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French Lavender

Lavandula dentata

Distinguished by its unique serrated leaves and topped flower spikes crowned with purple bracts, French lavender brings year-round beauty to warm climate gardens. This aromatic herb blooms almost continuously in mild climates and offers a slightly camphor-like fragrance that's perfect for crafts and cooking. More heat and humidity tolerant than English lavender, making it ideal for challenging growing conditions.

Harvest

90-120d

Days to harvest

📅

Sun

Full sun to partial shade

☀️

Zones

5–9

USDA hardiness

🗺️

Height

1-3 feet

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Planting Timeline

Zone:

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Start Indoors

Transplant

Harvest

Start Indoors

Transplant

Harvest

Showing dates for French Lavender in USDA Zone 7

All Zone 7 herb →

Zone Map

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French Lavender · Zones 5–9

What grows well in Zone 7? →

Growing Details

Difficulty

Easy to moderate

Spacing24-30 inches

SoilSandy, well-draining soil with excellent drainage

pH6.5-7.5

WaterLow to moderate, drought tolerant once established

SeasonPerennial in warm climates, annual in cold regions

FlavorFloral, slightly camphor-like with pine undertones

ColorGray-green serrated foliage with purple flower spikes

SizeMedium-sized compact shrub

Zone-by-Zone Planting Calendar

Zone	Indoor Start	Transplant	Direct Sow	Harvest
Zone 5	March – April	May – June	—	June – October
Zone 6	March – April	May – June	—	June – November
Zone 7	February – March	April – June	—	June – November
Zone 8	February – March	April – May	—	May – December
Zone 9	January – February	March – April	—	April – December

Complete Growing Guide

Light: Full sun (6 or more hours of direct sunlight a day), Partial Shade (Direct sunlight only part of the day, 2-6 hours). Soil: Loam (Silt), Sand, Shallow Rocky. Soil pH: Alkaline (>8.0), Neutral (6.0-8.0). Drainage: Good Drainage, Occasionally Dry. Height: 1 ft. 0 in. - 3 ft. 0 in.. Spread: 1 ft. 0 in. - 2 ft. 0 in.. Spacing: 12 inches-3 feet. Growth rate: Medium. Maintenance: Medium. Regions: Mountains, Piedmont.

Harvesting

Fruits are non-ornamental dry capsules.

Type: Capsule.

Harvest time: Fall

Edibility: Teas can be made from the plant or used as a spice

Storage & Preservation

Fresh French lavender stems last 7-10 days when placed in water like cut flowers, though the fragrance is best within the first 3-4 days. For culinary use, strip flowers immediately and store in airtight containers in the refrigerator for up to one week.

Drying is the preferred preservation method—bundle 10-15 stems with rubber bands and hang upside down in a dark, well-ventilated area for 2-3 weeks. Properly dried flowers retain their purple color and strong fragrance for up to two years when stored in sealed glass jars away from light.

Freeze-drying preserves the most fragrance: strip fresh flowers and freeze in single layers on baking sheets, then transfer to freezer bags for up to one year. French lavender also makes excellent infused oils—submerge fresh flowers in carrier oil and let sit for 4-6 weeks, straining before use.

History & Origin

Lavandula dentata, commonly known as French lavender, originates from the Mediterranean region, particularly Spain and Portugal, where it grows wild in warm, arid climates. Unlike English lavender, which was extensively cultivated and documented through British horticultural traditions, the specific breeding history and formal introduction date of French lavender remain poorly documented in accessible horticultural records. The variety likely developed through centuries of natural selection and informal cultivation in Mediterranean communities rather than deliberate breeding programs. Its distinction as a separate cultivar became more formalized during the twentieth century as seed companies and gardeners recognized its superior heat and humidity tolerance compared to other lavender species, though comprehensive documentation of its exact origin and early cultivation remains sparse.

Origin: Europe

Advantages

+Attracts: Pollinators
+Edible: Teas can be made from the plant or used as a spice

Companion Plants

Lavender's most natural neighbors are the other Mediterranean herbs — rosemary, thyme, oregano, and sage. They want the same things: full sun, lean soil, sharp drainage, and a pH around 6.5–7.5. Put them in the same bed and you're not constantly fighting yourself over watering schedules or fertility. NC State Extension points out that Mediterranean herbs grown with good air circulation and drainage rarely deal with serious pest or disease pressure, and that's even more true when you group plants with identical cultural needs. Packing unrelated plant families together also disrupts pest buildup — a pest that specializes in one crop hits a wall when the next plant in line belongs to a different family entirely.

Marigolds (Tagetes spp.) and alliums are useful additions for a different reason. Both have a reputation for reducing soft-bodied insect pressure nearby, and since aphids are lavender's most common pest visitor, that's a reasonable pairing to try. Roses also do well planted within a few feet of lavender — some growers see less aphid activity on the roses, likely because the habitat diversity makes it harder for a colony to establish and spread.

Mint is a genuine problem, not just an incompatibility. It spreads through underground runners and will physically crowd lavender out within a season or two; it also demands consistent moisture that lavender's roots can't tolerate without rot setting in. Impatiens are a similar mismatch — they're bred for shade and wet soil, conditions that are essentially the opposite of what Lavandula dentata needs. One of the two plants will always be wrong, and it won't be the impatiens.

