Sweet cicely (Myrrhis odorata)

Photo: H. Zell, CC BY-SA 3.0 · source

Herb · Apiaceae

Sweet cicely

Myrrhis odorata

In other languages: Roomse kervel (Nederlands) · Cerfeuil musqué (Français)

Sweet cicely is a perennial herb from the mountains of southern Europe that has become naturalised here and there in western Europe. It forms a lush clump about 1 m tall, with soft, fern-like leaves that smell and taste of aniseed. In May and June it carries white umbels, followed by long, glossy seeds that start green and ripen to dark brown. It is one of the few herbs that is happy in part shade, and its foliage appears very early in spring. In the kitchen you can use the leaves, flowers and young seeds.

Caution: Umbellifers look alike and some are deadly poisonous, such as hemlock. Only harvest plants you recognise with certainty by their strong aniseed smell.

  • Light

    Partial shade or shade

    tolerates little sun

  • Moisture

    Normal

    no wet feet

  • Legal basis

    Sand, loam or clay

    any pH

  • Hardiness

    Fully hardy

    down to -30 °C

  • Size

    1 m

    tall, 0.6 m wide

  • Flowering

    May–June

Key facts
Pruning monthsJune–July
Height1 m
Native to BelgiumNo, planted
Good for bees, butterflies and birdsYes, for bees
Poisonous to people and petsIn part: see Caution above
FloweringMay–June

Identify

Sweet cicely: how do you recognise it?

Habit
Perennial with a thick taproot, forming a bushy clump about 1 m high and 50–60 cm wide.
Leaves
Large, two to three times pinnate, softly hairy and light green, sometimes with white flecks; smells of aniseed when crushed.
Flowers
Small white flowers in compound umbels, from May to June.
Fruit
Long, narrow, ridged seeds about 2 cm long: green at first, glossy dark brown when ripe.
Roots
A thick, deep taproot: an old plant is hard to move.

Flowering: May–June · Harvest and fruit: March–July · Sowing: September–November · Plants: March–April and September–October · Pruning: June–July

In your garden

Why grow it?

  • Grows well in part shade, where many other herbs struggle.
  • The foliage appears early in spring and has a mild aniseed flavour.
  • A natural sweetener for tart fruit such as rhubarb and gooseberries, so you need less sugar.
  • The white umbels attract bees and hoverflies.
  • A perennial: plant once, harvest for years, and it self-seeds.

Sweet cicely: where does it grow best?

  • Part shade to shade; in full sun it dries out and the leaves turn yellow.
  • Ordinary garden soil: sand, loam or clay, acid to chalky, preferably rich in humus and not too dry.
  • Give it a permanent spot, because you do not want to disturb the taproot.
  • Allow 50–60 cm per plant; the clump gets large.
Light
Partial shade and shade
Soil type
Sand, loam or clay
Acidity
Not fussy
Moisture
Normal
Size
1 m tall, 0.6 m wide
Hardiness
Hardy (to -30 °C)

Goes well with

  • Hosta: The same part shade; large smooth leaves beside fine, feathery foliage.
  • Ferns: Fresh green underplanting with a similar structure.
  • Lady’s mantle: Soft yellow flowers and rounded leaves at the front of the border.
  • Rhubarb: A good pair in the kitchen: the sweet leaves take the edge off the acidity.

Maintenance

Sweet cicely: when and how to plant it?

Plant in March–April and September–October.

  1. Plant in March–April or September–October, when the soil is neither frozen nor waterlogged.
  2. Dig a hole as deep as the pot and twice as wide, and mix in a little compost.
  3. Set the plant at the same depth as in its pot, 50–60 cm from its neighbours, and firm the soil.
  4. Water in well straight away and keep the soil moist during the first year.
  5. Spread a layer of leaf mould around the base to keep the soil cool and moist.

Care

Water
Keep the soil slightly moist. In long dry spells water, or the leaves turn yellow and flop.
Feeding
A spadeful of compost in spring is enough; too much feed gives floppy foliage.
Harvesting
Pick young leaves from April to autumn and use them fresh: drying loses much of the aroma. Chop them into fruit salad, rhubarb compote, yoghurt or dressing. The green seeds are edible too.
Spent flowers
Cut the umbels off before the seed ripens if you do not want self-sown seedlings; leave a few to collect seed.
Mulching
A layer of leaf mould in spring keeps the soil cool and moist.

