A cool-season leafy green with a pleasantly bitter edge, endive produces dense heads or frilly rosettes that thrive where lettuce struggles in autumn chill.
Cichorium endivia · also called escarole, frisée
Windows are counted from the average date of your last spring frost.
Endive fills the gap between the end of summer crops and hard frost, delivering harvests when most salad greens have bolted. Its bitterness mellows with blanching (excluding light from the inner leaves to reduce chlorophyll and soften flavor), making it far more versatile than its reputation suggests.
A little history. Cichorium endivia comprises two cultivar groups: var. crispum (curly-leaved frisée) and var. latifolium (broad-leaved escarole). Both are native to the eastern Mediterranean basin, documented in cultivation since at least the 16th century.
Sow seeds ¼ inch (6 mm) deep, and aim for 12 inches (30 cm) between plants once thinned. Sow seeds no deeper than ¼ inch and keep the top half-inch moist until sprouts appear; seeds need light to germinate reliably — do not bury deeply. Seedlings emerge in 5–14 days.
Beds preferred for full heads; containers work for cut-and-come-again harvesting of outer leaves. Needs at least 8 inches of soil depth. In containers: 3-gallon pot per plant, 10 inches deep minimum.
Water deeply twice a week; increase to every other day during warm spells above 75 °F (24 °C). Water when the top inch of soil feels dry to the touch. Aim for about 1 inch per week including rain.
Side-dress (scatter fertilizer along the row and water in) once at transplanting or thinning, then again when heads begin to form. What to use: balanced 5–5-5 organic granular or compost worked into the top 2 inches.
No pruning needed. To blanch (exclude light from inner leaves to reduce bitterness and soften texture), gather outer leaves loosely over the heart and secure with a rubber band or twine for 10–14 days before harvest. Do this only in dry weather to prevent rot.
It's ready when heads feel firm and dense when gently squeezed; outer leaves are fully expanded and deep green; inner leaves are pale yellow-white if blanched. Harvest before the center begins to elongate upward. Cut the whole head at the base with a sharp knife just below the lowest leaves. Alternatively, harvest outer leaves individually from young plants, leaving the growing center intact for continued production.
Unwashed, loosely wrapped in a damp paper towel inside a perforated plastic bag in the refrigerator crisper drawer. Use within 2–3 weeks. Do not store near ethylene-producing fruits such as apples or pears.
Sow a new batch every 3 weeks from midsummer through late summer to extend the autumn harvest window. Spring sowings are secondary — focus succession effort on the fall crop.
Radish
Radishes size up in about a month and are pulled long before endive rosettes close over the bed, so the two rarely compete; the radish taproot also works a deeper slice of soil than endive's shallow feeding roots.
Carrot
Carrots send a single deep taproot well below endive's shallow mat of feeder roots, so the two can share a row without fighting over water. Keep carrots on the sunny side, since endive leaves spread wide.
Strawberry
A low mat of strawberry leaves shades the soil surface and slows drying, which suits endive's need for steady moisture. Leave 12 inches of clear ground around each head so air still moves through the crown.
Garlic
Garlic's strong smell can help hide endive from aphids that locate host plants by scent, and under low pest pressure a garlic edging often reduces early colonies. Do not expect it to stop a heavy infestation.
Chervil
Let a few chervil plants flower and their small flat flower clusters feed hoverflies and tiny parasitic wasps, whose larvae hunt aphids on nearby endive. Chervil also stays low and shade-tolerant, so it does not crowd the heads.
Fennel
Fennel roots release compounds that stunt most garden vegetables, and endive seedlings planted near it grow slowly and stay small. Keep fennel in its own corner or a pot — its flowers do feed hoverflies and tiny parasitic wasps, so it earns a place well away from the salad bed.
Give the lettuce family 2 years away from this spot before any of its relatives return.
The pea and bean family, the cabbage family or the tomato family thrive in this ground next season.
Endive is a light feeder and leaves the bed in much the same shape it found it, with a shallow root mat that breaks down fast. Wait 2 years before any lettuce-family crop returns here. Peas or beans, cabbage-family greens, or tomatoes and peppers all follow well.
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