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Harvest, Storage & Post-Harvest TimingHarvest Calendar for Herbs
Herbs are harvested for different parts at different stages, so a useful calendar is organized by plant type and plant stage rather than by month.
Key points
- Organize the herb calendar by plant part wanted: leaf, seed, flower or root.
- Pick leaf herbs before flowering and in small, repeated harvests.
- Use frost dates and soil temperature to set the season, not the month.
- Check state rules for ginseng, medicinal herbs and any herbs sold commercially.
Is there one harvest season for herbs?
No. Herbs are grown for leaves, seeds, flowers or roots, and each part is ready at a different time. Leaf herbs such as basil, parsley and mint can be picked lightly through much of the season. Seed herbs such as dill and coriander are harvested once the seed heads ripen. Root herbs need a full season or more.
Your calendar should list the part you want beside each plant. That one note changes the timing completely.
When is the best time to pick leaf herbs?
Many growers pick in the morning after dew has dried, when leaves hold plenty of flavor and the plant is not stressed by midday heat. Pick before the plant flowers if you want the most leaf flavor, since many herbs change character once they bloom.
Pinching the growing tips encourages branching and a longer picking season. Take a modest share at a time, and let the plant recover between harvests.
How do annual and perennial herbs differ on the calendar?
Annual herbs such as basil, dill and cilantro finish their life cycle in one year. Cool-season annuals bolt in heat, and basil is sensitive to cold, so these need succession plantings and frost planning. Use your local frost dates and soil temperature to set the start and end of the season.
Perennial herbs such as thyme, sage, oregano and chives return each year. They usually need a light first-year harvest to establish roots, then steadier picking afterward. Avoid heavy cutting late in the season in cold climates, because plants need time to harden before winter. Ask extension for guidance on your region.
What about seeds, flowers and roots?
For seed herbs, watch the seed heads. Harvest as the heads turn from green toward brown and before seed shatters on the ground. Cutting heads into a paper bag helps catch what falls.
Flowers such as chamomile are picked as they open. Root herbs are usually dug after the tops have finished growing. Regulations for some medicinal herbs, ginseng and similar crops vary by state and federal law, so check with your state department of agriculture before growing for sale. This site makes no medical claims about any herb.
If you ever treat herbs with any pesticide, the label is the law, and pre-harvest intervals apply even to leafy crops. Many products are not labeled for herbs at all. Contact your extension office for current recommendations, and protect pollinators when herbs are in flower.
How do you keep the calendar going year to year?
Record the date of first pick, the date plants bolted or bloomed, and the date of your last pick before frost or dormancy. Over time you will see a pattern for each plant in your garden.
For drying and storing herbs, follow tested methods from the National Center for Home Food Preservation or your extension office instead of improvised ones.
Can an example show the idea?
Take a small herb bed with basil, parsley, thyme and dill. Basil is sensitive to cold, so your calendar starts it after your last spring frost and ends it before your first fall frost. Parsley can usually be picked into cool weather. Thyme is a perennial and gets a light trim in the first year. Dill is cut for leaves early and left to flower if you want seed.
With four rows, you already have four different patterns. That is why a single herb harvest month rarely helps, and why the plant-by-plant approach works better. This is only an illustration, so use your own plants and local frost dates.
How do you avoid overharvesting?
Taking too much at once slows regrowth, especially in the first season. A steady habit of light cuts keeps plants bushy and productive. For perennials in cold regions, ease off picking as the season closes so the plant can store energy before dormancy.
Local extension offices can recommend how much to take and when to stop for the herbs you grow, and they know which ones overwinter in your area.
Sources and further reading
Last reviewed: November 2026. Educational information, ranges only. Confirm timing with your county extension office.