Alexanders

Herbaceous

Alexanders

Smyrnium olusatrum

Also known as: Horse Parsley, Black Lovage

Herbaceous Apiaceae EdibleWildlife AttractorBorder PlantDynamic Accumulator
Hardiness Zone
5-9
Ideal Temp
45–78°F
Survives Down To
10°F
Life Cycle
Perennial

Alexanders arrived with Europeans and naturalized along coasts and roadsides — glossy, celery-ish leaves, yellow-green umbels, black seeds. It was a winter pot-herb before celery breeding took over. All parts are edible with proper timing and ID confidence; never confuse wild Apiaceae with toxic lookalikes. subtropical and tropical Americas coastal counties already host escapes; in the garden it behaves like a bold biennial that feeds early pollinators when little else is blooming. ☀️💧 Sun and Water: - Full sun to light shade. - Moist, fertile soil; tolerates coastal influence. - Regular water in dry spells. ✂️ Propagation: - Seed in fall or early spring; self-sows where happy. - Transplant young rosettes in cool weather.

Good Neighbors
  • Fennel
  • Dill
  • Mustard
Cautions
  • Total shade and boggy stagnation
Known Threats — Organic Solutions Only
Aphids
Aphidoidea
Carrot Fly
Psila rosae
Carrot Rust Fly
Psila rosae
Carrot Weevil
Listronotus oregonensis
Celery Leaf Miner
Gracillariidae sp.
Dill Worms
Lepidoptera larva
Parsley Worms
Depressaria sp.
Parsnip Canker
Sclerotinia sclerotiorum
Swallowtail Caterpillar
Papilio polyxenes