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How to Grow Blanc du Bois Grape

Wikipedia

Closest match — some photos here may show the parent species rather than this specific variety.

Blanc du Bois Grape

Vitis vinifera hybrid

vine

Blanc du Bois is a white wine grape variety developed specifically for warm, humid climates, particularly in the southern United States. This hybrid cultivar produces medium-sized golden berries with a crisp, slightly herbaceous flavor profile ideal for white wines. It is known for its disease resistance and adaptability to challenging growing conditions.

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Example Blanc du Bois Grape timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Blanc du Bois Grape

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Blanc du Bois Grape

    Around Aug 15

    ≈ 120 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Blanc du Bois Grape dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 8+ hours daily (essential for ripening and sugar development)
💧
Water: Moderate and consistent watering; drip irrigation preferred. Provide 1-1.5 inches per week during growing season. Reduce water as grapes ripen. Avoid overhead watering to minimize disease pressure.
📏
Spacing: 60 inches
📅
Days to maturity: 120-140 days from bloom to harvest (typically September-October in warm regions)
🌱
Planting depth: Bareroot vines: plant at same depth as nursery soil line; container vines: same depth as container

Soil

Type: Well-draining loamy soil with moderate fertility
pH: 5.5-7.0
Amendments:
Compost aged manure sulfur if pH is too high lime if pH is too low

Growing Zones

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Thrives in zones 8-10; specifically bred for the Gulf Coast and warm southern regions

8a 8b 9a 9b 10a

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Growth Stages

1

Dormancy & Pruning

December-March

Grapevines are leafless and dormant during winter months. Canes are woody and visible.

Prune during dormancy (January-February in the South) to remove weak wood and shape the vine. Leave 2-3 buds per spur for optimal fruit production.

2

Bud Break & Shoot Growth

March-May

Green shoots emerge from buds, leaves unfurl, and rapid vegetative growth begins.

Provide irrigation as soil dries out. Monitor for spring pests and diseases. Tie young shoots to support structure. Apply dormant oil if needed for pest management.

3

Flowering & Pollination

May-June

Tiny flower clusters appear and bloom. Flowers are self-fertile and typically wind-pollinated.

Maintain consistent watering—critical for fruit set. Avoid excessive nitrogen fertilizer which promotes vegetative growth over flowering. Do not prune during this stage.

4

Fruit Development & Veraison

June-September

Small green berries form and enlarge. As veraison occurs, berries turn golden-yellow, sugar accumulates, and acidity decreases.

Thin fruit clusters if overly dense to promote larger berries and better ripening. Reduce irrigation slightly to concentrate sugars. Monitor for powdery mildew and other fungal issues.

5

Harvest & Dormancy

September-December

Berries reach full golden color with peak sugar content and desired flavor profile. After harvest, vines drop leaves and enter dormancy.

Harvest when Brix reaches 18-22° (sugar content). Use pruning shears to cut clusters. Cease fertilizing after harvest to encourage dormancy.

Companion Planting

Plan your garden →

Plant with:

Basil Marigold Buckwheat Clover Borage

Avoid planting near:

Black walnut Fennel Mint (spreading varieties) Cabbage family

Common Pests

  • Hand-pick early morning; use pheromone traps away from vines; apply neem oil or insecticidal soap if infestation is severe

  • Use phylloxera-resistant rootstocks; maintain well-drained soil; remove infested vines if detected

  • Ensure good air circulation through pruning; apply sulfur powder or potassium bicarbonate; use fungicide if severe

  • Improve drainage and air circulation; apply copper-based fungicides; prune infected leaves

  • Remove infected fruit and leaves; apply fungicide in spring; practice good sanitation and pruning

  • Spray with water to dislodge; apply neem oil or sulfur; maintain humidity if possible

Uses

🍳

White Wine Production

Culinary

Blanc du Bois is primarily cultivated for its exceptional white wine production in warm climates where traditional European varieties struggle. The grapes produce crisp, clean wines with herbaceous and citrus notes. [source]

🍳

Fresh Eating & Juice

Culinary

While bred for winemaking, the sweet golden berries can be enjoyed fresh off the vine or processed into juice and beverages with a refreshing, slightly tart flavor. [source]

🏠

Landscape & Shade Structure

Household

Vigorous vines trained on pergolas, arbors, or trellises create beautiful green infrastructure while producing fruit. The dense foliage provides natural cooling and aesthetic appeal. [source]

💊

Resveratrol & Antioxidants

Medicinal

Grape skins contain resveratrol and other polyphenolic compounds with potential cardiovascular and anti-aging benefits, particularly present in wines made from high-quality fruit. [source]

🦋

Wildlife & Pollinator Support

Wildlife

Grape flowers attract bees and other pollinators, while berries provide food for birds and beneficial insects, supporting local ecosystem health. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Harvest clusters when berries reach golden-yellow color and sugar content is 18-22° Brix (use a refractometer for accurate measurement). Taste berries for desired flavor balance between sugar and acidity. Pick in the morning when temperatures are cooler. Cut clusters with pruning shears rather than pulling. For winemaking, harvest when all berries in the cluster are uniformly ripe.

Fun Facts

  • 🌱 Blanc du Bois was developed in Florida by Dr. John Mortensen at the University of Florida specifically to overcome the challenges of growing wine grapes in the humid Gulf Coast climate where European varieties are susceptible to mildew and rot.
  • 🌱 The variety name 'Blanc du Bois' means 'White of the Woods' in French, reflecting its hybrid heritage and intended rustic, forgiving nature.
  • 🌱 Blanc du Bois grapes can produce wine with alcohol content ranging from 11-13%, similar to traditional crisp white wines, despite being grown in warm climates where ripeness is abundant.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Cultivar Full Sun Hybrid
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