How to Grow Elephant Garlic in Ireland
Elephant garlic is planted in Ireland from October to November, one clove at a time, 10 to 15 cm deep and 30 cm apart. Next summer each clove becomes a bulb the size of your fist, with a flavour like garlic's gentler cousin: mild, sweet and brilliant roasted whole. It is also one of the few "garlics" you can turn into a permanent perennial patch. Here is the full method.
Short on time? Planting season is now. Our elephant garlic cloves are grown at the Earthling Plants nursery in Co. Wicklow and ship ready to plant.
What Elephant Garlic Actually Is
Despite the name, elephant garlic is not a garlic at all. It is Allium ampeloprasum, a very old cultivated member of the leek branch of the onion family, selected over centuries for its enormous bulbs rather than its leaves. That family tree explains everything about it: the mildness, the leek-like sweetness when cooked, the tall strappy leaves, and the sheer size, with a single clove often outweighing a whole bulb of ordinary garlic.
It also explains why it suits Ireland so well. Leeks are one of the few crops that genuinely love our climate, and elephant garlic inherits that constitution: fully hardy, untroubled by rain, and far more forgiving than true garlic about the odd imperfect season. For anyone who finds raw garlic too much, this is the gentle version, and for cooks it is a different ingredient altogether rather than a substitute.
In the Kitchen
Roasting is where it earns its keep: whole cloves roasted in their skins for 30 to 40 minutes collapse into a sweet, nutty paste for spreading on bread or stirring through mash. Sliced raw it is mild enough for salads, where true garlic would bully everything. The spring scapes, snapped off while tender, are a second crop entirely, and make the best pesto of any allium. One plant, three different ingredients.
Elephant Garlic Quick Facts
Latin name: Allium ampeloprasum, which makes it a leek relative, not a true garlic
Plant: October to November, or February to March as a backup
Depth and spacing: 10 to 15 cm deep, 30 cm apart
Position: full sun, free-draining fertile soil
Harvest: June to July, when the leaves yellow
Hardiness: fully hardy in Ireland
Flavour: mild and sweet, closer to roast leek than raw garlic
Step 1: Split and Space the Cloves
Break the bulb into individual cloves just before planting, keeping the papery skins intact. Each clove wants 30 cm in every direction; they are big plants, closer to a leek than a garlic in stature, with strap leaves that can reach a metre. A dozen cloves fills a 1 by 1.2 m bed and gives a serious harvest.
Step 2: Plant Deep in Free-Draining Soil
Plant each clove pointy end up, 10 to 15 cm deep. That is much deeper than ordinary garlic, and the depth matters: it anchors the tall plant and keeps the developing bulb cool and even. In heavy ground, work in compost first or plant on a ridge, because sitting in winter water is the one thing that kills them.
Pick the bed with the usual allium rule in mind: do not plant where onions, leeks or garlic grew in the last couple of years, so the soil diseases that follow the family never build up. A bed that fed a hungry crop like potatoes or squash, topped up with compost, is ideal. Full sun grows the biggest bulbs; light shade grows slightly smaller ones and is still worth it.
Step 3: Let Winter Do Its Work
Autumn-planted cloves root quickly, show green shoots before Christmas, and shrug off frost. A period of winter cold actually helps the bulb split into cloves rather than staying as one solid round. There is nothing to do until spring except keep the bed weeded.
Step 4: Spring Care and the Scape Question
From March, keep the bed weed-free and water in any long dry spell, especially May and June when bulbs are swelling. In early summer each plant sends up a dramatic flower stalk, the scape, with a bud like a wizard's hat. Snap scapes off while young so energy goes into the bulb, then eat them: chopped into stir fries or blended into pesto, they are a crop in themselves.
Step 5: Harvest and Cure
Lift the bulbs in June or July, once the lower leaves yellow, using a fork rather than pulling the stems. Brush off the soil and dry them somewhere airy for two to three weeks until the skins are papery. Cured bulbs store until mid-winter, and the biggest, best bulbs are next autumn's planting stock.
The Perennial Trick
Leave a few plants in the ground at harvest time and elephant garlic behaves like the perennial it really is: each bulb resprouts as a clump, and the small corms that form around the base grow into new plants over a season or two. A corner of the garden given over to it becomes a permanent supply, which is exactly how we treat alliums in the perennial vegetable beds here.
Troubleshooting Elephant Garlic
One solid round instead of cloves: normal in year one or from spring planting; replant the round and it splits next year
Rust (orange spots on leaves): common on all alliums in damp summers; it looks bad but bulbs usually size up anyway
Rotting cloves: winter waterlogging; next time plant on a ridge or in a raised bed
Small bulbs: usually crowding or a dry May; space at 30 cm and water while bulbs swell
FAQ: Growing Elephant Garlic
Is elephant garlic real garlic? No. It is Allium ampeloprasum, botanically a leek that forms huge garlic-like bulbs. That is why the flavour is milder and sweeter than true garlic, and why it roasts so well whole.
Why did my elephant garlic grow one big round instead of cloves? It usually means the plant missed a proper cold spell or had a short season, which happens with spring planting. Replant the round in autumn and it will almost always divide into cloves the following summer.
Can you grow elephant garlic in pots? Yes, in a deep container of at least 10 litres per clove, with free-draining compost and steady water in late spring. Bulbs run slightly smaller than in open ground but the method is the same.
When do you harvest elephant garlic in Ireland? June to July, when the lower third of the leaves has yellowed. Earlier and the bulbs are undersized; much later and the skins split and store poorly.
Plant a Patch This Autumn
One autumn planting of a few cloves, with the biggest bulbs replanted each year, keeps a kitchen in mild garlic more or less forever. Alongside it, garlic chives and chives give you the same flavours in perennial, cut-and-come-again form.
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