Growing tarragon in USDA Zone 2 means gardening in one of the coldest, shortest seasons in the United States. The average last spring frost falls in the Jun 1-15 range and the average first autumn frost in the Aug 15-Sep 1 range, leaving roughly eleven frost-free weeks in an average year. Those are USDA/NOAA zone averages, not promises for any one garden - check your local extension service. This guide covers when to plant tarragon zone 2.
Zone 2 at a glance
USDA Zone 2 has average winter lows of -50 to -40F, and frost can arrive in late August and linger into mid-June. Choose varieties rated for very cold climates, start indoors where the crop allows it, and protect plants at both ends of the season - a cold frame, cloche or low tunnel is often the difference between a harvest and an empty bed.
| Detail | Zone 2 guidance |
|---|---|
| Average last spring frost | Jun 1-15 (average/range) |
| Average first autumn frost | Aug 15-Sep 1 (average/range) |
| Winter lows | -50 to -40F |
| Days to germination | 10–14 days |
| Days to maturity | 60–90 days |
| Sowing method | both |
| Cold tolerance | hardy |
| Sun | full sun |
| Soil pH | 6.0–7.5 |
| Spacing | 18–24 inches |
| Water needs | low |
When to plant tarragon in Zone 2
Sow tarragon indoors or direct sow it once the soil can be worked. Because it is hardy, you can sow outdoors 2-4 weeks before the average last frost, roughly in mid-May, or start indoors 6-8 weeks before that date, roughly in mid-April, and transplant after the Jun 1-15 last-frost window. With 60-90 days to maturity, plants sown in mid-May are ready to pick from roughly mid-July to mid-August, comfortably inside the frost-free window that runs from early June to mid-August or early September.
Work back from the frost dates rather than from a calendar date: the planting calendar hub gives the Zone 2 picture month by month, and the frost date calculator turns your frost averages into sowing dates.
Starting tarragon in Zone 2
Tarragon seed germinates in 10-14 days. Sow thinly in seed-starting mix, keep the soil moist but not soggy, and thin or pot up seedlings so each plant has room to grow. French tarragon, the culinary type, is usually bought as a plant rather than grown from seed, because seed-grown plants are often the milder Russian type - if flavour matters to you, buy a named plant from a nursery. Harden off indoor-started plants for a week before they go outside.
In Zone 2, soil temperature matters as much as air temperature: a raised bed warms earlier, and black plastic laid over the bed for a week or two warms the soil before planting. Do not rush tender plants into cold soil.
Soil, spacing, sun and water
Tarragon grows best in full sun, in soil with a pH of 6.0–7.5. Test your soil through your local extension service rather than guessing, and dig in well-rotted compost before planting to improve drainage and moisture holding Space plants 18–24 inches apart - it is tempting to crowd plants in during a short season, but crowded plants stay small and invite disease, so use the plant spacing calculator if you are laying out a bed. Tarragon needs low water: water deeply and less often rather than lightly every day, water at the base in the morning so leaves dry before night, and mulch to keep the soil evenly moist. Check the soil a finger's depth down and water when it feels dry there.
Companion planting
Good companions for tarragon include tomatoes, peppers, marigolds, cabbage. The companion planting finder can suggest combinations for your whole bed. Rotate crops each year and avoid planting tarragon where the same family (Asteraceae) grew last year.
Pests and problems
The common pests and problems to watch for with tarragon are aphids, slugs, thrips. Inspect plants regularly, especially the undersides of leaves, and act early: hand-pick larger pests, wash aphids off with a strong jet of water, and remove badly affected leaves rather than waiting for the problem to spread. Healthy plants in the right soil and spacing resist pests better than stressed ones. If you are unsure what is eating your plants, the pest identifier helper can help narrow it down.
Cold is the biggest problem in Zone 2, ahead of any pest: a late spring frost or an early autumn frost can end the season overnight, so keep row cover ready and cover plants whenever frost is forecast.
Harvest and storage
Allow 60–90 days from sowing or transplanting to harvest, and pick regularly rather than leaving everything to ripen at once. Pick in the morning, handle gently to avoid bruising, and use promptly or freeze, dry or preserve the surplus. The harvest date calculator can turn your sowing or transplant date into a harvest window to watch for. If frost is forecast before the crop has finished, pick what you can rather than losing it to one cold night.
Tarragon is one of the easier herbs for Zone 2 because it is hardy and tolerates cold better than most herbs. It still needs a sunny, well-drained spot - wet soil in a cold spring is a bigger risk than frost itself. A plant in a raised bed or a pot with free-draining mix copes far better than one sitting in heavy, waterlogged soil.
Related Zone 2 guides in this series: Marjoram and Fennel - and the planting calendar hub for the full Zone 2 year.
Frequently asked questions
When should I plant tarragon in Zone 2?
Work back from the average last frost in the Jun 1-15 range: start indoors where needed, sow hardy crops a few weeks before that date, and do not put tender plants outside until frost is past.
Can I grow tarragon outdoors in Zone 2?
Yes, with the right variety and timing - but be realistic. The frost-free window runs roughly from early June to mid-August or early September, so choose varieties rated for very cold climates, start indoors where the crop allows it, and use a cloche or low tunnel for tender crops.
How long does tarragon take to grow in Zone 2?
Seeds germinate in 10–14 days, and the crop takes 60–90 days to maturity. In Zone 2, cool soil can slow growth, so allow the longer end of the range - and for perennial fruit and trees, count the wait in years, not weeks.
What soil and spacing does tarragon need in Zone 2?
Tarragon needs full sun and soil pH 6.0–7.5, spaced 18–24 inches apart. Dig in well-rotted compost, water deeply, mulch, and test your soil through your local extension service rather than guessing.