Growing lavender as a culinary herb
I grow lavender 'Munstead' in a raised bed on the south-facing side of my house in Melville, Long Island. It has been in the same spot for six years. The soil is sandy loam and drains fast, which suits lavender well. The thing I've come to understand about growing lavender for culinary use.
—- title: "Growing lavender as a culinary herb" slug: growing-lavender-herb hub: vegetables category: "Herb guide" description: "How to grow lavender for culinary use: which cultivars have the best flavor, harvest timing, drying, and avoiding the camphor problem in many ornamental varieties." date: 2026-06-10 updated: 2026-06-10 author: "Thomas A." reading_time: 9 scientific: "Lavandula angustifolia" zones_min: 5 zones_max: 8 sun: "full sun" —-
I grow lavender 'Munstead' in a raised bed on the south-facing side of my house in Melville, Long Island. It has been in the same spot for six years. The soil is sandy loam and drains fast, which suits lavender well. The thing I've come to understand about growing lavender for culinary use specifically is that cultivar selection matters more than most herb guides acknowledge. Not all lavenders taste good. Many taste of camphor and soap. The ones worth growing in the kitchen are a short list.
Which lavender is culinary-grade
Per NC State Extension, Lavandula angustifolia — true English lavender — has the lowest camphor content of the cultivated lavenders and is the species used in culinary applications. The culinary-grade cultivars with documented use:
- 'Munstead': Compact, 18-24 inches. Early bloomer. Good flavor balance — sweet with moderate floral intensity. My plant of six years.
- 'Hidcote': Compact, 12-20 inches. Deep purple flowers. Slightly more intense flavor than 'Munstead'.
- 'Vera': Taller, 24-30 inches. Considered the classic culinary cultivar in the UK. Less commonly available in American nurseries.
- 'Folgate': 18-24 inches. Good flavor; blooms slightly before 'Munstead'.
Lavandula x intermedia cultivars (lavandins) — including 'Grosso', 'Provence', 'Super', and 'Phenomenal' — are hybrids with L. latifolia. They are larger, more vigorous plants with high camphor content. Per Penn State Extension, lavandins are grown commercially for essential oil extraction, not culinary use. Using 'Grosso' in cooking is a common mistake that results in an unpleasant medicinal flavor.
USDA hardiness zones
Per NC State Extension, L. angustifolia is reliably hardy in USDA zones 5-8. In zone 5, plants benefit from 3-4 inches of gravel mulch around the crown to prevent frost heaving. In zones 9-10, lavender struggles with summer heat and humidity; grow it as a cool-season annual or choose L. dentata or heat-tolerant cultivars like 'Phenomenal' — though those are not culinary types.
In zone 7a (my location), 'Munstead' survives without any winter protection and has never died back significantly. That said, wet winters are more damaging than cold ones — the plant will rot before it freezes.
Light requirements
Per NC State Extension, lavender requires full sun — a minimum of 8 hours of direct sun per day for peak essential oil production and flower yield. Partial shade reduces oil content and flower density, and increases susceptibility to fungal disease. Do not plant where buildings, fences, or trees cast more than 2-3 hours of afternoon shade.
Soil requirements
Drainage is the single most important factor in lavender culture. Per Penn State Extension, lavender requires:
- Well-drained soil — will not tolerate standing water for more than a few hours
- pH 6.5-7.5 (tolerates slightly alkaline soil well)
- Low to moderate fertility — excess nitrogen promotes lush foliage at the expense of flowers and essential oil
In clay soils, per Penn State, raise beds 8-12 inches above grade and incorporate coarse gravel (1/4-inch grade) at 25-30% by volume to improve drainage. This is not optional. Lavender planted in clay without drainage improvement will decline within 2-3 years regardless of other care.
My Long Island sandy loam is close to ideal. The only amendment I added at planting was lime to bring the pH from 6.2 to 6.8.
Watering
Per NC State Extension, established lavender (2+ years) is drought tolerant. Water established plants only during extended dry periods — 3-4 weeks without rain. At my site, I water approximately 3 times per summer.
New transplants need consistent moisture for the first growing season: 1 inch per week. After the first winter, treat as drought tolerant.
Overwatering is the most common cause of lavender death, and the symptoms — gray foliage, declining vigor — can mimic drought stress, leading growers to water more and accelerate the problem.
