Chicories

The bitter-salad family - radicchio, endive, escarole, frisee, and forced Belgian endive - and the fall garden's signature salad crop, sown in midsummer to head up as the nights turn cold.

Sow shallow in midsummer for a fall crop, thin hard, keep steady moisture for milder leaves, and blanch the endive types - while witloof is grown for its root to force later.

Grow most chicories like a fall-timed lettuce. Direct-sow (or set transplants) in midsummer — roughly 8 to 12 weeks before your first frost — so heads mature and firm in the cooling weather; that timing is the whole secret, because heading types sown in spring almost always bolt to a bitter flower stalk before they head. Sow shallow (about ¼ inch), thin to 8-12 inches, and keep the soil evenly moist: heat and drought are what turn chicory harshly bitter and loose. Give it full sun and your ordinary garden soil; it is not a fussy or hungry crop.

Two kinds ask for a special move. For endive and escarole, borrow the old market-gardener's trick and blanch the heart a week or two before cutting — tie the outer leaves up over the center, or cap each plant with a pot — to grow a pale, tender, far less bitter core. And witloof (Belgian endive) rewrites the plan entirely: you sow it in late spring or early summer and grow it all season for the root, not the leaves, then dig, store, and force those roots in darkness through winter (see Harvest and Storage). One packet of chicory seed, three completely different growing calendars.

Steady water for mild leaves, a light feeding, slug patrol early and aphid checks in the heart - then let the cold nights do the sweetening.

Chicory care is mostly about flavor and firmness. Keep the water steady and even — the single biggest lever on bitterness — and feed only lightly, since too much nitrogen grows a loose leafy plant that never hearts up into a solid head. Guard seedlings from slugs from day one, and check the developing hearts for aphids, which love to hide deep in a folding head where you won't see them until you cut it open. Blanch the endive types as heads near full size to tame the bite.

The finish is the easy part: chicories are hardy, and light fall frosts are a feature, not a threat. Radicchio firms and turns a deeper burgundy after cold nights, sugarloaf and escarole grow sweeter, and the whole crop shrugs off weather that flattens lettuce. In mild-winter zones, radicchio and sugarloaf will sit in the garden for weeks as a living refrigerator; farther north, a row cover or cold frame stretches the harvest into early winter. Do less as it gets cold, and let the season do the seasoning.

Three harvests in one crop: cut radicchio heads firm (peel the ragged wrapper to the jewel inside), cut blanched endive and escarole rosettes, and dig witloof roots to force pale chicons in the dark.

Each kind has its own ready sign. Radicchio and sugarloaf: cut at the base when the head is firm to a squeeze, like a small cabbage. The outer wrapper leaves often look ragged or frost-nipped — that's normal; peel them back to the tight, deeply colored heart inside. Endive and escarole: cut the whole rosette at the soil line at full size, ideally after a week or two of blanching, with the heart pale and mild — always before a central stalk rises, which turns the plant bitter. Cut in the cool of the morning for the crispest leaves.

Witloof (Belgian endive) is the showpiece, and its harvest is a two-act play. First, in late fall after a frost or two, dig the roots, trim the leafy tops back to about an inch, and cull any that are thinner than a big carrot. Then force them: stand the roots upright and close together in a deep box of damp sand or potting soil, and hold them in complete darkness at 50-60°F. In three to four weeks each root pushes up a tight, creamy-white chicon 4-6 inches long; cut it from the crown and the root may offer a smaller second one. The darkness is non-negotiable — any light greens the chicon and makes it punishingly bitter.

Firm heads keep for weeks in the crisper; witloof roots force in batches through winter for a steady supply of fresh chicons, which must be kept dark to stay pale and sweet.

The heading chicories are excellent keepers. Whole, unwashed radicchio and sugarloaf heads hold two to three weeks in the crisper (the tight core keeps even longer), and escarole and frisee keep about a week wrapped. In mild zones you can simply leave firm heads standing in the cold garden and cut as needed. Trim, wash, and dry the leaves only when you're ready to eat — surface water is what turns cut chicory slimy.

