Lavender Hedge Guide: Spacing, Varieties and the Annual Cut-Back Timing That Keeps It Dense for 10+ Years
Everything you need to create a thriving lavender hedge: the best varieties for hedging, correct spacing, planting method, pruning schedule, and how to keep it dense and flowering for years.
A lavender hedge does something that most flowering hedges cannot: it delivers colour, fragrance, texture, and wildlife value all at once, from a plant that actively prefers poor soil and minimal fuss. Get the variety choice and pruning right and a lavender hedge will thrive for fifteen years or more, filling the garden with scent from June through August and attracting bees from the moment the first spike opens.
This guide covers everything you need from first planning through to long-term maintenance: which varieties actually work as a hedge, how to prepare the ground, planting distances, first-year care, the all-important annual pruning schedule, and how to renovate a hedge that has gone woody and bare. For the full picture of growing lavender in your garden, see our complete lavender growing guide.
Which Lavender Varieties Make the Best Hedge?
Not all lavender works as a hedge. The key criteria are: a naturally mounded, compact growth habit; good stem rigidity (so plants don’t flop after rain); reliable repeat or extended flowering; and, in colder climates, genuine cold hardiness. Three species dominate the hedging shortlist.
English Lavender (Lavandula angustifolia)
The gold standard for hardy lavender hedges in USDA zones 5 through 8. English lavender is the most cold-tolerant species and the most amenable to regular pruning. Key hedging cultivars:
Seasonal Garden Calendar
Know exactly what to plant, prune and sow — every month of the year.
- ‘Hidcote’ — The single most widely planted hedging lavender. Compact to 18 inches, very dark purple, reliably bushy. Handles a hard annual clip better than almost any other variety.
- ‘Munstead’ — Slightly shorter than Hidcote (12 to 15 inches), earlier to flower, slightly lighter blue-purple. A good choice where you want a lower, softer-looking hedge.
- ‘Vera’ — Larger growing (to 24 inches), used where a taller hedge is needed. Strong upright habit but requires more rigorous pruning to stay dense.
Lavandin (Lavandula x intermedia)
A hybrid of English lavender and spike lavender. Lavandin grows larger (24 to 36 inches) and flowers later and more abundantly than English lavender, but is slightly less winter-hardy (reliable to zone 6). Best hedging lavandin cultivars:
- ‘Grosso’ — The commercial oil-crop standard. Dense, long-stemmed, very fragrant, excellent structural hedge once established.
- ‘Phenomenal’ — Bred for improved cold tolerance and disease resistance. Upright mounded habit, performs well in humid summers where other lavenders struggle.
- ‘Provence’ — Looser habit than Grosso, very fragrant, slightly silvery foliage. Beautiful as a relaxed cottage-style hedge.
French Lavender (Lavandula stoechas)
French lavender, with its distinctive butterfly-like bracts, is only suitable for hedging in frost-free climates (zones 8 through 10) or where it will be treated as an annual. It flowers earlier than English lavender but cannot tolerate prolonged frost. In warm climates it makes an outstanding informal hedge that blooms almost year-round.
For a direct comparison of the species and how to choose between them, see our lavender problems guide, which covers the growing failures that affect each type differently.
| Variety | Height | Zones | Best for |
|---|---|---|---|
| ‘Hidcote’ | 15-18 in | 5-8 | Classic formal hedge |
| ‘Munstead’ | 12-15 in | 5-8 | Low border hedge |
| ‘Grosso’ lavandin | 24-36 in | 6-9 | Taller structural hedge |
| ‘Phenomenal’ lavandin | 24-30 in | 5-9 | Humid climates |
| French lavender | 18-24 in | 8-10 | Warm-climate hedge |
Choosing the Right Site
Lavender is uncompromising about two things: sun and drainage. Get both right and almost everything else is forgiving. Get either wrong and no amount of care will save the hedge.
Sun: Lavender needs a minimum of six hours of direct sun per day. Eight hours is better. A south- or west-facing location is ideal in the Northern Hemisphere. Partial shade produces leggy, sparse growth, fewer flowers, and greatly increased susceptibility to root rot.
Drainage: This is the number-one reason lavender hedges fail. Lavender has evolved in the thin, alkaline, free-draining soils of the Mediterranean basin. Its roots will rot in any soil that holds water over winter. If your soil is clay or heavy loam, you must improve it before planting — see Soil Preparation below.
