How to Grow Shiraz Clone 470
Shiraz Clone 470
Vitis vinifera cv. Shiraz Clone 470
vineShiraz Clone 470 is a premium wine grape cultivar renowned for producing bold, full-bodied red wines with dark fruit and spice characteristics. This clone is a selection of the Shiraz (Syrah) variety, developed to enhance specific flavor profiles and ripening patterns. It is prized by winemakers for its complexity, color intensity, and aging potential.
When should you plant Shiraz Clone 470 in your zone?
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Example Shiraz Clone 470 timeline · Pittsburgh, PA (Zone 6b)
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Plant Shiraz Clone 470
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Shiraz Clone 470
Around Sep 14≈ 150 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Shiraz Clone 470 dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in warm regions with extended growing seasons (zones 9-10), requires 180+ frost-free days
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Dormancy & Winter
8-12 weeksCanes are woody and bare; plant is in complete rest; ideal time for pruning and training
Prune during dormancy (late winter) to establish spur or cane-trained cordon systems; protect young vines from frost; apply dormant oil if needed for pest control
Bud Break & Shoot Growth
4-6 weeksPrimary buds swell and break; new green shoots emerge; tender leaves unfold
Monitor for spring frost damage; establish training structure; thin shoots if overcrowded; ensure consistent moisture; watch for downy mildew in humid conditions
Flowering & Fruit Set
3-4 weeksSmall green flowers appear in clusters; self-pollination occurs; tiny green berries form
Avoid excessive vigor or nitrogen fertilization that can cause poor flowering; maintain consistent irrigation; control powdery mildew; thin fruit clusters for quality concentration if desired
Véraison & Ripening
4-6 weeksBerries change color from green to deep purple-black; sugars accumulate; tannins mature; flavors intensify
Reduce irrigation to concentrate sugars and manage vigor; monitor sugar (Brix), acidity, and phenolic ripeness; remove excess leaves to improve sun exposure; control grape moths and wasps
Harvest
7-14 days for selective harvest windowBerries are fully ripe, dark purple-black, with balanced sugar, acid, and tannins; ready for crushing
Pick at optimal ripeness (typically 24-26 Brix for Shiraz Clone 470); harvest in cool morning hours; destem and crush promptly for winemaking; refrigerate bins if delaying processing
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Monitor with pheromone traps; thin fruit clusters to reduce density; hand-pick affected berries; apply sulfur or organic insecticides at early flight stages; release beneficial insects like Trichogramma
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Improve canopy airflow through targeted pruning; apply sulfur dust or horticultural oils every 10-14 days; plant resistant rootstocks if available; avoid high-nitrogen fertilization; manage humidity
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Apply copper fungicides or sulfur-based treatments preventatively; improve drainage and airflow; avoid overhead irrigation; remove infected leaves; use resistant rootstocks
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Hand-pick beetles in early morning; set traps away from vineyard; apply spinosad or neem oil; encourage native parasitoid wasps; avoid pheromone traps near vines
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Use phylloxera-resistant rootstocks (critical—Clone 470 is grafted for this reason); monitor for galls on roots; do not move infected soil; maintain strict quarantine protocols
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Monitor leaves for stippling; spray water to dislodge; apply miticides or sulfur in heat stress periods; introduce predatory mites; avoid broad-spectrum insecticides that kill natural predators
Uses
Premium Red Winemaking
CulinaryShiraz Clone 470 is primarily used for producing full-bodied, age-worthy red wines with complex dark fruit, peppery spice, and earthy notes. The clone's fruit composition and tannin structure make it ideal for single-varietal wines and high-end blends. [source]
Table Grape & Fresh Consumption
CulinaryWhile primarily a wine grape, the ripe berries can be consumed fresh, though they are small and seed-bearing. They are occasionally used in gourmet cooking, desserts, and as a garnish for upscale culinary presentations. [source]
Vineyard Terroir Expression
CraftClone 470 is highly responsive to terroir, producing distinctly different wines based on soil mineralogy, climate, and canopy management. Winemakers use this clone specifically to showcase regional characteristics and site-specific flavor profiles. [source]
Pollinator & Beneficial Insect Support
WildlifeShiraz vines flower abundantly and provide nectar and pollen for bees, wasps, and beneficial insects. The dense canopy also offers habitat for predatory insects that control vineyard pests. [source]
Ornamental Vineyard Landscape
HouseholdBeyond winemaking value, mature Shiraz Clone 470 vines trained on trellises provide attractive shade structures, seasonal color changes, and architectural interest in estate landscapes and agritourism settings. [source]
Harvest Tips
Shiraz Clone 470 typically reaches harvest ripeness in mid to late harvest season (September-October in Northern Hemisphere). Pick grapes when Brix reaches 24-26°, pH is 3.3-3.6, and titratable acidity is 5-7 g/L. For winemaking, assess phenolic ripeness of seeds and skins (tannin maturity) alongside sugar ripeness. Harvest in early morning to preserve acidity and freshness. Use clean, sulfited bins; process within hours for optimal fermentation quality. Selective harvesting of perfectly ripe clusters improves wine complexity.
Fun Facts
- 🌱 Shiraz Clone 470 was developed and selected in Australian vineyards, where it became famous for producing some of the world's most prestigious Shiraz wines, particularly from regions like Barossa Valley and McLaren Vale.
- 🌱 This specific clone is known for its ability to ripen reliably even in cooler vintage years, making it a strategic choice for producers managing climate variability and vintage consistency.
- 🌱 Clone 470 produces notably smaller berries and tighter fruit clusters than some other Shiraz clones, which can reduce disease pressure but requires careful canopy management to prevent shading and mildew development.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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