Tip: Cut off the umbels after flowering and cut the clump back to 10–15 cm: you get fresh, soft leaves for the kitchen and no seedlings everywhere.

Sweet cicely: when to prune it?

Pruning months: June–July.

When: Straight after flowering, in June or July, before the seed ripens and the foliage tires.

How:

  • Cut off the faded flower stems just above the foliage.
  • For fresh leaves, cut the whole clump back to 10–15 cm; it regrows quickly.
  • In late winter, clear away dead leaf debris.

Caution: If you leave the umbels, the plant self-seeds freely and you will find seedlings everywhere.

Pruning: when and how · Pruning calendar and basic rules

Propagation

Seed
Sow fresh seed from September to November in place or in a pot outdoors. The seed needs a cold spell and comes up in spring; seed sown only in spring germinates slowly and unevenly.
Division
In autumn or early spring, divide a young clump with a sharp spade. Dig deep, because the taproot is thick.
Moving seedlings
Move young seedlings in spring while the taproot is still small.

Sweet cicely: how does it get through the winter?

Hardy to −30 °C.

  • Fully hardy, down to about −30 °C: no protection is needed.
  • In cold winters the foliage largely dies back; the plant simply regrows in spring.
  • A thin layer of compost or leaves around the base is welcome but not necessary.

Diseases and pests

  • Confusion with hemlock: Umbellifers such as hemlock look similar and are poisonous. Sweet cicely smells strongly of aniseed and has softly hairy, light green leaves; hemlock has hairless stems blotched with purple. Never pick anything you are not sure about.
  • Powdery mildew: White powder on the leaves, mostly in dry summers. Water, leave space and cut off affected foliage; the plant regrows.
  • Slugs: Young plants and seedlings are nibbled in spring. Search for them in the evening and remove them by hand.
  • Seedlings everywhere: If you leave the umbels, you will find young plants all over the border next year. Cut off the umbels or weed out the seedlings.

Through the year

  • February: Clear away dead leaf debris.
  • March: Plant or move. Apply compost.
  • April: Plant. Pick the first leaves.
  • May: Flowering starts. Pick leaves for the kitchen.
  • June: Flowering. Cut back after flowering. Pick green seeds.
  • July: Cut back again if you want fresh leaves. Water in dry spells.
  • August: Seed ripens: collect it or cut off the umbels.
  • September: Sow fresh seed. Plant.
  • October: Sow and plant. Divide old clumps.
  • November: Sow. Clear away dead foliage.

Use

Edible and useful

Leaves (March–June)
Pick the soft, fern-like leaves from March to June; they appear early in spring. They taste sweetly of aniseed and are a natural sweetener: cook a handful with rhubarb, gooseberries or other sour fruit and you will need less sugar. Also chopped into salads, omelettes and cream.
Seeds (June–July)
The long green seeds in June and July are crunchy and sweet like aniseed sweets: eat them fresh, in a fruit salad or with ice cream. Ripe brown seeds are too hard and fibrous.
Storing
The leaves are best fresh; dried they lose much of their aroma. They can be chopped and frozen. The green seeds keep for a few days in the fridge, or you can preserve them in sugar syrup or vodka.

Caution: Sweet cicely belongs to the carrot family: do not confuse it with the very poisonous hemlock or fool’s parsley. Sweet cicely smells clearly of aniseed when you crush a leaf, has soft, slightly hairy leaves with white flecks and grows in partial shade. Only harvest from a plant you planted yourself or recognise with certainty.

Eating and using is at your own risk: see the terms of use.

Recipes

Good for wildlife

Bees
Nectar and pollen for honeybees and wild bees.

You and this species

Did you know?

  • The leaves are naturally sweet and taste of aniseed. With rhubarb or gooseberries you need less sugar as a result.
  • The name Myrrhis refers to the scent: the Greek word is related to myrrh, an aromatic resin.
  • In the wild it grows in cool, shady mountain meadows and woodland edges in southern Europe.

Garden plants · All species

Laden…