Air circulation: Good airflow around the plants reduces the incidence of fungal problems, particularly in humid climates. Avoid planting lavender where it will be enclosed on multiple sides by walls or tall plants that restrict air movement.
pH: Lavender prefers slightly alkaline to neutral soil, pH 6.5 to 7.5. The University of California Cooperative Extension notes that adding lime to acidic soils (below 6.0) can significantly improve lavender performance in maritime climates. [1]
Soil Preparation
Unlike most flowering shrubs, lavender does not benefit from rich, organic-amended soil. Fertilising the ground or digging in large quantities of compost before planting will produce lush, soft growth that is susceptible to frost damage, disease, and collapse. The goal is lean and sharp-draining.
See also our guide to anthurium care guide.
For most garden soils, the preparation is:
- Remove weeds thoroughly — lavender does not compete well with established weeds in its first year.
- If soil is clay or compacted: incorporate horticultural grit (at least 20% by volume) to a depth of 12 inches. On seriously waterlogged sites, consider raising the bed by 6 to 8 inches.
- If soil is very acidic (below 6.0): apply ground limestone at 4 to 6 oz per square yard and dig in lightly.
- Do not apply fertiliser, compost, or manure. Lavender in over-enriched soil grows too fast, produces less-fragrant foliage, and is more likely to split or die in winter.
The RHS recommends a free-draining, gritty compost as a growing medium for container lavender, and the same principle applies in open ground: lean, mineral-rich, fast-draining. [2]
How to Plant a Lavender Hedge
When to Plant
The best time to plant a lavender hedge depends on your climate:
- Spring (March to May): The safest option in zones 5 through 7. Plants establish through summer and have a full growing season before their first winter.
- Fall (September to October): Works well in zones 7 through 10, where winters are mild. Avoid fall planting in cold climates — young lavender plants are vulnerable to frost heave in their first winter.
- Avoid midsummer planting in hot climates: heat stress on newly planted lavender is a leading cause of first-year losses.
Spacing
Spacing determines both the time to fill in as a hedge and the long-term air circulation between plants. Recommended spacings:
- English lavender (‘Hidcote’, ‘Munstead’): 12 to 18 inches apart
- Lavandin cultivars (‘Grosso’, ‘Phenomenal’): 18 to 24 inches apart
- French lavender: 18 inches apart
Closer spacing gives a faster-filling hedge but increases disease pressure over time. Plants at the wider end of these ranges will take one additional season to merge but will have better long-term air circulation and less competition for nutrients and water.
Planting Method
- Water container plants thoroughly an hour before planting.
- Dig a hole only as deep as the root ball — no deeper. Planting too deep is a common mistake that causes stem rot at the crown.
- Tease out any circling roots gently before placing the plant.
- Set the plant so the crown (the point where stems meet roots) is exactly at soil level — never buried.
- Firm in and water well. Do not mulch up against the crown — this retains moisture and promotes rot. A mulch of gravel or grit around (not touching) the plants helps suppress weeds and reflect heat back onto the foliage.
- If planting in spring, pinch back any flower buds in the first year. Allowing newly planted lavender to flower diverts energy from root establishment.
First-Year Care
The first growing season is when most lavender hedge failures occur. The plants look established but are still developing the root systems they need to survive drought and winter.
Watering: Water new plants every 7 to 10 days in the absence of rain throughout the first summer. Once established (typically by the end of year two), lavender is highly drought-tolerant and should be watered only during extended dry spells. Over-watering established lavender is a more common problem than under-watering.
Feeding: Do not fertilise in the first year. One light application of a low-nitrogen fertiliser (such as a tomato fertiliser or bone meal) in early spring of year two is sufficient for most garden soils. Nitrogen encourages leafy growth at the expense of fragrance and flowering.
Weeding: Keep the planting zone weed-free through the first growing season. Lavender is not competitive in its first year and will be suppressed by vigorous weeds.
First pruning: In late summer of the first year, lightly trim back any faded flower stalks. Do not cut hard in the first season — save any structural pruning for year two onward.
Pruning: The Most Important Skill
More lavender hedges are killed or ruined by incorrect pruning than by any other single factor. The two rules that govern all lavender pruning are:
- Always leave green growth. Lavender will not regenerate from bare old wood. If you cut back into the grey, woody base, the plant will die or produce only weak regrowth at best.
- Prune every year. A lavender hedge that is not pruned annually will become open, woody, and prone to splitting within three to four years. There is no recovering a fully woody lavender except by replacement.
When to Prune
- Main prune: Immediately after the first flowering flush, typically late July to mid-August in most of the US. Cut back the spent flower stalks and approximately one-third of the current season’s green growth. This is the most important annual task.
