Endive is the salad that makes people wince and then, a season later, become mildly obsessive. Sown in June, it sits through the hottest weeks doing very little; then in September and October — when the lettuce has bolted and the summer beds are being cleared — it turns into a dense, heavy rosette that will keep a household in salad for half the autumn. The catch is the bitterness. The answer to the bitterness is a step almost nobody bothers with: ten days under a plate.
Its botanical name is Cichorium endivia, and it divides neatly into two groups that behave quite differently in the garden. This guide covers both — the frilled frisée types and the broad-leaved escaroles — with the sowing window that avoids bolting, the spacing that lets a heart form, the blanching routine that turns a harsh leaf into a nutty one, and what to do with the plants still standing when the first frosts arrive.
- Sow June–July for the main autumn crop (March–August possible)
- Space 30 cm each way — escarole needs every centimetre
- Blanch 10–14 days before cutting, and only when the plant is dry
- Harvest 85–100 days from sowing · escarole under cover into November
Endive is not chicory — and the difference matters
The two are cousins and the names have been swapped around for a century, so it is worth being precise. Chicory is Cichorium intybus: a perennial with a fat taproot, properly hardy, and the species behind radicchio and the forced white chicon. Endive is Cichorium endivia: an annual, no useful taproot, milder in flavour and far less tolerant of frost. To complete the confusion, the forced chicon is sold in North America as "Belgian endive" and is not endive at all.
What that means in practice is simple. Endive is grown like a lettuce and eaten like a lettuce — one sowing, one head, cut and finished. Chicory is grown like a root crop and can be lifted, stored and forced in the dark through midwinter. If it is the forcing you are after, start with our Cichorium intybus range and the radicchio types; if you want a big autumn salad head, you want endive.
When to sow endive — and why September is too late
The main window is June to July. Endive needs eighty-five to a hundred days from sowing to a full heart, so a mid-July sowing hearts up in October, which is exactly when you want it. Earlier sowings are possible — several of our varieties are tagged from March — but they carry a risk: a young endive that meets a prolonged cold spell reads it as a passed winter and runs straight to seed instead of hearting. If you sow in spring, sow under cover and keep the plants growing steadily.
There is a summer problem too. Like lettuce, endive seed goes dormant above roughly 28 °C, which is why a July sowing into hot, dry soil can simply fail to appear. Sow in the evening, water the drill before the seed goes in rather than after, and shade the row with a board or a length of fleece until the seedlings show.
If it is already autumn as you read this, endive is not the crop to sow now — there is not enough light left to build a heart. Sow the leaves that do work at this time of year instead: see winter salad leaves beyond lettuce, winter lettuce and the full list in what to sow in September. Then diarise endive for next year: everything for the right moment is in the June and July sowing collections, and the vegetable sowing calendar maps the rest of the year.
Sowing endive, step by step
- Sow shallowly, in modules or straight into the bed One centimetre deep, two seeds per module or per station. Endive seed is small and needs light contact with damp soil, not burying.
- Germinate cool — 15–20 °C Seedlings appear in five to eight days. A shaded cold frame or a bench out of direct sun beats a warm windowsill in July, which is hot enough to stall germination altogether.
- Thin or plant out at 30 cm each way This is not the place to economise. A crowded endive makes a flat, open rosette with no heart to blanch, and the damp still air between close-planted heads is where rot starts in October. Harden module-raised plants off first — our hardening off guide covers the routine.
- Never let it check Endive that dries out and then recovers turns coarse and bitter, and often bolts. Water generously once or twice a week rather than a daily splash; our watering guide explains why. Grow it on ground that holds moisture — see soil preparation.
- Defend the heart Slugs adore the dense centre of an endive and pigeons strip the outer leaves in late autumn. A slug patrol on damp evenings and fine mesh over hoops handles both — see common garden pests.
Frisée or escarole?
Frisée — curled endive (var. crispum)
Finely cut, almost lacy leaves on a low, spreading rosette.
