Lithodora are half hardy or hardy perennial subshrubs that range from 15 cm to 1.2 m (6 to 48 inches) in height.
They carry star shaped funnel flowers of blue, white, yellow or purple. The time they flower depends on the species, usually in the spring or summer; but some Lithodora varieties flower twice a year, in spring and in autumn.
Common names for Lithodora include Indian Paint, Gromwell and Puccoon.
Lithodora picture by Paul Schultz.
Lithodora white star photograph by tracie7779.
It is not recommended to try to grow Indian Paint and other Lithodora species from seeds but to take cuttings in the middle of summer, or to purchase plants from a garden centre.
Lithodora should preferably grow in a sunny (will be ok in a partially shaded) part of the garden, and has a preference for an acidic soil that is moist and well drained. They should be planted from 20 cm (8 inches; small Lithodora species) to 45 cm (18 inches; large Lithodora plant varieties) apart.
Once established, Lithodora are fairly easy to look after. They should be watered in hot weather and the soil kept moist. Once flowering has finished the plant should be trimmed. It is best to mulch the plant in the winter.
The Lithodora genus has six species. These plants are known for their striking blue flowers.
Yes, Lithodora plants can make lovely additions to gardens. Their vibrant blue flowers add a splash of color to rock gardens, borders, or containers.
Lithodora diffusa (formerly known as L. prostrata), or Purple Gromwell, is commonly grown due to its striking blue flowers.
Lithodora plants are not typically known for their fragrance, but are loved for their vivid blue flowers.
Lithodora prefers full sun and well-drained, neutral to acidic soil. It's a great choice for rock gardens or cascading over walls.
Presently, Lithodora species are not considered invasive in the USA.
To remove Lithodora, dig out the plant ensuring all roots are removed to prevent regrowth. Persistent removal will be necessary as it can self-seed.
The Lithodora genus, a member of the Boraginaceae family, comprises evergreen perennials native to the Mediterranean region. Often used in rock gardens and borders, these plants are noted for their glossy, dark green leaves and brilliant blue flowers.
Lithodora prefers full sun and well-drained, acidic soil. Regular watering is essential for optimal growth. Propagation is typically done through cuttings, generally taken in the summer.
I hope that you enjoyed this guide on how to grow Lithodora plants. You may also enjoy the following Gardener's HQ growing guides: How to grow Heliotropium, Roscoea, and Onosma plants.