How to Grow Escarole: Planting, Blanching & Harvest

Escarole (Cichorium endivia) is the broad-leaved, mild-mannered member of the endive family—the same species as frilly curly endive (frisée), but with wide, smooth, slightly ruffled leaves and a gentler flavor. The outer leaves are sturdy and faintly bitter, perfect for wilting into soups and sautés (it is the classic green in Italian escarole-and-beans), while the pale inner heart is sweet and tender enough for salads. Like all endive, escarole is a cool-season crop grown much like lettuce, and like its curly cousin it benefits from blanching: excluding light from the heart for a couple of weeks before harvest mellows the bitterness and produces a creamy, tender center. It is productive, cold-tolerant, and especially rewarding as a fall crop, when cool weather and light frost bring out its best flavor. This guide covers timing, sowing, spacing, watering, blanching, and harvesting escarole.

Timing and Climate

Escarole grows best in cool weather, thriving in the 60s°F much like lettuce and its curly endive relative. Hot weather pushes it to bolt and intensifies the bitterness, so the goal is to time plantings so the heads mature during cool conditions. It is somewhat more heat- and cold-tolerant than lettuce, which gives you a little more flexibility at the ends of the season, but cool maturity is still the key to mild, tender escarole.

There are two planting windows. For a spring crop, start seed indoors four to six weeks before the last frost and transplant out as the soil warms, or direct-sow a few weeks before the last frost, aiming to harvest before summer heat. The fall crop is usually superior: sow in mid- to late summer so the plants mature in the cooling days of autumn, when the flavor sweetens and a light frost actually improves the leaves. In mild-winter regions (zones 8 and warmer), escarole can be grown through fall and into winter. Popular varieties include ‘Broadleaf Batavian’ (a classic large, sweet type) and ‘Natacha’.

Soil and Sowing

Escarole wants the same conditions as lettuce and endive: fertile, moisture-retentive, well-drained soil rich in organic matter, with a near-neutral pH around 6.0 to 6.8. Dig in a couple of inches of compost before planting to feed the crop and help the soil hold the steady moisture that keeps the leaves mild and tender.

Sow seed about a quarter-inch deep, either directly in the garden or in cell trays for transplanting; germination takes roughly 7 to 14 days. Because escarole forms a broad, spreading rosette, give it room—thin or transplant so the mature plants stand 10 to 12 inches apart in rows about 18 inches apart. Generous spacing lets the heads develop fully and keeps air moving through the dense foliage, which reduces the rot that can plague a crowded, blanched heart. For a continuous supply, make small successive sowings two to three weeks apart through each cool-season window.

Watering and Feeding

Steady moisture is essential. Escarole is shallow-rooted, and any drought stress quickly translates into tougher, more bitter leaves and a greater risk of bolting. Aim for about 1 to 1.5 inches of water a week, keeping the soil evenly moist but never waterlogged, and water more in warm or windy weather. A 1- to 2-inch straw or shredded-leaf mulch conserves moisture, moderates soil temperature, and keeps soil from splashing into the rosette where it can cause grit and rot.

Escarole is a moderate feeder. If the soil was well amended with compost at planting, it may need nothing further; otherwise, a light side-dressing of balanced fertilizer or a feeding of dilute liquid fertilizer midway through growth keeps it growing fast. Quick, uninterrupted growth produces the mildest, most tender leaves, so do not let the plants stall in dry or impoverished soil.

Blanching for a Sweet, Tender Heart

Escarole’s broad outer leaves are naturally less bitter than curly endive’s, so some gardeners eat it unblanched—but blanching the heart still pays off, turning the inner leaves pale, sweet, and tender enough for salads. The principle is the same as for endive: exclude light from the center for the last two weeks or so before harvest. Deprived of light, the inner leaves stop producing bitter compounds, lose their green color, and become creamy and mild.

Begin blanching when the plant is nearly full size. Crucially, make sure the leaves are completely dry first—blanching a wet head traps moisture and invites rot in the enclosed heart. The simplest method is to gather the outer leaves up over the center and tie them together with soft twine, forming a closed bundle that shades the heart. You can also lay a board, a plate, or an inverted pot over the plant to block light, or in mild weather simply set a flowerpot over the whole rosette. Check periodically and harvest within roughly two weeks; leaving a blanched, enclosed head too long—especially in warm or wet conditions—leads to rot.

Harvesting and Using Escarole

Escarole is generally ready to harvest about 80 to 100 days from sowing, after its blanching period. Cut the whole head at the base with a sharp knife once the heart has blanched to a pale, tender center, harvesting in the cool of the morning when the leaves are crisp. You can also pick individual outer leaves over time as a cut-and-come-again crop and let the plant keep producing; the outer leaves are sturdier and a touch bitter, which is exactly what you want for cooking.

That dual character is escarole’s great virtue in the kitchen. The robust outer leaves stand up to heat and are superb wilted into soups, braised, or sautéed with garlic and oil—the foundation of the beloved escarole-and-white-bean dishes—while the pale, blanched heart goes raw into salads. Cut escarole keeps for up to a week or so in the refrigerator, loosely wrapped and stored in the crisper. Because the fall crop is sweetened by cool weather and light frost, autumn heads have the best flavor and a longer harvest window. For its frilly relative grown almost identically, see our guide to growing endive, and explore more cool-season leaves in the Plants & Flowers hub.

Pests, Disease, and Troubleshooting

Escarole shares the common issues of leafy greens, most of which are prevented by good spacing, even moisture, and cool-season timing:

• Bitter leaves: The usual complaint. Caused by heat, drought stress, or skipping blanching. Grow in cool weather, water consistently, and blanch the heart before harvest.
• Bolting: Premature flowering brought on by heat or long days. Plant for cool-season maturity, favor a fall crop, and keep growth steady.
• Heart rot: Develops when a wet head is blanched or harvest is delayed; blanch only dry plants and harvest within about two weeks.
• Aphids: Hide in the dense heart; rinse or use insecticidal soap, and inspect before blanching.
• Slugs and snails: Chew the leaves in damp weather; use traps, barriers, or bait and avoid soggy mulch.
• Downy mildew and leaf spot: Fungal problems in crowded, wet conditions; improve spacing and airflow and water at the base.

Succession, Season Extension, and Storage

Like endive, escarole rewards succession sowing—a small batch every two to three weeks during the cool windows gives a steady harvest rather than a single flush that all matures at once. The fall crop is the most satisfying: as nights cool, the leaves sweeten and a light frost only improves them, and escarole’s better-than-lettuce cold tolerance lets it stand in the garden later into the season. A row cover or cold frame extends the fall harvest well past the first frosts, and in mild climates escarole can carry on into winter.

With attention to cool-season timing, consistent moisture, and that final blanching step, escarole gives you two crops in one—hearty cooking greens from the outer leaves and a sweet, tender salad heart at the center. It is one of the most useful and underrated greens for the fall and early-winter kitchen garden. To keep harvesting fresh salad even deeper into winter, pair escarole with the supremely cold-hardy green in our mâche (corn salad) guide.