Witloof turns storage into a season-long supply. Dug roots keep for weeks to months packed in damp sand in a cold cellar or the fridge (near 32°F), and you force them in batches — a few every couple of weeks — for a steady flow of fresh chicons from late fall clear into spring. A cut chicon keeps a week or two wrapped in the crisper, but keep it in the dark: even refrigerator light will green and bitter it over a few days, which is why they're sold wrapped in blue paper. This is winter salad grown from stored roots while the garden sleeps.

A biennial that flowers and seeds its second year; let a plant overwinter and bloom, isolate it from other chicories (including the roadside kind), and one plant hands you seed for years.

Chicories are biennials: they build a leafy head or root the first year and flower the second. To save seed, leave a healthy plant (or replant a good witloof root) in the ground over winter and let it send up its wiry, sky-blue flower stalks the following summer — the same blue chicory flowers you see on the wild plant. When the small seed heads dry and turn tan, cut the stalks, dry them another week or two, and rub out the seed. Stored cool and dry, chicory seed stays viable 4-6 years, and one plant makes hundreds of seeds. That two-year cycle applies to the C. intybus kinds — radicchio, sugarloaf, and witloof. The C. endivia kinds — endive, escarole, and frisee — behave as annuals and flower and set seed in their first season, which is exactly why escarole bolts from a spring sowing; save their seed by letting a spring-sown plant run up to flower rather than by trying to overwinter it.

The catch is crossing. Chicory is insect-pollinated and outcrosses freely, and every Cichorium intybus will cross with every other one within a few hundred feet — your radicchio with your neighbor's, your witloof with the wild roadside chicory blooming down the lane. (The endive species, C. endivia, is more self-pollinating and comes truer.) To keep a variety pure, grow only one intybus type for seed in a given year, or cage and hand-pollinate. Do that once and you never buy chicory seed again — but let it cross, and you'll grow a lottery of bitter blue-flowered mongrels.

Genuinely nutritious bitter greens - vitamins A, K, and folate, plus digestion-stimulating bitter compounds - and radicchio's red leaves add anthocyanin antioxidants.

Chicories are among the more nutritious things in the salad bowl, and their bitterness is part of the value. The leaves supply vitamins A (as beta-carotene), K, and C, folate, potassium, and fiber, along with the sesquiterpene-lactone bitter compounds (the same lactucin-family molecules found in the wild plant) that traditionally stimulate appetite and digestion — the whole reason bitter greens end a rich meal in so many cuisines. The red radicchios add anthocyanins, the purple-red antioxidant pigments, on top.

Because chicory carries its nutrition into the cold months when the garden is otherwise bare, it fills a real seasonal gap: fresh, vitamin-rich greens in late fall and winter. Blanching endive trades a little of that pigment and vitamin content for mildness (the pale forced witloof chicon is the least bitter and least colorful), so eat a mix — the darkest radicchio for antioxidants, the pale hearts for gentleness — and you get the best of both.

Bitterness as a feature: radicchio grilled or in risotto, frisee in a warm bacon salad, escarole braised or in soup, and Belgian endive raw in boats or baked into a gratin.

The trick with every chicory is to treat the bitterness as a partner for richness, sweetness, and acid. Radicchio is bitter and crunchy raw (shredded into a slaw or tossed with a sweet-sharp vinaigrette, orange, and toasted nuts), but grilling or roasting a wedge until the edges char turns it smoky and almost sweet — and Venetian cooks fold Treviso into risotto and pasta. Frisee, with its fine curly leaves, is the classic base for the French frisée aux lardons: warm bacon, a poached egg, and a mustardy dressing that the bitterness cuts perfectly.

Escarole is the cook's chicory — its broad leaves are wonderful wilted with garlic and oil, simmered into Italian escarole and beans or wedding soup, or the tender blanched heart used raw in salad. Belgian endive (witloof) is the elegant one: the crisp, pale, faintly bitter leaves make perfect scoops and canapé boats raw, or you braise the whole chicons in butter and bake them into a gratin. Across the family, a pinch of salt, a squeeze of lemon, a little fat, or a few minutes of heat all soften the bite — bitterness is a flavor to play with, not to fear.

Honest answer: this is food, not medicine - though as tamed chicory it shares the wild plant's tradition of bitter, digestion-stimulating greens and inulin-rich roots.

