How to Grow Elephant Garlic UK
On this page
- Elephant Garlic (Allium ampeloprasum var. ampeloprasum)
- Regional Planting Calendar
- Quick Facts
- At a Glance
- Soil & Growing Conditions
- Growth Stages
- Harvest & Storage
- Diseases
- Pests
- Companion Planting
- Elephant Garlic, Clove to Harvest
- Plan your Elephant Garlic planting
- Growing Elephant Garlic in another region
- References
- Frequently Asked Questions
In the UK, elephant garlic goes in the ground early October to late November, and is ready to harvest 180–240 days after planting.
Timing is the decision that matters most in the UK: there are 4 separate regional sowing windows, ranging from mid September in Scotland to early October in Midlands.
The short answer
- Plant
- Early October to late November
- Ready in
- 180–240 days
- Site
- soil pH 6–6.5
- Biggest risk
- Allium white rot
Core growing advice on this page is checked against named horticultural sources — see References.
Elephant Garlic (Allium ampeloprasum var. ampeloprasum)
14 sources cited · Verified
Regional Planting Calendar
| Region | Sow |
|---|---|
| Southern England | early October to late November |
| Midlands derived | early October to mid November |
| Northern England derived | late September to early November |
| Scotland derived | mid September to late October |
Rows marked derived are interpolated between regions our sources do state, because no source we consulted gives a figure for that region specifically. They are deliberately wider to reflect that uncertainty.
Southern England - detail & sources
Plant elephant garlic cloves in autumn - RHS says it is "best planted in October" - so it gets the winter cold it needs; mild southern gardens can plant on into late autumn. Cloves are lifted the following summer once the leaves yellow. Spring planting is possible but gives smaller bulbs.
Midlands - detail & sources
DERIVED: as in the south, plant cloves in October, but finish a little sooner than the mildest areas so plants establish before winter (Met Office south-to-north gradient).
Northern England - detail & sources
DERIVED: plant from late September into October, a little earlier than the south, so cloves root well before hard frosts arrive (Met Office south-to-north gradient). Fully hardy (H6), elephant garlic overwinters well in the north.
Scotland - detail & sources
DERIVED: plant the earliest of all, from mid-September to late October, as Scotland cools soonest (Met Office); good drainage matters most here, as elephant garlic dislikes cold, wet winter ground - grow in containers on heavy soil.
Quick Facts
| Factor | Value |
|---|---|
| Soil pH | 6 - 6.5 |
| Optimal growing temp | 18-24°C |
| Minimum survivable temp | -5°C |
| Time to harvest | 180-240 days |
| Drainage | Chalk, Clay, Loam, Sand; moist but well-drained or well-drained; avoid heavy clay prone to winter saturation (grow in containers if so) |
| Lifecycle | Herbaceous perennial grown as a biennial-style crop: cloves are planted in autumn, overwinter (they need a cold period), and are harvested the following summer. Fully frost-hardy (H6); very often left to flower and to form offsets if not lifted. |
| Edible parts | bulb (cloves) |
At a Glance
Soil & Growing Conditions
Growth Stages
| Stage | BBCH | Notes |
|---|---|---|
| Planting & Establishment | 0 | Elephant garlic is grown from individual cloves, planted in autumn - RHS advises it is "best planted in October" - so it gets the winter cold it needs and a long growing season. PLANTING DEPTH & SPACING: split the bulb into cloves and plant each one upright (pointed end up) so the tip sits about 2.5cm (1in) below the soil surface; the RHS garlic spacing is 15cm (6in) between cloves in rows 30cm (12in) apart, but because elephant garlic grows so large (up to 1-1.5m tall) many gardeners give it more room, around 20-30cm apart. In light soil, deeper planting can give bigger bulbs, but do not plant deep in heavy soil. Choose a sunny, open site on fertile, free-draining ground; on cold, wet clay grow it in large containers instead. Roots establish before winter. |
| Leaf Growth | 3 | Through winter and spring the clove grows into a tall, leek-like plant with broad blue-green leaves. Keep the bed weed-free so the plants are not crowded, and water in prolonged dry spells in spring. Feed only if the soil is poor. In early summer the plant throws up a tall flower stalk (scape) - cut this out as soon as it appears (and eat it, sauteed or roasted) so the plant puts its energy into the bulb rather than flowering. |
