European grape
Shoot growthVitis vinifera
Vitaceae · vine groundcover · introduced
Last updated
Quick Facts
Height
15-30 ft (unpruned); 4-6 ft (managed on trellis)
Spread
6-10 ft (managed on trellis)
Growth Rate
Fast
Light
Full Sun
Soil
Well Drained
Water
Low
Hardiness
Zone Zones 6–10
Bloom Time
June
Fall Color
Yellow, red, purple
Origin
Mediterranean region, Central Europe, southwestern Asia
Watch for this season
Downy MildewHigh
Spring New Growth - Early Infection Window
Powdery MildewModerate
Spring Emergence / Primary Infection
Field Observations
Field Observation
Vitis vinifera · Wine Grape
new leaves
April 23, 2026 · Issaquah · 1,596 GDD₃₂ · BBCH 11
Field Observation
Vitis vinifera · Wine Grape
bud break
April 20, 2026 · Issaquah · 1,509 GDD₃₂ · BBCH 07
Phenological Calendar
As of May 15, 2026, Puget Sound stations range from 1942.5 to 2137.2 GDD₃₂. European grape has passed shoot growth (1596 GDD₃₂).
Regional Season Tracker
GDD₃₂ accumulation across 7 Puget Sound stations · as of May 15, 2026| Station | GDD₃₂ | Current Stage | Next | To Go |
|---|---|---|---|---|
| Issaquah / East King | 2,137 | Shoot growth | — | — |
| Kent / Auburn | 2,130 | Shoot growth | — | — |
| Seattle / UW | 2,102 | Shoot growth | — | — |
| Olympia / Tumwater | 2,064 | Shoot growth | — | — |
| Tacoma / Puyallup | 2,033 | Shoot growth | — | — |
| Bellingham / Whatcom | 2,012 | Shoot growth | — | — |
| Sequim / Rain Shadow | 1,943 | Shoot growth | — | — |
| Stage | GDD32 | Typical Window |
|---|---|---|
| Bud break BBCH 07 | — | Mar 15-Apr 15 |
| ● Shoot growth BBCH 15 NOW | 1596 | Apr 15-May 15 |
| Bloom BBCH 65 | — | Jun 1-Jun 30 |
| Fruit set BBCH 71 | — | Jun 15-Jul 15 |
| Veraison BBCH 83 | — | Aug 1-Sep 1 |
| Harvest maturity BBCH 89 | — | Sep 1-Oct 15 |
| Leaf senescence BBCH 93 | — | Oct 15-Nov 15 |
Source: Field observation, Issaquah, WA, 2026-04-23 About GDD₃₂ →
Season tracker for Kent / Auburn as of May 15, 2026. Predicted dates use 16-day weather forecast through May 31, 2026, then climate normals.
Diseases: Regionally Documented (3)
Cultivars (2)
'Interlaken'
Seedless table grape. Early ripening; reliable in western WA. Sweet, golden-green fruit.
Good choice for Puget Sound home gardens
'Canadice'
Seedless table grape. Red, very sweet, early ripening.
Data Maturity Structured Multiple sources. Expert review underway.