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Endive (Tres Fine) is a delicate, fine-leaved curly endive (frisée) producing beautiful rosettes of intricately curled, narrow leaves with a pleasantly bitter flavor that's milder than broad-leaved chicory. Growing in zones 3–9 as a cool-season annual, Tres Fine matures in 85–95 days and is most flavorful in fall when cool temperatures soften the bitterness. The white, blanched inner leaves — naturally self-blanching in the tight center of the rosette — are the prized portion: mild, tender, and elegant in French salads, garnishes, and alongside grilled meats. Tres Fine is a staple of French cuisine and restaurant salads, and home-grown examples dramatically outperform anything available in supermarkets.
For fall-harvested endive, direct sow Tres Fine in midsummer (late June to July) in full sun to light shade. Sow thinly 1/4 inch deep in rows 12 inches apart; thin to 9–12 inches. Endive needs consistently moist, fertile soil for rapid, even growth — irregular moisture causes bitterness. To blanch the inner leaves (reducing bitterness and whitening the center), tie the outer leaves loosely over the center with twine or rubber band for 2 weeks before harvest. Or allow the plant to self-blanch by growing tightly spaced in rows where outer leaves naturally shade the center. Harvest by cutting at soil level when the head feels firm and the center is pale yellow-white. Flea beetles can be controlled with row covers from transplanting.
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