Valeriana are hardy perennials that reach from 15 to 90 cm (6 to 36 inches) in height.
They bloom in the summer, and carry clustered heads of tiny white or pink flowers on branches.
Some of the common varieties of Valeriana grown in the garden include Valerian and Garden Heliotrope.
Check out my guide on how to grow Valeriana officinalis.
Valeriana obtusifolia by Pato Novoa.
Valeriana officinalis by Pamla J. Eisenberg.
Common Names: Garden heliotrope, All-heal, Valerian: Garden; Alpine; Mountain; Spikenard; Californian; Marsh.
Scientific Name: Valeriana dioica; V. hardwickii; Valeriana officinalis; V. pyrenaica.
Life Cycle: Hardy Perennial.
Height: 6 to 60 inches (15—150 cm).
Native: Europe, Americas, and western Asia.
Growing region: Zones 4 to 9.
If you plan to grow Valerian from seeds outdoors, then sow at the start of spring, and lightly cover the seeds.
The spacing that you sow at depends on the species of Valeriana. Sow small ones from 15 to 30 cm (6 to 12 inches) apart, and larger species from 45 cm to 60 cm (18 to 24 inches) apart.
Ideally Valerian should grow in a sunny or partially shaded part of the garden, that has a moist rich soil. Ideally pH should be from 5.5 to 7.0.
If first growing indoors, then start about three months in advance. The germination time of Valeriana is about three weeks when done at a germination temperature of 20 to 23 degrees centigrade(68-73°F).
Transplant the young Valeriana seedlings into the garden following the last frost.
It is pretty easy to look after Valeriana plants such as Valerian and Garden heliotrope.
They enjoy a moist soil, so keep them well watered. Stake larger Valeriana species. Deadhead flowers before seed set. Divide every three years to maintain vigour.
If you want to propagate Valerian, then divide in spring or autumn.