How to Grow Elephant Garlic
On this page
- Elephant Garlic (Allium ampeloprasum var. ampeloprasum)
- Soil & Growing Conditions
- Growth Stages
- Quick Facts
- At a Glance
- Harvest & Storage
- Diseases
- Pests
- Companion Planting
- Elephant Garlic, Clove to Harvest
- Plan your Elephant Garlic planting
- Growing Elephant Garlic in another region
- Sources
- Frequently Asked Questions
Elephant garlic is ready to harvest 180–240 days after planting.
Elephant garlic (Allium ampeloprasum var. ampeloprasum) — Herbaceous perennial grown as a biennial-style crop.
Unlike an annual crop, the work here is front-loaded into establishment: get the planting and the site right and the same plants crop for several seasons.
The short answer
- 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
Soil & Growing Conditions
Growth Stages
| Stage | BBCH | Notes |
|---|---|---|
| Planting & Establishment | 0 | 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. |
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. |
| Edible parts | bulb (cloves) |
At a Glance
Harvest & Storage
Diseases
Pests
Companion Planting
Elephant Garlic, Clove to Harvest
Plan your Elephant Garlic planting
Timing for Elephant Garlic follows soil temperature and frost, not the calendar date. The Global vegetable planting calendar explains the method. 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.
Sources
These 2 sources are specific to this region. The full list of 14 sources behind this guide (FAO EcoCrop, GBIF, NC State Extension Gardener Plant Toolbox and others) is in the references of our UK guide to elephant garlic; they describe the plant itself, which is the same wherever it grows.
Frequently Asked Questions
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
This page gives you the thresholds; the planner turns them into your own calendar. It works from what you can observe and measure in your garden rather than from dates written for somebody else’s latitude.
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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 international horticultural research and extension sources. 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
Where To Go From Here
Take this crop from reading into a written plan for your own beds.
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Plan the next step
Use the printable SoilCommander planner for your region to turn this guide into sowing dates, bed layouts and weekly garden tasks.