How to Grow Sand Leeks
On this page
Sand leeks (Allium scorodoprasum) — bulbous herbaceous perennial.
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.
Core growing advice on this page is checked against named horticultural sources — see References.
Sand Leek (Allium scorodoprasum)
3 sources cited · Verified
Soil & Growing Conditions
Water: moist but well-drained or well-drained; drought-resistant once established (RHS)
Growth Stages
| Stage | BBCH | Notes |
|---|---|---|
| Planting | 0 | Plant bulbs in autumn, 3-6 inches deep, spaced 4-6 inches apart; or propagate by seed sown when ripe or in spring (Nature & Garden, RHS). |
| Leaf growth | 3 | Narrow, grassy mid-green leaves develop; the plant thrives in full sun on fertile, well-drained soil (RHS). |
| Flowering and bulbil formation | 6 | Leaves die back as flowering begins; long wiry stems in early summer carry purple, umbrella-shaped flower clusters that develop bulbils at their base -- the spread RHS warns can become a nuisance without careful management. |
| Harvest / dieback | 8 | Harvest once the leaves yellow and die back, typically late summer to early autumn (Nature & Garden); remove old flowered stems and foliage as the only needed maintenance. |
Quick Facts
| Factor | Value |
|---|---|
| Soil texture | chalk, loam or sand (RHS) |
| Drainage | well-drained |
| Lifecycle | bulbous herbaceous perennial |
| Edible parts | bulbs, bulbils |
At a Glance
Harvest & Storage
When to pick: Harvest when the leaves start to yellow and die back, typically late summer to early autumn (Nature & Garden). Bulbils forming at the base of the flower clusters can also be collected for propagation or use.
Diseases
Pests
Sand Leek, Bulbil to Bloom
Plan your Sand Leeks planting
Timing for Sand Leeks 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 Sand Leek in another region
Sowing dates, frost timing and local advice differ by country. Use the guide for where you garden.
Sources
-
A secondary gardening reference rather than a university or horticultural authority, used only for the common-name/harvest-cue context RHS does not cover, not contradicted by any higher authority. Note that "rocambole" is also the common name of a DIFFERENT plant, Allium sativum var. ophioscorodon (hardneck garlic), a separate crop covered elsewhere on this site -- this source and this taxon record concern only Allium scorodoprasum, the true wild sand leek, not that hardneck garlic variety. Sand leek (Allium scorodoprasum), also called rocambole in some regional usage and Korean pickled-peel garlic, is a Eurasian wild onion native across much of Europe, the Middle East and Korea. Plant bulbs in autumn, about 3-6 inches deep and spaced 4-6 inches apart. Harvest when the leaves start to yellow and die back, typically late summer to early autumn.
-
PFAF entry for Allium scorodoprasum. Fetched and parsed directly for the USDA hardiness rating.
These 2 sources are specific to this region. The full list of 3 sources behind this guide (Nature & Garden, Plants For A Future (PFAF), Royal Horticultural Society) is in the references of our UK guide to sand leeks; they describe the plant itself, which is the same wherever it grows.
Frequently Asked Questions
What problems affect sand leeks?
Our data links 2 diseases and 2 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.
Get the Global Garden Planner →Instant PDF download · Works in either hemisphere
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 2026-08-28
Related guides
More from the same group (the onion family):
Where To Go From Here
Take this crop from reading into a written plan for your own beds.
Keep going
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.