This section records how people have traditionally used this plant, and what is known about the risks. It is history and general information — not medical advice, and not a recommendation to treat anything. Plants are not dosed like medicines, some interact with prescriptions, and some are harmful in ways that are not obvious. Talk to a clinician before using any plant medicinally.

The cultivated chicories are food, not medicine, and the honest framing is a nutritional one: bitter salad greens that stimulate the appetite and digestion the way traditional diets always used bitters before or after a rich meal. They are the tamed, milder children of wild chicory (its own entry in this catalog), which carries the genuine herbal tradition — a digestive and liver bitter since antiquity — and the chicory root grown for Belgian endive is the same inulin-rich taproot valued as a prebiotic fiber.

So there's a real thread of tradition here, but centuries of breeding for mildness have deliberately dialed down the potent bitter compounds that carried it. Enjoy radicchio and endive for what they are: healthful, vitamin-rich greens whose gentle bitterness is good for the palate and the appetite. If it's the medicinal bitter-tonic and roasted-root uses you're after, that story belongs to the wild plant, not these refined salad forms.

Centuries of Italian and Belgian selection from wild chicory gave us radicchio and endive - and Belgian endive was a lucky 1830s accident, roots forgotten in a dark Brussels cellar.

Every chicory in this family traces back to the tough, blue-flowered wild chicory of the Mediterranean roadside, eaten and used medicinally since antiquity. Over centuries, growers in different corners of Europe pulled it in different directions: Italian gardeners around Treviso, Chioggia, and Castelfranco selected the ruby heading radicchios (and learned that forcing and frost sweetened them), while others bred the broad-leaved escarole and curly frisee of the Cichorium endivia line for the salad bowl.

The most charming chapter is Belgian endive. As the story goes, a farmer near Brussels in the 1830s stored chicory roots in a dark cellar and, weeks later, found them sprouting pale, tender, delicious shoots. Belgian growers refined the accident into an industry — grow the root, force it in the dark — and named the ivory spears witloof, 'white leaf.' It remains a Belgian specialty and a small miracle of the winter table: a gourmet vegetable conjured from a dug root and a dark box, from the same wild weed that colors the summer roadsides blue.

Bitter or bolting means heat or a spring sowing (sow midsummer); loose heads mean heat or too much nitrogen; a green witloof chicon means light got in.

Harshly bitter leaves: heat, drought, or age — keep water steady, harvest in the cool seasons, and blanch endive and escarole; cold weather and cooking both mellow the bite. Plants bolt to a flower stalk before heading: almost always a spring sowing of a heading type — switch to midsummer sowing for a fall crop, the single most important fix. Loose, leafy heads that never firm: too much heat during heading, or too much nitrogen — time the crop for cool weather and feed lean. Brown, papery inner-leaf edges (tipburn): a calcium-delivery hiccup from uneven moisture — steady the watering. Ragged holes and slime: slugs on seedlings — bait or patrol early. Aphids discovered inside a cut head: they hide deep in the folding heart — soak heads before serving and check the crown. Witloof chicon is green and very bitter: light leaked into the forcing box — force in complete darkness. Chicon is loose and leafy, not tight: the forcing was too warm, or the root too small — hold near 55°F and force only carrot-thick roots.

North: a midsummer-sown fall crop finished by frost. Middle zones: fall is prime, with cold frames stretching it. Mild-winter South: overwinter radicchio, and grow the whole family fall through spring.

Zones 3-5: chicory is a fall crop — sow in midsummer so heads firm before hard freezes, and use a cold frame or low tunnel to carry radicchio and escarole into early winter; witloof roots dug in fall force happily in a cool basement while snow flies. Zones 6-8: the family's heartland — midsummer sowings head up in the cool, frost-sweetened fall, and light spring sowings of frisee and escarole squeeze in a crop before summer heat. Zones 9-10: flip the calendar — grow chicories fall through winter and into spring, when the weather is cool and the bitterness stays in check; overwintered radicchio colors up beautifully in the mild-winter garden, and summer is simply the off-season.

Everywhere, the same rule governs quality: cool weather makes sweet, firm, colorful chicory; heat makes bitter, loose, bolting chicory. Radicchio in particular needs cold nights to reach its deep burgundy and best flavor, which is why fall and mild winters are its natural home. Match the crop to the cold shoulder of your year and chicory rewards you with salad long after the lettuce is gone.