Fertilizing
Per Penn State Extension, lavender grown in average garden soil needs little to no supplemental fertilizer. An annual top-dressing of lime (1/4 cup per plant) in early spring maintains the preferred pH range. If growth is noticeably slow, a single application of low-nitrogen fertilizer (5-10-10) at half the recommended rate in early spring is appropriate.
Do not fertilize with high-nitrogen fertilizers. Heavy nitrogen produces excessive vegetative growth that is susceptible to winter damage and disease.
Harvesting for culinary use
Timing is critical for flavor. Per Penn State Extension:
- Harvest when approximately one-third to one-half of the florets on each spike have opened
- Cut stems in the morning after dew has dried but before midday heat
- Cut back to just above the woody base — leave at least 2 sets of leaves on each stem
Flower buds harvested before opening retain the highest essential oil content. Fully open flowers have lower oil concentration and drop from stems more readily during drying.
Drying
Per NC State Extension, bundle 10-15 stems with a rubber band and hang upside down in a dark, well-ventilated space. Drying takes 1-2 weeks. Store dried buds in an airtight glass container away from light. Potency declines noticeably after 6-12 months.
Pruning for plant health
Per Penn State Extension, prune lavender twice per year:
- After bloom (June-July): Cut back by one-third to prevent the plant from becoming overly woody at the base
- Early spring (late March-April in zone 7): Light clean-up trim of any winter-damaged tips
Do not cut back into bare, woody stems. Per Penn State, lavender does not regenerate from old wood. If a plant has become a bare-centered woody shrub, it should be replaced rather than hard-pruned.
I made this mistake with a 'Hidcote' plant early on — cut too far back in the fall, and the following spring produced sparse regrowth from the outermost branches only.
Pests and diseases
Per NC State Extension:
Phytophthora root rot: The primary killer of lavender in humid-summer climates. Caused by poor drainage combined with heat. No fungicide cure once established; prevention through drainage is the only reliable management.
Botrytis (gray mold): Gray fuzzy growth on stems and flowers in cool, humid conditions. Per NC State, improve air circulation by pruning; avoid overhead irrigation.
**Spittlebug (Philaenus spumarius):** Foamy masses on stems in spring. Rarely damaging. Remove by hand or with a water jet.
**Lavender shab (Phoma lavandulae):** Dieback of stems starting at the tip. More common in humid climates. Remove affected stems and improve air circulation.
Common problems
| Symptom | Likely cause | Fix |
|---|---|---|
| Gray, declining foliage in summer | Root rot from overwatering or poor drainage | Improve drainage; reduce watering; replace severely affected plants |
| No flowers or sparse bloom | Insufficient sun or excess nitrogen | Confirm 8+ hours sun; stop fertilizing |
| Woody, bare center with weak perimeter | Age + insufficient pruning | Replace plant; prune annually after bloom |
| Plant survives summer but dies after winter | Frost heaving in clay soil | Raise bed; mulch with gravel (not wood chips) |
| Camphor taste in dried flowers | Wrong cultivar (lavandin) | Replace with L. angustifolia 'Munstead' or 'Hidcote' |
Frequently asked questions
Can I use any lavender in cooking? Per Penn State Extension, only Lavandula angustifolia cultivars are recommended for culinary use. L. x intermedia and other species have significantly higher camphor content, which produces a bitter, medicinal, or soapy flavor in food. Check the label when buying plants — if it says 'Grosso', 'Provence', or 'Phenomenal', it is a lavandin and not suitable for cooking.
When is the best time to plant lavender transplants? Per NC State Extension, plant in early spring (after the last hard frost) or early fall (6-8 weeks before the first fall frost). Fall planting allows root establishment before winter. Avoid planting in summer heat; transplant stress combined with high temperatures and humidity greatly increases root rot risk.
How long does lavender live? Per Penn State Extension, L. angustifolia plants are productive for 10-15 years in well-draining soil with proper pruning. Plants in heavy or wet soil typically decline within 3-5 years. My 'Munstead' plant, in its sixth year, is still vigorous and flowering heavily. The key has been leaving drainage alone and not over-pruning.
Does lavender spread and become invasive? Per NC State Extension, lavender is a well-behaved perennial that does not spread vegetatively — it stays in the clump. It self-seeds occasionally but not prolifically enough to be considered weedy. Propagate desirable cultivars by stem cuttings (3-4 inch soft or semi-hardwood cuttings in summer) rather than seed, because seed-grown plants are variable.
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Sources
- NC State Extension — Lavandula angustifolia
- Penn State Extension — Lavender production