Plant Together

Rosemary

Similar water and soil requirements, both repel pests like moths and beetles

Thyme

Compatible Mediterranean herb with similar growing conditions, attracts beneficial pollinators

Oregano

Shares drought tolerance and well-draining soil needs, repels harmful insects

Sage

Both prefer alkaline soil and full sun, sage deters cabbage moths and carrot flies

Marigolds

Repel nematodes and aphids while attracting beneficial insects to the garden

Alliums

Natural pest deterrent that repels aphids, spider mites, and cabbage worms

Roses

Lavender repels aphids and ants that commonly attack roses

Cabbage

Lavender deters cabbage moths, flea beetles, and other brassica pests

Keep Apart

Mint

Aggressive spreader that competes for space and has different water requirements

Impatiens

Requires frequent watering and rich, moist soil that lavender cannot tolerate

Camellias

Acid-loving plants that prefer moist, rich soil opposite to lavender's alkaline, dry conditions

Nutrition Facts

Calories

23kcal(1%)

Protein

3.15g(6%)

Fiber

1.6g(6%)

Carbs

2.65g(1%)

Fat

0.64g(1%)

Vitamin C

18mg(20%)

Vitamin A

264mcg(29%)

Vitamin K

415mcg(346%)

Iron

3.17mg(18%)

Calcium

177mg(14%)

Potassium

295mg(6%)

Per 100g serving. % Daily Value based on 2,000 calorie diet. Source: USDA FoodData Central (FDC #172232)

Pests & Disease Resistance

Resistance

Generally disease resistant, susceptible to root rot in wet conditions

Common Pests

Aphids, spittlebugs, whiteflies

Diseases

Root rot, fungal issues in humid conditions

Troubleshooting French Lavender

What you'll see, why it happens, and what to do about it.

Stems and crowns turning brown and mushy at soil level, often after a wet stretch

Likely Causes

Root rot — typically Phytophthora or Pythium spp. — triggered by waterlogged or poorly drained soil
Planting in heavy clay without amendment, which holds moisture around the crown

What to Do

1.Dig the plant and check the roots; brown and slimy rather than white and firm means rot — cut away all affected material and replant in a raised bed or mounded row with gritty, well-drained soil
2.Work coarse sand or perlite into the planting hole before transplanting to keep water moving through
3.Back off irrigation entirely once the plant is established — lavender handles drought well and suffers far more from overwatering than from drying out

Sticky, distorted new growth with small clusters of soft-bodied insects on shoot tips

Likely Causes

Aphid infestation — several species feed on lavender, including the green peach aphid (Myzus persicae)
Overfertilizing with nitrogen, which produces the lush soft growth aphids prefer

What to Do

1.Blast shoot tips with a strong stream of water every 2–3 days until populations drop — most aphids don't climb back
2.Apply insecticidal soap directly to affected growth for severe outbreaks; NC State Extension notes it's effective against aphids on herbs without the residue concerns of traditional pesticides
3.Hold off on high-nitrogen fertilizer — lavender is a lean feeder and pushing it with nitrogen makes aphid pressure worse, not better

White, frothy blobs on stems in early summer, plant looking generally sluggish

Likely Causes

Spittlebugs (Philaenus spumarius) — the nymph hides inside that foam while feeding on plant sap
Dense, poorly ventilated plantings that stay humid longer in the morning

What to Do

1.Wipe or rinse the spittle masses off by hand or with a hose — the nymphs are soft-bodied and don't survive being dislodged
2.Space plants at least 24–30 inches apart to open up airflow and reduce the humid pockets spittlebugs prefer
3.Check neighboring weeds and ornamental grasses, which often carry spittlebug populations that move onto garden plants

Frequently Asked Questions

What's the difference between French lavender and English lavender?▼

French lavender has distinctive serrated leaves and topped flower spikes with purple 'rabbit ear' bracts, while English lavender has smooth leaves and simple flower spikes. French lavender is more heat tolerant but less cold hardy, surviving only to zone 7 versus zone 5 for English lavender. The fragrance is also different—French lavender has a camphor-like scent while English lavender is sweeter.

Can you grow French lavender in containers?▼

Yes, French lavender is excellent for container growing due to its compact size and drought tolerance. Use a pot at least 12-16 inches wide with drainage holes, and fill with well-draining potting mix amended with perlite. Water only when the top 2 inches of soil feel dry, and move containers to protected areas in zones 7-8 during winter.

How long does French lavender take to bloom from seed?▼

French lavender typically takes 90-120 days from seed to first bloom, but germination is slow and irregular. Seeds started indoors in late winter will usually produce flowering plants by mid to late summer. For faster results, many gardeners prefer propagating from cuttings, which can bloom within 6-8 weeks of rooting.

Is French lavender good for cooking like English lavender?▼

French lavender can be used in cooking but sparingly due to its strong camphor flavor. It works well in herbes de Provence blends and pairs with robust dishes like roasted meats. However, English lavender is preferred for delicate baking and desserts. Start with very small amounts of French lavender—about half what you'd use of English lavender.

Why isn't my French lavender blooming?▼

French lavender needs full sun (6-8 hours daily) and well-draining soil to bloom properly. Common causes of poor flowering include too much shade, overwatering, over-fertilizing with nitrogen, or pruning too late in the season. Ensure plants get morning sun, water only when soil is dry, and avoid fertilizing after early spring.

When should I prune French lavender?▼

Prune French lavender immediately after each flush of blooms throughout the growing season, cutting back about one-third of the plant. Make cuts just above new growth nodes and never cut into old woody stems. In late fall, give a light trim but avoid heavy pruning before winter, especially in zones 7-8 where plants need foliage for cold protection.