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Herbs, Flowers & Specialty CropsBuilding a Specialty Crop Calendar for Market Growers
Market growers sell on set days, so a calendar must connect planting to sales. This guide shows how to build one from the end date backward.
Key points
- Work backward from market days and sales deadlines.
- Use your own frost dates and days to maturity, and plan slack.
- Stagger plantings for steady supply and check labor and space each week.
- Check licensing, safety and insurance questions with the right offices, and review every season.
Where should you start a market crop calendar?
Start with the sales calendar, not the planting calendar. List market days, wholesale deadlines, seasonal events and the weeks when each crop should be available. Then work backward through days to maturity, transplant date and seed start date for each crop.
Anchor everything to your own average last spring and first fall frost dates, which your extension office or the National Weather Service can supply. Treat them as averages and plan some slack.
Draw the calendar as a simple grid with weeks across the top and crops down the side. Shade the weeks for seed start, transplant, harvest and sales. Gaps and overlaps become obvious at a glance.
How do you convert days to maturity into dates?
For each crop, take the target first-harvest date, subtract days to maturity from the packet or extension source and then subtract the weeks needed for seedling production if you transplant. For example, if you want a crop on your table in mid-July and it needs about 60 days from transplant plus 5 weeks of seedling growth, count back from mid-July to find both dates. Treat the result as a starting estimate, since cool or hot weather moves maturity.
Use a few simple tools. A paper wall calendar, a spreadsheet saved as a CSV file or a notebook all work, as long as you update it weekly. Color-code seed start, transplant, harvest and sales. Keep one master sheet for the farm and a small one for each crop with variety, dates and notes. The best tool is the one you will actually use during the busy season, so choose something quick, and move to anything more elaborate only after the basic habit is established.
How do you plan succession for steady supply?
Customers want regular supply, so stagger plantings of crops with short harvest windows. Decide how many weeks each crop should be available and how many plantings that takes. Record actual harvest windows to refine your spacing.
Mix crops with different seasons so that a gap in one is covered by another.
Be honest about how much you can sell. Overplanting a crop you cannot move wastes labor and bed space, while underplanting a proven seller loses income. Use last year's sales records to size each planting.
- Quick crops: plant every couple of weeks.
- Long-season crops: plan one or two plantings and protect them.
- Perennials and orchard crops: add steady anchors.
What should you add for labor, space and equipment?
Check bed space, greenhouse capacity, cooler space and labor hours for each week. A calendar that looks good on paper may overload one week. Mark peak weeks and decide how to relieve them. Hired labor rules and worker safety requirements vary by state, so check with your state department of agriculture or labor office.
What regulations and business checks apply?
Selling food or plants may involve licensing, food safety rules, sales tax and market rules that vary by state and county. For specific crops such as hemp, tobacco, ginseng or mushrooms, separate regulations apply, and your state department of agriculture can explain them. For financial and risk questions, talk to your USDA Farm Service Agency office, the Risk Management Agency and a crop insurance agent.
How do you build in weather and risk buffers?
Keep row cover, shade cloth and irrigation ready. Plant a small backup batch of key crops a week or two behind the main one. Track weather each season so you know how often a late frost or heat wave disrupted plans. Follow local water rules when planning irrigation.
Keep a weekly note during the season about what you changed and why. At year's end, that note is the quickest way to improve the calendar.
How do you review and improve the calendar?
After each season, compare planned and actual dates for sowing, transplanting, first harvest and last harvest. Note which crops sold well and which wasted space. Update the calendar with your own dates, and keep a short list of changes for next year. Over several seasons the calendar becomes more reliable than any generic chart, because it reflects your soil, microclimate and market.
Finally, share the calendar with anyone who works with you. A crew that knows the plan can spot problems early, and a calendar everyone can read keeps planting, harvest and market tasks in step through the busiest weeks of the season.
Sources and further reading
Last reviewed: November 2026. Educational information, ranges only. Confirm timing with your county extension office.