- Frisée, White Curled, De Meaux and organic Grosse Pancalière in our range
- Sharper flavour and the classic partner for bacon, walnuts and a warm dressing
- The least hardy group — lift or cover it once real frost is forecast
Escarole — broad-leaved Batavian (var. latifolium)
Wide, slightly wavy leaves that fold into a solid, cabbage-like heart.
- Batavian Green, Nuance, Avantgarde, Broadleaved Winter and organic Nummer Vijf
- Milder, meatier leaves that hold up in soup and braises as well as in salad
- Noticeably tougher — under a cloche it will stand into November
One variety deserves singling out. Blonde à Coeur Plein — "blonde with a full heart" — folds its outer leaves over the centre by itself, so it part-blanches without any help from you; it is in the range twice, including an organic version. Browse the whole species under Cichorium endivia.
Blanching: the ten days that make endive worth growing
The bitterness in endive comes from sesquiterpene lactones in the sap, and the plant produces them in response to light. Take the light away and the newest inner leaves grow pale cream instead of green, with a fraction of the bitterness and a distinctly nutty sweetness. It is the single step that separates a salad people politely leave and one they ask about.
Two methods work. The simplest is to gather the outer leaves up over the centre and tie them loosely with soft string, like a lettuce with its collar turned up. The other is to cover the whole plant with a large dinner plate, a slate or an upturned pot with the drainage hole blocked — anything that excludes light while letting air move underneath.
Three rules matter more than the method. Blanch only when the plant is completely dry, because a wet heart sealed under a cover turns to grey mould within days. Blanch just two or three plants at a time, since a blanched heart is on a clock and wants cutting within a week or so. And give it ten to fourteen days — check at ten, and if the centre is still green, cover it again for a few more.
Cut the whole head at the base with a knife, in the morning, and use it fresh. Endive is not a crop that goes into store, unlike the root vegetables you are lifting at the same time.
Common mistakes
- Sowing in spring without cover. A cold check on a young plant triggers bolting, and a bolted endive never hearts. June and July are the safe months.
- Planting at 20 cm. Endive needs the full 30 cm each way to build a heart and to dry out between autumn rains.
- Letting it go dry. Drought stress is the main cause of a genuinely unpleasant, coarse leaf. Water deeply and mulch.
- Blanching a wet plant. The fastest route to rot in the whole vegetable garden. Wait for a dry spell.
- Blanching the whole row at once. Blanched hearts do not hold. Do a few at a time and stagger them over three or four weeks.
Frequently asked questions
Can I sow endive in September?
Not for a heading crop — there is too little light and warmth left, and the plant will sit as a small rosette all winter without ever filling out. September sowings are worth it only as cut-and-come-again baby leaf under cover. For a proper autumn and winter salad supply sown now, see winter salad leaves and winter lettuce.
Why is my endive so bitter?
Three causes, usually together: it was never blanched, it went short of water, or it was cut in warm weather. Blanching alone transforms it. Cutting in the cool of the morning after a period of steady moisture does the rest — and a light frost sweetens escarole in the same way it sweetens kale.
Is endive frost hardy?
Only up to a point. Escarole shrugs off a light frost and, under a cloche or fleece, will stand into November; frisée is more tender and should be covered or cut as soon as a real freeze is forecast. Our guide to cloches, fleece and cold frames covers the options.
Why did my endive bolt instead of hearting?
Almost always a cold check when the plant was young, or a sowing made too early in spring. Endive that has been chilled below about 10 °C for a stretch as a seedling switches to flowering. Sow in June or July, keep the plants moving without a stall, and follow with a succession three weeks later — see succession sowing.
Endive earns its place by cropping in the gap — after the summer lettuce has given up and before the winter leaves are ready to cut. Plant it alongside the chard and corn salad that carry the same season, move it to fresh ground each year (crop rotation keeps the salad bed clean), and read the beginner's guide to growing vegetables from seed if this is your first autumn crop. Browse the full lettuce and chicory ranges, our organic vegetable seeds and everything else in vegetables, or work through the rest of our growing guides.
