Itasca Grape
Itasca Grape
The Newest Cold-Hardy White Wine Grape from the U of MN
Itasca Grape (Vitis 'Itasca') is the University of Minnesota's flagship white wine grape — bred for naturally lower acidity and higher sugar than older cold-hardy whites, producing refined, crisp wines with pear, melon, and floral notes. It carries the program's signature hardiness (to roughly -30°F), good disease resistance, and self-fertility, needing only full sun and a sturdy trellis. Whether you're starting a backyard vineyard in Edina, covering an arbor in Maple Grove, or refining your home winemaking in Woodbury — Itasca is a premium choice for zone 4b–5a (and colder) gardens.
Itasca Grape Plant Details
| Attribute | Detail |
|---|---|
| Scientific Name | Vitis 'Itasca' (U of MN) |
| Plant Type | Deciduous fruiting vine (wine grape) |
| Mature Length | 15–20+ feet on a trellis; train to your system |
| Sun | Full sun (8+ hours) for ripening and sugar |
| Water | Moderate while establishing; fairly drought-tolerant once rooted |
| USDA Zones | 3–8 (Twin Cities is zone 4b–5a); hardy to about -30°F |
| Soil | Well-draining; tolerates a range of soils. Avoid wet, low spots; good air drainage reduces disease. |
| Pollination | Self-fertile — a single vine will fruit |
| Use | Dry white wine; lower acid, higher sugar, with pear and melon notes |
| Harvest | Early to mid-September in the Twin Cities |
| Winter Hardiness | Excellent — to roughly -30°F |
Itasca Grape Uses in Minnesota Landscapes
Premium backyard vineyard
Itasca's balanced chemistry makes it the go-to for serious cold-climate dry whites. Train it on a two-wire trellis in full sun in a Plymouth yard.
Arbors and screens
Vigorous enough to cover an arbor or pergola for summer shade and a fall harvest in Eden Prairie.
Dry white wine
Its lower acidity needs less correction in the cellar, making clean, food-friendly whites prized by home and craft winemakers.
Best Time to Plant Itasca Grape in Minnesota
Plant in spring (late April–May) after hard frost so the vine has a full season to establish. Fall planting is not recommended for grapes here. Never plant after mid-October.
How to Plant Itasca Grape
- Choose the sunniest, best-drained spot — a south or west slope is ideal for ripening and air drainage.
- Install the trellis before or at planting; grapes need sturdy support from year one.
- Dig a hole 2–3× the root width; backfill with native soil and some compost. Don't over-fertilize.
- Space vines 6–8 feet apart along the trellis.
- Water in well and mulch lightly, keeping mulch off the trunk.
- The first two years, train a single strong trunk and remove fruit so the vine builds structure.
Watering Itasca Grape in Minnesota
First Year Watering Schedule
- Weeks 1–2: Every 2–3 days, deep and slow
- Month 1–2: Every 4–5 days
- Month 3–6: Weekly; deep but infrequent watering encourages deep roots
- Stop watering 2–3 weeks before ground freeze (typically late October in the Twin Cities).
After Year One
Established vines are fairly drought-tolerant; water only during extended dry spells. Avoid a constantly wet root zone, which invites disease.
What makes Itasca special?
It's the U of MN's first cold-hardy grape bred specifically for dry white wine, with naturally low acid and high sugar that simplify winemaking.
When and how do I prune it?
Prune in late winter while dormant, removing about 80–90% of last year's growth. Grapes fruit on new shoots from one-year-old wood.
Will it survive a Minnesota winter?
Yes — to about -30°F. No burial needed; site it for good air drainage.
You May Also Like
- La Crescent Grape — an aromatic, very hardy white
- Frontenac Gris Grape — a white with peach and apricot notes
- Marquette Grape — a complex hardy red companion