It is a herbaceous perennial plant growing to 1-1.5 m tall. The leaves are arranged in opposite pairs, the leaves on the lower part of the stem up to 15 cm long, decreasing in size higher up the stem. The flowers are dark blue-purple.
Calendar| I | II | III | IV | V | VI | VII | VIII | IX | X | XI | XII | |
| Sow outdoors | ||||||||||||
| Flowering |
| Climate Zone | Mediterranean |
|---|---|
| Flower colour | Blue, Purple |
| Life cycle | Perennial |
| Plant use | Balcony & Courtyard, Baskets & Containers, Coastal garden, Cottage garden, Essential Oil, Medicinal, Urban garden, Wild garden |
| Seeds per gram | 500 |
| Soil - Moisture | Well-drained |
| Sunlight - Exposure | Partial shade, Sun |
| Watering | Regular |