- Light spring tidy: In early spring (April in zones 5 to 7), remove any frost-damaged tips and lightly shape the hedge. Do not cut hard in spring.
How to Prune
Use sharp hedge shears or hand pruners — blunt blades crush rather than cut and increase disease entry points. Cut back to just above the point where green leafy growth begins on the stem, typically leaving 3 to 4 inches of green growth above the woody base. The goal is a rounded mound shape, slightly wider at the base than the top, which gives each plant maximum light and airflow.
A study at the University of Massachusetts Amherst on lavender crop maintenance found that annual pruning extending into the lower green zone of the plant significantly extended productive lifespan compared to tip-only trimming, which allows plants to become top-heavy and collapse. [3]
Renovation Pruning
If you’ve inherited or neglected a woody lavender hedge, some recovery may be possible — but it requires a realistic assessment. If at least 30% of the stem length still shows green leafy growth, cut back to just above the lowest green bud, hard and clean. Do this in early spring, not after flowering. The hedge may take two seasons to recover full density.
If plants are entirely woody with no green growth below the old cut points, they cannot be renovated. Replacement is the only option.
Ongoing Maintenance Calendar
| Month | Task |
|---|---|
| March-April | Light spring tidy; remove frost-damaged tips; apply light balanced feed if soil is poor |
| May-June | Enjoy flowering; minimal intervention needed |
| July-August | Main prune immediately after flowering; cut back one-third of green growth |
| September | Check for any splits or gaps; remove dead plants promptly |
| October-November | In zones 5-6: apply light mulch of grit around bases before hard frost |
| December-February | No action needed; avoid cutting in cold weather |
Common Problems and How to Fix Them
| Problem | Cause | Fix |
|---|---|---|
| Plants dying in winter | Waterlogged soil or crown rot from over-mulching | Improve drainage before replanting; mulch with grit not bark |
| Leggy, sparse hedge | Insufficient pruning or too much shade | Hard prune in late summer; assess light levels |
| Woody and splitting plants | Skipped annual pruning for 2+ years | Attempt renovation prune in spring; replace if fully woody |
| Poor flowering | Too much nitrogen, not enough sun | Stop feeding; ensure 6+ hours sun |
| Grey/silver foliage discolouring | Normal — this is the foliage colour | No action needed |
| Shab disease (Phoma lavandulae) | Fungal infection, common in humid climates | Remove affected stems to healthy wood; improve airflow |
For a comprehensive guide to diagnosing and treating lavender diseases and pests, see our lavender problems guide.
Frequently Asked Questions
What is the best lavender for a hedge?
‘Hidcote’ English lavender is the most widely recommended hedging variety for North American gardens. It has a naturally compact, mounded habit, very dark purple flowers, and responds well to annual pruning. For a taller hedge or in zone 6 and warmer, ‘Phenomenal’ lavandin is an excellent choice with superior disease resistance.
How far apart should I plant lavender for a hedge?
Space English lavender varieties 12 to 18 inches apart. Larger lavandin cultivars should be spaced 18 to 24 inches apart. Plants will close the gaps within two to three growing seasons. Closer spacing speeds fill-in but reduces airflow and increases fungal disease pressure over time.
How do I keep a lavender hedge from going woody?
Prune immediately after flowering every single year without exception, removing up to one-third of the current season’s green growth. Never skip a year. Annual pruning is the single most effective way to prevent the woody base from advancing up the plant and is the primary factor separating long-lived productive hedges from ones that collapse at five years.
Can I cut lavender back hard to rejuvenate it?
Only if there is still green growth in the lower portion of the plant. Lavender cannot regenerate from bare old wood — if you cut into the grey woody base with no green growth present, the plant will die. If at least 30% of the stem length carries green leaves, a renovation prune in early spring may work, but success is not guaranteed and two seasons of recovery should be expected.
When is the best time to plant a lavender hedge?
Spring (March to May) in zones 5 through 7; fall (September to October) in zones 7 through 10. Avoid midsummer planting in hot climates — heat stress on newly planted lavender significantly increases failure rates.
Sources
- University of California Cooperative Extension. Lavender Production in California. UC ANR Publication 7480. Accessed March 2026.
- Royal Horticultural Society. Lavender — RHS Grow Your Own. rhs.org.uk. Accessed March 2026.
- University of Massachusetts Amherst Extension. Lavender Production for the 21st Century. umass.edu. Accessed March 2026.
