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Herbs, Flowers & Specialty CropsSpecialty Crop Harvest Calendar
Harvest dates for specialty crops move with weather and variety, so a useful harvest calendar tracks maturity cues and growing conditions rather than fixed days. Here is a way to build one.
Key points
- Use maturity cues and conditions, not fixed dates.
- Consider growing degree days where targets are published.
- Plan labor, cooling and packing alongside harvest windows.
- Keep records and revise the calendar each season.
What is a specialty crop?
USDA uses the term specialty crops for fruits, vegetables, tree nuts, dried fruits, horticulture and nursery crops, including floriculture. Many of the crops in this category, from cut flowers to herbs and berries, have short harvest windows and need hands-on timing. Check with your state department of agriculture and USDA Agricultural Marketing Service for program definitions and any support that applies.
Why not use fixed harvest dates?
Planting date, variety, temperature and rainfall all shift maturity. A calendar based on last year's dates can be off by weeks. Use maturity cues instead: size, color, firmness, sugar, seed dryness or flower stage, as described in extension fact sheets for each crop.
Where you do see a quoted window in a publication, treat it as a regional average, check which region it covers and confirm it with your county extension office.
Keep a simple weather log alongside harvest dates. A cool spring, a dry summer or a late frost can move maturity by days or weeks, and the log helps you explain and predict shifts.
How can growing degree days help?
Growing degree days add up daily warmth over the season and can predict stages for some crops better than calendar dates. Many state extension services and university weather networks publish degree day totals and crop-stage tables. If your crop has a published degree day target, compare your running total with it. For crops without published targets, keep your own records and look for patterns over several seasons.
Where a university publishes degree day tools, check whether they list your crop. If not, you can still log your own accumulated warmth using a station near you from NOAA or a state weather network.
Compare your calendar with other growers in your area. Local extension meetings, grower associations and farmers markets are good places to learn when crops come in during a typical year and what slowed things in a bad one. Share your own notes in return. Regional knowledge about weather, soils and varieties is often more specific than any published table, and a calendar that blends your records with local experience is stronger than one built from either alone.
How do you plan labor and capacity?
A harvest calendar should show not just when crops are ready but how many people, containers and cooler hours you need. Mark overlapping peaks on a single sheet. If three crops peak the same week, decide in advance which to prioritize, which to stagger next year and when to hire or arrange help.
Remember worker safety and hired labor rules, which vary by state. Your state department of agriculture or labor office can explain them.
- List each crop's harvest frequency and cutting stage.
- Note storage, cooling and packing needs.
- Mark sales days and deadlines.
How do you handle post-harvest and food safety?
Cooling, cleaning and handling affect quality and safety as much as timing. Food safety requirements for produce growers vary by farm size and sales channel, so check with your state department of agriculture and extension about rules that apply to you. For preserving harvests, use only tested methods from the National Center for Home Food Preservation or your extension service.
Plan packing and delivery as part of the harvest calendar. A crop picked on time but held too long before sale loses quality, so match harvest days to market and delivery days.
What records should you keep?
Record planting date, variety, first harvest, peak, last harvest, weather notes and problems. After a few seasons, patterns appear, such as how many days a cool spring delays a crop. These records also help with crop insurance questions, where the USDA Risk Management Agency and an insurance agent can explain which specialty crops are covered.
How do you revise the calendar each year?
At the end of each season, compare your plan with what happened. Move crops that conflicted, adjust succession spacing and note the variables that mattered most. A harvest calendar is a living document that gets more accurate each year.
Close the season with a short review meeting with yourself or your crew. Look at the calendar, note what surprised you and decide what to change. A few written lines on what you would do differently turn each harvest into better timing for the next.
Sources and further reading
Last reviewed: November 2026. Educational information, ranges only. Confirm timing with your county extension office.