Fringed lavender
Also known as
Toothed lavender, French lavender
Keep this plant’s care guide close at hand.
Get the appAbout Fringed lavender
Lavandula dentata is an evergreen, aromatic subshrub prized for its finely toothed, grey-green leaves and long season of lavender-purple blooms. Native to warm, coastal regions of the western Mediterranean and North Africa, it forms rounded mounds 45–90 cm tall and wide, with softly felted foliage that releases a sweet, resinous lavender scent when touched. Flowering spikes rise above the foliage from spring through autumn in mild climates, attracting bees, butterflies, and other pollinators. Compared with English lavender (L. angustifolia), L. dentata is less cold-hardy yet excels in heat, wind, and salt-laden air, making it ideal for dry gardens and seaside sites. It thrives in sharply drained, low-fertility, alkaline-leaning soils and is well suited to containers, gravel borders, and Mediterranean-style plantings. Regular deadheading encourages continued bloom and a compact habit. Indoors, it requires very bright light, excellent air movement, and careful watering to avoid root rot. With the right drainage and sun, this species is a durable, drought-tolerant ornamental.
Taxonomy
Properties & Requirements
How to care for Fringed lavender
Water
Allow the soil to dry well between waterings. In containers, water thoroughly when the top 2–3 inches (5–7 cm) are dry, then drain completely; do not leave standing water in saucers. In the ground, water weekly during the first growing season to establish, then reduce to deep irrigation every 10–14 days in hot, dry weather. In cool or humid periods and in winter, water sparingly. Consistently wet roots invite fungal problems; underwatering is far easier to correct than chronic overwatering.
Light
Provide full sun for peak flowering and compact growth—at least 6–8 hours of direct light daily outdoors. Indoors, place at a south or west window with no shading, or supplement with bright grow lights positioned close enough to deliver high intensity. Insufficient light leads to lanky stems and sparse blooms. High light combined with freely draining soil allows deeper, safer watering cycles and reduces disease pressure.
Nutrients
Feed sparingly. Lavender prefers lean soils; excessive nitrogen produces lush, weak growth and fewer flowers. In spring, mix a small amount of low‑nitrogen, slow‑release fertilizer or a light top-dressing of compost into the root zone. For containers, use a dilute, balanced feed (e.g., 3‑1‑2 or 5‑5‑5) at quarter strength once monthly in active growth, then stop by late summer. Maintain alkaline-leaning conditions with a pinch of dolomitic lime if pH trends acidic.
Temperature
Best in mild, warm conditions: 60–80°F (15–27°C) with good air flow. Lavandula dentata tolerates heat and wind but is only lightly frost-hardy. Protect from sustained freezes; brief dips to about 25°F (−4°C) may damage foliage and buds. Grow outdoors year-round in USDA zones 9–11; in cooler zones, overwinter in a bright, cool room above 40°F (4–5°C). Avoid warm, dim indoor locations in winter, which promote weak, leggy growth and disease.
