How to Grow Alexanders USA

By the SoilCommander Editorial Team, under the guidance of Nitin Sharma, Co-Founder · · How we check our facts

On this page
  1. Alexanders (Smyrnium olusatrum)
  2. Quick Facts
  3. Soil & Growing Conditions
  4. Growth Stages
  5. Harvest & Storage
  6. Alexanders, a Forgotten Pot Herb
  7. Plan your Alexanders planting
  8. Growing Alexanders in another region
  9. Sources

Alexanders (Smyrnium olusatrum) — biennial.

Core growing advice on this page is checked against named horticultural sources — see References.

Alexanders (Smyrnium olusatrum)

A mass of Alexanders plants growing wild — “Alexanders, Smyrnium olusatrum - geograph.org.uk - 7471399” by Chris Morgan is licensed under CC BY-SA 2.0.

4 sources cited · Verified

Quick Facts

A mass of Alexanders plants growing wild
A mass of Alexanders plants growing wild. Photo: “Alexanders, Smyrnium olusatrum - geograph.org.uk - 7471399” by Chris Morgan, CC BY-SA 2.0.
Factor Value
Soil texture sand, clay, chalk or loam (RHS)
Drainage well-drained
Lifecycle biennial
Edible parts leaves, stems, flowers, seeds, roots

Soil & Growing Conditions

A whole flowering Alexanders plant
A whole flowering Alexanders plant. Photo by Robert Flogaus-Faust, CC BY 4.0.

Water: moist but well-drained or well-drained (RHS)

Growth Stages

Close-up of Alexanders' greenish-yellow flower umbel
Close-up of Alexanders' greenish-yellow flower umbel. Photo by Didier Descouens, CC BY-SA 4.0.
Stage BBCH Notes
Sowing 0 Propagate by seed, in free-draining soil in full sun (RHS).
Semi-evergreen leaf growth 3 Vibrant green, glossy leaves develop on the solid, later hollow and grooved stem, growing well in coastal areas (RHS, Foraging and More).
Flowering 6 Greenish-yellow flowers with a pungent, myrrh-like scent appear in umbrella-like clusters (RHS).
Harvest (all parts edible) 8 All parts can be harvested -- leaves, stems, flowers, seeds and roots -- with older leaves and stems typically cooked to reduce bitterness (Foraging and More).

Harvest & Storage

An Alexanders plant flowering among wildflowers in a field
An Alexanders plant flowering among wildflowers in a field. Photo by Agnieszka Kwiecień, Nova, CC BY-SA 4.0.

When to pick: All parts are edible -- leaves, stems, flowers, seeds and roots -- with a very strong celery-like taste; older leaves and stems are typically cooked due to their bitterness (Foraging and More).

Plan your Alexanders planting

When to sow and plant Alexanders depends on your own frost dates. Check the USA vegetable planting calendar. To work out where it fits in your beds, sketch your plot in the free Garden Layout Planner.

Growing Alexanders in another region

Sowing dates, frost timing and local advice differ by country. Use the guide for where you garden.

Sources

The full list of 4 sources behind this guide (Foraging and More, Foraging Course Company, Plants For A Future (PFAF) and others) is in the references of our UK guide to alexanders; they describe the plant itself, which is the same wherever it grows.

Plan next season before the problems start

Almost everything on this page resolves to your own frost dates rather than the calendar — the last spring frost moves by roughly two months between zone 3 and zone 10. The USA Garden Planner works from your zone so the timing is already decided before the season starts.

Get the USA Garden Planner →

Instant PDF download · Written for US growing conditions

SoilCommander Editorial Team — under the guidance of Nitin Sharma, Co-Founder

Every growing guide is checked against RHS, USDA Cooperative Extension, and other named horticultural authorities before publishing. How we check our facts.

How this guide is put together

The growing data on this page — sowing windows, pests, diseases, soil and site requirements — comes from named horticultural sources, listed in References below, checked against USDA hardiness-zone and frost-date data, with Cooperative Extension sources cited directly where one exists for a crop. An automated pipeline assembles that verified data into the page you're reading: it selects which facts to lead with and builds the surrounding prose and layout. It does not invent a date, a source or a number — where a verified value for a field isn't available, the page leaves it out rather than guessing. A person reviews and publishes each page; nothing goes live unverified.

Vegetable Growing Guides USA

Last verified 2026-09-02

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