Lupinus arboreus f. caerulus is a shrub endemic to the coastal dunes of California and is appreciated for its attractive arching habit and long spring flowering of lilac blue blooms on short spikes. Fragrant.
This lupin is superb planted on its own in a rock garden and rapidly matures to adulthood and can live up to seven years. Grey green foliage all year round in mild climates. Height: 120 to 150 cm
For a rock garden, seaside garden, rockfill, stony beds.
Grow in the sun in poor, light, sandy, deep soil. Hardiness: -12°C
- Prune to shape at the end of winter.
- Trim the dried inflorescences.
- Apply a bracken mulch in harsh climates. May re-seed.
(*) Lupinus arboreus is a member of the Fabaceae or pea family and is a vigorous grower (even in poor soil). Deep soil and a tap root system ensure that it is well rooted.
Note on the photo: Lupinus arboreus f. caeruleus in the botanical garden of the University of Berkeley, California, USA.
- 1 litre pot
- Hardiness zones : zone 8-10
- Height: 130 to 150cm
- Plant spacing: 60 cm
- Flower colour: blue
- Flowering period: summer flowers