweet, not just when they look ripe.
St. Croix
St. Croix is an older hybrid from the 1970s. It survives -30°F and ripens in late September. The grapes are dark red and make a light red wine or rosé. They are also good for eating fresh if you like tart grapes.
St. Croix is disease-resistant and easy to grow. It’s a good choice for beginners who want a red grape that’s less acidic than Frontenac. The vines are compact, so you can plant them closer together.
One downside: St. Croix can be sensitive to spring frosts because it buds out early. Plant it on a north-facing slope to delay budding.
Valiant
Valiant is the hardiest grape on this list. It survives -50°F and ripens in early September. The grapes are small, dark purple, and very sweet. They are perfect for juice, jelly, and eating fresh. Valiant is not a wine grape, but it’s great for beginners.
Valiant was developed in South Dakota for the coldest parts of the Great Plains. It grows as a bush, not a vine, so you don’t need a trellis. It’s almost impossible to kill. If you want a low-maintenance grape, this is it.
Plant Valiant in any sunny spot. It doesn’t need much pruning. Just cut out dead wood in spring.
Brianna
Brianna is a white wine grape that survives -35°F. It ripens in late August to early September, making it one of the earliest grapes. The grapes are golden and have a fruity, floral flavor. They make a sweet white wine that tastes like pineapple.
Brianna is disease-resistant and easy to grow. It’s a good choice for northern Wyoming where the season is shortest. The vines are moderately vigorous. Prune them to 40 to 60 buds per vine for best fruit quality.
This grape is popular with home winemakers because it produces a consistent crop every year.
How To Plant Grapes In Wyoming
Planting grapes in Wyoming requires some extra steps to protect them from cold and wind. Follow these steps for the best results.
Choose The Right Site
Grapes need full sun, at least 6 to 8 hours per day. Choose a south-facing slope if possible. This gives the most sun and helps cold air drain away. Avoid low spots where frost settles.
Wind protection is critical. Plant near a building, fence, or windbreak of trees. If you don’t have natural shelter, install a windbreak fabric. Wind dries out vines and can break young shoots in spring.
Soil should be well-drained. Grapes don’t like wet feet. Sandy loam is ideal. If you have clay soil, plant on a mound or raised bed to improve drainage. Test the soil pH; grapes prefer 5.5 to 6.5.
Prepare The Soil
Remove all grass and weeds from the planting area. Grass competes with young vines for water and nutrients. Till the soil 12 inches deep. Mix in compost or aged manure to improve fertility.
If your soil is heavy clay, add sand or perlite to improve drainage. Grapes are drought-tolerant once established, but they need good drainage to prevent root rot.
Plant The Vines
Plant in spring after the last frost. In Wyoming, that’s usually mid-May to early June. Dig a hole deep enough to cover the roots. Spread the roots out and backfill with soil. Water well.
Space vines 6 to 8 feet apart for most varieties. Valiant can be planted closer, 4 to 5 feet apart. Rows should be 8 to 10 feet apart. This gives room for trellises and air flow.
Install a trellis at planting time. A two-wire trellis works well. The first wire at 3 feet high, the second at 5 feet. Train the main trunk up to the top wire.
Water And Mulch
Water young vines regularly for the first two years. Give them 1 to 2 inches of water per week. Once established, grapes are drought-tolerant. Water deeply but infrequently to encourage deep roots.
Mulch around the base with straw or wood chips. This keeps the soil cool, retains moisture, and suppresses weeds. Keep mulch 6 inches away from the trunk to prevent rot.
Winter Protection For Grapes
Even cold-hardy grapes need some winter protection in Wyoming. The biggest danger is not the cold itself, but temperature swings. A warm spell in January can cause vines to break dormancy, then a cold snap kills them.
Mulch The Base
After the ground freezes, add a thick layer of mulch around the base of the vine. Use straw, leaves, or wood chips. This insulates the roots from extreme cold and temperature fluctuations.
