Winter wheat, cotton, tobacco in SC — three different phenological calendars, all resolvable with a multi-date NDVI series:

• Winter wheat — tiller → joint → boot → head → harvest (spring/early summer).
• Cotton — seeded late spring → pre-bloom → fruiting → boll → maturity/harvest (fall).
• Tobacco — transplanted spring → development → topping → harvest (summer).
• Source: Jensen, 2000.