Plants belonging to the Chelidonium genus are weedy hardy perennials or biennials that reach an height of between 60 cm and 1.2 m.
They have green leaves and yellow flowers from spring to summer.
Common names for members of this genus include Celandine poppy, Tetterwort, Celandine and Greater Celandines.
Chelidonium majus by Mick Talbot.
Chelidonium (Greater Celandine) by Franco Folini.
Common Names: Celandine, Celandine Poppy, Greater Celandine, Tetterwort.
Life Cycle: Hardy perennial. Hardy biennial.
Height: 12 to 48 inches (30 to 120 cm).
Native: Europe, Western Asia.
Growing Region: Zones 4 to 8.
Flowers: Spring through summer.
Flower Details: Yellow. Four petals.
Foliage: Bright green. Lobed. Wavy edges.
Sow Outside: Seeds: Surface. First month of spring or in autumn. Seeds should first be sown into flats. Next sink the flat into the ground in an area that offers shade, preferably close to a wall that faces north. Provide a glass/plastic covering. Transplant seedlings to final location when they look strong. Germination time: one month to one year. Spacing 12 inches (30 cm).
Sow Inside: No
Requirements: Full sunlight or shade. Moist soil. Chelidonium looks after itself – may grow wild and weedy; self seeds. More plants can be propagated by division in autumn (cool areas) or spring (warmer areas).
Miscellaneous: Invasive plant in many areas. Has many herbal uses, these include removing warts, narcotic use and to relieve toothaches.
Chelidonium should be grown outdoors. Seeds should be sown on the surface of flats in either the autumn or early spring. The flats should be shaded (north facing) and be covered in glass.
Once seedlings appear they should be transplanted at a spacing of about 30 cm into either a shaded or sunny part of the garden that has a moist soil.
Chelidonium plant species self seed and may require weeding to control them in the garden.