Names
No scientific synonyms are recorded for this name.
Where it is recorded
This entry links at the genus level (Vitis) because the cultivated form is a hybrid or a group that the species lists do not carry.
Growth stages
- Initial: about 20 days (FAO 56 Table 11: planted April, Low Latitudes)
- Crop development: about 40 days (FAO 56 Table 11: planted April, Low Latitudes)
- Mid-season: about 120 days (FAO 56 Table 11: planted April, Low Latitudes)
- Late season: about 60 days (FAO 56 Table 11: planted April, Low Latitudes)
What the sources say it wants
Each line shows the band, then the kind of source and the citation. "Published" means the number is printed on the cited page; "derived" means it was computed from published numbers with the formula recorded on the row; "external API" rows are refreshed nightly from a live source; "curated" rows are OAT's own working values from June 2026.
Whole cycle
| Zone | Measure | Band | Source |
|---|---|---|---|
| Root zone | Root-zone EC (dS/m) | up to 1.5 (warning above 2.5, alert above 4.1) | published: FAO Irrigation and Drainage Paper 29, 1985 |
Initial
| Zone | Measure | Band | Source |
|---|---|---|---|
| Timing | Crop coefficient, initial stage (ratio) | 0.3 | published: FAO Irrigation and Drainage Paper 56, 1998 |
Mid-season
| Zone | Measure | Band | Source |
|---|---|---|---|
| Timing | Crop coefficient, mid-season (ratio) | 0.85 | published: FAO Irrigation and Drainage Paper 56, 1998 |
Late season
| Zone | Measure | Band | Source |
|---|---|---|---|
| Timing | Crop coefficient, end of season (ratio) | 0.45 | published: FAO Irrigation and Drainage Paper 56, 1998 |
Cultivar groups with their own numbers
The species row above carries the species-level bands. These groups differ enough in the sources that they keep their own rows.
Grapes (Wine)
- Crop coefficient, end of season (ratio): 0.45 published: FAO Irrigation and Drainage Paper 56, 1998
- Crop coefficient, initial stage (ratio): 0.3 published: FAO Irrigation and Drainage Paper 56, 1998
- Crop coefficient, mid-season (ratio): 0.7 published: FAO Irrigation and Drainage Paper 56, 1998
Keystone status
Partial. The KEEP rule asks for a growth stage and a band in each of light, air and root zone before a crop counts as complete; this plant is in the keystone with what its sources give so far.
Generated 2026-09-15 from the OAT plant keystone. Source types and citations are carried on every row; the keystone snapshot that the Library instruments read is plant-targets.json and its quality sheet is plant-targets.quality.json.