Tuberous Jerusalem sage (Phlomis tuberosa)
At a glance
- Lifecycle
- Perennial (hardy)
- Exposure
- Full sun
- Frost limit
- −23.3 °C
Cultivation
Requires a well-drained soil in full sun with shelter from cold winds. Hardy to at least -15°c.
Propagation
Seed - sow spring in a greenhouse and only just cover the seed. The seed germinates quickly, prick out the seedlings into individual pots when they are large enough to handle and grow them on for their first year in a greenhouse. Plant them out in early summer. Division of the tubers in spring or autumn. If dividing in the autumn, it is best to store the tubers in a cool but frost-free place over the winter, planting them out in the spring. Spring divisions can be planted out straight away into their permanent positions.
Edible uses
Root - cooked but with a somewhat bitter flavour[K].
Habitat
Dry rocky ground amongst herbaceous vegetation.
Native range
E. Europe to Siberia.