| Bulb Development | 7 | Through early to mid-summer the base swells into a large bulb that divides into a few very large cloves, sometimes with small hard "cormel" offsets around the outside. Ease off watering as the leaves begin to yellow so the skins firm and the bulb stores well. Keep weeding lightly; no further feeding is needed. |
| Harvest & Curing | 8 | Lift the bulbs once the leaves have turned yellow - for autumn-planted elephant garlic this is usually in mid- to late summer, after a long season (roughly 9-10 months from planting). Ease each bulb up gently with a fork rather than pulling, on a dry day. Dry (cure) the bulbs for two to four weeks in a warm, airy place until the skins are papery, then store them somewhere cool and dry at about 5-10°C, where they keep for several months. Save the largest cloves and any cormel offsets to replant the following autumn. |
Harvest & Storage
Diseases
Pests
Companion Planting
Elephant Garlic, Clove to Harvest
Plan your Elephant Garlic planting
When to sow and plant Elephant Garlic depends on your own frost dates. Check the UK vegetable planting calendar. To work out where it fits in your beds, sketch your plot in the free Garden Layout Planner.
Growing Elephant Garlic in another region
Sowing dates, frost timing and local advice differ by country. Use the guide for where you garden.
References
-
Qualitative only: southern/coastal last air frost often before end of April; further north well into May, in a few places into June. No numeric per-region frost dates published here.
-
US extension source: plant garlic from late September to November, cloves 2-3 in deep in rows 6-10 in apart with cloves 3-4 in apart in the row; each planted clove produces one bulb of 10-15 cloves; harvest when tops begin to yellow or fall over but before completely dry; cure the whole plant in a shady warm spot 1-2 weeks until skins are papery and roots dry; store at 32-40°F, dry, avoiding freezing. States that elephant garlic is very mild, stores poorly and is more closely related to leek than to garlic.
14 independent sources are cited for this crop. Where they disagree - soil pH is the clearest case - every figure is preserved rather than averaged into false precision.
Frequently Asked Questions
When should I sow elephant garlic in the UK?
In Scotland, from mid September. In Midlands, wait until early October. Treat these as a guide rather than a fixed date — the governing rule is to sow only once frost risk has passed and temperatures are reliably warm enough.
When do I sow elephant garlic?
Sow mid September to late November.
How long does elephant garlic take to grow?
Typically 180–240 days, depending on cultivar and growing conditions.
What soil pH does elephant garlic need?
A pH of about 6–6.5. That span reflects genuine variation between the authorities we cite rather than a single agreed figure — the References section lists each source's exact range.
What problems affect elephant garlic?
Our data links 2 diseases and 4 pests to this crop. See the sections above for each one and how to manage it.
Plan next season before the problems start
Most of the advice on this page comes down to timing and spacing — sowing at the right moment, rotating beds, and giving plants enough airflow. The UK Garden Planner lays your plot out month by month so those decisions are already made before the season starts.
Get the UK Garden Planner →Instant PDF download · Written for UK growing conditions
How this guide is put together
The growing data on this page — sowing windows, pests, diseases, soil and site requirements — comes from named horticultural sources, listed in References below, checked against RHS and Met Office guidance. An automated pipeline assembles that verified data into the page you're reading: it selects which facts to lead with and builds the surrounding prose and layout. It does not invent a date, a source or a number — where a verified value for a field isn't available, the page leaves it out rather than guessing. A person reviews and publishes each page; nothing goes live unverified.
Last verified 2026-09-02
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