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Field Crops, Grains & OilseedsWheat Growth Stages and Calendar Timing
Wheat decisions are tied to growth stage, and the calendar differs a great deal between winter and spring wheat.
Key points
- Feekes and Zadoks are the two standard wheat staging scales.
- Winter and spring wheat run on different calendars, so plan each separately.
- Jointing is confirmed by finding the first node when you split a stem.
- Fertilizer and pesticide timing depend on stage and the label.
- Keep stage records so you can compare years.
What growth stage scales do wheat growers use?
Two scales are common. The Feekes scale numbers stages from tillering through heading and grain fill, and the Zadoks scale uses a two-digit decimal code that allows finer detail. Extension guides from Minnesota, Cornell, Idaho, South Dakota and others explain both and often show them side by side.
Feekes stage 6, when the first node of the stem becomes visible above the soil, is usually called jointing. Heading, flowering and grain fill follow. Knowing the scale your adviser or label uses prevents mistakes.
Wheat staging is easier with a hand lens and a photo guide. Keep a printed copy in the truck so you can compare plants in the field.
How do winter wheat and spring wheat calendars differ?
Winter wheat is seeded in fall, establishes and tillers, goes dormant in cold weather and resumes growth in spring, which means it needs a cold period to head. Spring wheat is seeded as soon as soil conditions allow in spring and completes its cycle in one season.
Either way, use your average frost dates and local extension planting recommendations. Hardiness zones describe winter minimum temperatures, not frost dates or planting dates, so they do not set a seeding date.
Variety also matters. Some winter wheats need a longer cold period than others and some spring wheats mature faster, so ask extension which varieties perform in your area.
How do you identify jointing and other key stages?
To check jointing, dig a few plants and split stems lengthwise with a knife. A hard node above the crown means the plant has reached jointing. Check several plants in several places, and stage the field by the majority.
University of Minnesota and Idaho guides include photos for each stage, which makes comparison simple.
Check a few plants from lower and higher spots in the field, since stage can differ with soil type, planting date and drainage.
- Dig plants rather than relying on appearance from the truck
- Split stems lengthwise to find the first node
- Compare against photo guides from extension
- Log the stage and date for each field
What does stage mean for fertilizer and weed control?
Nitrogen timing in spring for winter wheat is usually discussed around green-up and early jointing, and herbicide labels often restrict application to certain stages. The label is the law. Check it carefully, and ask extension or a licensed applicator for current advice since licensing rules vary by state.
Use a soil test and local recommendations for fertilizer, as nutrient management rules differ by state. Heavy rain, saturated soils and cold snaps change the plan, so be ready to adjust.
Soil moisture and stand condition affect these decisions too. A thin stand may call for a different plan than a thick one, so look at the field before you follow any schedule.
What risks come around heading and flowering?
Freeze damage after the plant has jointed can harm the developing head, and wet weather around flowering raises the risk of certain diseases. Extension programs publish risk tools and advisories.
Scout fields at heading and flowering, and talk to extension about current disease and insect advisories. Fungicide and insecticide decisions follow label directions, including pre-harvest intervals.
When is wheat ready for harvest?
After flowering, grain fills and then dries down. Harvest begins when kernel moisture reaches a level suited to your equipment and storage. Your extension office can give you the moisture range for your area.
Record the dates of green-up, jointing, heading and harvest each year and you will quickly learn how your own farm runs compared with the textbook.
Test weight and moisture at harvest, along with weather at the time, also explain a lot about quality, so jot those down with the dates.
What should you write down each season?
Record seeding date, variety, date of green-up, date of jointing, heading date, flowering date and harvest date for each field. Note frost events, hail, drought and disease pressure.
Over several years you will see how many days separate green-up from jointing on your farm and how weather shifts it. That is a more reliable calendar than any average in a bulletin.
If you farm both winter and spring wheat, keep separate logs. They respond differently to the same weather, and mixing the notes hides the pattern.
Sources and further reading
Last reviewed: November 2026. Educational information, ranges only. Confirm timing with your county extension office.