French Lavender
Lavandula stoechas
French Lavender (Lavandula stoechas) is a fragrant and colorful addition to gardens, known for its unique flower spikes and aromatic foliage. Native to the Mediterranean, this hardy perennial thrives in sunny locations and well-draining soil, making it a favorite among gardeners for its beauty and resilience.
Everything it needs
9 essentials at a glance
Watering
French Lavender prefers well-draining soil and should be watered deeply but infrequently.
Water every 2-3 weeks during the growing season, allowing the top inch of soil to dry out between waterings. In winter, reduce watering to once a month. Signs of over-watering include yellowing leaves and root rot, while under-watering may cause wilting and browning of leaf tips.
Light
French Lavender thrives in full sun, requiring at least 6-8 hours of direct sunlight daily.
Ideal placement includes south or west-facing gardens or windowsills. It can tolerate partial shade but may produce fewer flowers and have a leggy appearance in low light conditions.
Soil
The ideal soil composition for French Lavender is sandy or loamy soil with a pH range of 6.0 to 8.0.
It requires excellent drainage to prevent root rot, so a potting mix designed for cacti or succulents is recommended, or you can amend regular potting soil with sand or perlite.
Humidity
French Lavender prefers low to moderate humidity levels, ideally between 30-50%.
To increase humidity, mist the plant occasionally or use a humidity tray. Signs of humidity stress include browning leaf tips and wilting.
Temperature
The ideal temperature range for French Lavender is 60-75°F (15-24°C).
It is hardy in zones 8-10 and can tolerate brief periods of cold down to 20°F (-6°C). In summer, it can withstand higher temperatures but should be protected from extreme heat.
Fertilizing
Use a balanced fertilizer with an NPK ratio of 10-10-10 or a low-nitrogen fertilizer.
Fertilize every 4-6 weeks during the growing season, and avoid fertilizing in winter. Signs of nutrient deficiency include stunted growth and pale leaves.
Pruning
Prune French Lavender after flowering in late summer to maintain shape and encourage bushier growth.
Use sharp, clean shears to cut back about one-third of the plant, avoiding cutting into the woody stems. Deadheading spent flowers can also promote additional blooms.
Repotting
Repot French Lavender every 2-3 years or when it becomes root-bound.
Choose a pot that is 1-2 inches larger in diameter. Signs it needs repotting include roots growing out of the drainage holes and stunted growth. To repot, gently remove the plant from its current pot, loosen any tightly bound roots, and place it in fresh potting mix.
Propagation
French Lavender can be propagated through stem cuttings or seeds.
For stem cuttings, take 4-6 inch cuttings from healthy stems in late spring, remove the lower leaves, and place them in a well-draining potting mix. Keep the soil moist and in bright light until roots develop, which usually takes 3-4 weeks. For seeds, sow in spring after the last frost, covering lightly with soil.
When it's unhappy
Yellow leaves
Why it happens
Over-watering or poor drainage.
How to fix it
Ensure the pot has drainage holes and reduce watering frequency.
Wilting
Why it happens
Under-watering or high heat.
How to fix it
Check soil moisture and water thoroughly if dry.
Root rot
Why it happens
Excess moisture and poor drainage.
How to fix it
Repot in fresh, well-draining soil and reduce watering.
Leggy growth
Why it happens
Insufficient light.
How to fix it
Move the plant to a sunnier location to encourage compact growth.
Pest infestations (e.g., aphids)
Why it happens
Weak plants or overcrowding.
How to fix it
Use insecticidal soap or neem oil to treat affected areas.
Care through the year
Spring
In spring, resume regular watering and fertilizing as the plant begins to grow. Prune any dead or damaged stems to encourage new growth.
Summer
During summer, ensure the plant receives full sun and monitor for pests. Water deeply but infrequently, allowing the soil to dry out between waterings.
Fall
In fall, reduce watering as the plant prepares for dormancy. Remove any spent flowers and consider a light pruning to maintain shape.
Winter
In winter, water sparingly and protect the plant from frost. If grown indoors, place it in a bright location and maintain lower humidity.
Toxicity & Safety
French Lavender is generally considered non-toxic to pets and children. However, ingestion of large quantities may cause mild gastrointestinal upset. The essential oils can be irritating to sensitive skin.
Good to know
Why are my French Lavender leaves turning yellow?
Yellow leaves on French Lavender are often a sign of over-watering or poor drainage. Ensure the soil dries out between waterings and check for drainage holes in the pot.
How often should I water my French Lavender?
Water French Lavender every 2-3 weeks during the growing season, allowing the top inch of soil to dry out completely before watering again.
What type of soil is best for French Lavender?
French Lavender thrives in sandy or loamy soil with excellent drainage. A potting mix designed for cacti or succulents is ideal.
How do I propagate French Lavender?
You can propagate French Lavender through stem cuttings or seeds. For cuttings, take healthy stems in late spring, place them in well-draining soil, and keep moist until roots develop.
When should I prune my French Lavender?
Prune French Lavender after flowering in late summer to maintain its shape and promote bushier growth. Cut back about one-third of the plant.
What pests affect French Lavender?
Common pests include aphids and spider mites. Regularly inspect your plant and treat infestations with insecticidal soap or neem oil.
Can French Lavender survive winter?
French Lavender is hardy in zones 8-10 and can tolerate brief cold spells. In colder areas, protect it from frost and consider bringing it indoors.
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