The “Carmel Plant” often refers to Ceanothus ‘Concha’, an evergreen shrub known for its vibrant blue blooms. Also called California Lilac ‘Concha’, it is a popular choice for gardeners due to its striking appearance and low maintenance. Its adaptability and beauty make it widely used in suitable climates.
Identifying the Carmel Plant
Ceanothus ‘Concha’ is a dense, evergreen shrub with a mounding and arching growth habit. It typically reaches 4 to 8 feet tall and spreads 6 to 12 feet wide, with larger sizes possible in milder climates. Its foliage consists of small, narrow, dark green leaves, about 1 inch long, that are glossy and often have a slightly wrinkled texture. The most striking feature is its profusion of deep blue to cobalt-blue flowers, emerging from reddish-purple buds in late spring and early summer. These vibrant flower clusters can completely cover the shrub, creating a spectacular display.
Beyond its beauty, Ceanothus ‘Concha’ attracts pollinators like bees, butterflies, and hummingbirds, contributing to garden biodiversity. Once established, it is drought-tolerant, making it a sustainable choice for water-wise landscapes. It is also unattractive to deer.
Ideal Growing Conditions
Ceanothus ‘Concha’ thrives in full sun, which encourages abundant flowering. It can tolerate some afternoon shade, especially in hotter regions. A sheltered position also benefits its growth.
The Carmel Plant requires well-drained soil and adapts to various soil types, including clay, loam, and sandy soils. While it tolerates different soil pH levels, from neutral to alkaline, excellent drainage is paramount to prevent root issues. This plant is well-suited to Mediterranean climates, mimicking its native Californian habitat. It is generally hardy in USDA Zones 7 to 10, tolerating temperatures down to about 10-20°F (-12 to -6°C).
Planting and Ongoing Care
The optimal time to plant Ceanothus ‘Concha’ is typically late fall through early winter, allowing the root system to establish during cooler, wetter months. When planting, dig a hole twice the width of the rootball but only as deep as the rootball itself. Place the plant slightly higher than the surrounding soil grade and backfill with native soil, gently firming it around the base without adding amendments or fertilizers.
Water regularly after planting until the root system is established. Once established, Ceanothus ‘Concha’ is remarkably drought-tolerant, requiring minimal supplemental summer watering. Overwatering, especially in poorly drained soils, can lead to root rot. Deep watering every 3-4 weeks after establishment is often sufficient, adjusted for rainfall and soil moisture.
Pruning should be light and primarily done in early spring after flowering to maintain shape and encourage dense growth. Avoid heavy pruning or cutting into old, woody stems, as this plant does not respond well to severe cuts and can be susceptible to fungal infections. Minimal fertilization is generally needed, as Ceanothus species can fix nitrogen, improving soil quality naturally. While generally robust, watch for occasional issues such as scale insects and root rot, particularly if drainage is inadequate. Ensuring proper drainage and avoiding overwatering are the most effective preventative measures.