For extra protection, mound soil 6 to 8 inches high around the base. This protects the graft union, which is the most vulnerable part. Remove the soil mound in spring.
Use Row Covers
For young vines or tender varieties, use row covers. These are fabric covers that go over the vines. They trap heat and protect from wind. Remove them in spring before bud break.
Some growers in Wyoming bury their vines for winter. This means laying the vine on the ground and covering it with soil. It’s a lot of work but very effective. Only do this for valuable vines.
Prune In Late Winter
Prune grapes in late winter, usually March. Wait until the worst cold is over. Pruning too early can stimulate growth that gets killed by frost. Prune to remove dead wood and shape the vine.
For most varieties, leave 40 to 60 buds per vine. This balances fruit production with vine health. Remove any suckers from the base.
Common Problems And Solutions
Even with hardy grapes, you may face issues. Here are the most common problems in Wyoming and how to fix them.
Spring Frost Damage
Late spring frosts can kill new growth and flowers. If a frost is forecast, cover vines with row covers or old sheets. Remove them in the morning. Planting on a slope helps cold air drain away.
If frost damages the flowers, you may lose the crop for that year. But the vine will recover. Prune off dead growth and fertilize lightly.
Wind Damage
Wind breaks shoots and dries out leaves. Use windbreaks or plant in sheltered spots. Tie young shoots to the trellis to prevent breakage. In extreme wind, use a temporary fabric barrier.
Wind can also cause soil erosion around roots. Mulch heavily to hold soil in place.
Disease
Wyoming’s dry climate reduces fungal diseases, but they can still occur. Powdery mildew is the most common. It looks like white powder on leaves. Prevent it by planting in full sun and pruning for air flow.
If you see mildew, spray with a fungicide or a baking soda solution (1 teaspoon per quart of water). Remove infected leaves.
Birds And Wildlife
Birds love ripe grapes. Net your vines when fruit starts to color. Use bird netting or scare devices like reflective tape. Deer and rabbits may also eat vines. Fence the area or use repellents.
Harvesting And Using Grapes
Harvest grapes when they are fully ripe. Taste them to check. For wine grapes, you want high sugar and balanced acid. For table grapes, they should be sweet and firm.
Pick in the morning when grapes are cool. Use scissors or pruners to cut clusters. Handle gently to avoid bruising. Store in a cool place and process within a few days.
You can use Wyoming grapes for wine, juice, jelly, or eating fresh. Valiant and Brianna are best for juice and jelly. Marquette and Frontenac are for wine. La Crescent makes excellent white wine.
If you make wine, you’ll need basic equipment: a fermenter, airlock, and bottles. Many home winemakers start with kits, but fresh grapes give better results. Join a local home winemaking club for tips.
Frequently Asked Questions
What is the easiest grape to grow in Wyoming?
Valiant is the easiest. It survives -50°F, grows as a bush, and needs almost no care. It’s perfect for beginners.
Can you grow table grapes in Wyoming?
Yes, but choose cold-hardy varieties. Valiant and La Crescent are good for eating fresh. They are sweet and flavorful.
How long does it take for grapes to produce fruit in Wyoming?
Most grapes produce a small crop in year 3 and full production by year 5. Valiant may produce a few grapes in year 2.
Do grapes need a lot of water in Wyoming?
Young vines need regular water, but established grapes are drought-tolerant. Water deeply once a week during dry spells. Overwatering can cause root rot.
What is the best red wine grape for Wyoming?
Marquette is the best red wine grape. It has good flavor, ripens early, and survives cold winters. Frontenac is also good but more acidic.
Growing grapes in Wyoming takes some effort, but it’s rewarding. Start with one or two varieties and see what works in your area. With the right choices, you can enjoy fresh grapes and homemade wine from your own yard.
Remember to protect your vines from wind and winter cold. Prune them properly and harvest at the right time. You’ll be amazed at what you can grow in Wyoming’s tough climate.