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Parsley (Flat Leaf / Italian) is the workhorse herb of professional kitchens worldwide — a biennial grown as an annual whose flat, bright-green, deeply divided leaves have a clean, grassy, mildly herbaceous flavor that amplifies and brightens nearly every savory dish without dominating. Italian flat-leaf parsley (Petroselinum crispum neapolitanum) is preferred by chefs over curly parsley for its superior flavor intensity and its versatility: used fresh as a garnish, incorporated into chimichurri and gremolata, blended into herb sauces like salsa verde, added by the handful to stews and soups at the end of cooking, and eaten raw in tabbouleh and Middle Eastern salads where it is the primary ingredient rather than a garnish. The entire plant is edible: leaves, stems (which have even more flavor than the leaves and are perfect for stocks), and the root (Hamburg parsley) in some varieties.
Parsley is notoriously slow to germinate (21–28 days is normal), leading gardeners to abandon it prematurely. Soak seeds in warm water for 24 hours before sowing to speed germination. Start indoors 8–10 weeks before last frost (parsley resents root disturbance, so use biodegradable pots you can plant directly) or sow outdoors 3–4 weeks before last frost. Space plants or thin to 8–10 inches apart. Parsley grows best in cool weather but tolerates summer heat better than most herbs if consistently watered. Feed every 3–4 weeks with a balanced fertilizer — parsley is a moderate feeder. Harvest by snipping outer stems from the base, never stripping the central crown; the cut-from-outside approach extends production for months. Parsley is biennial: in mild climates (zones 7–9), it overwinters and resumes growth in spring before bolting in early summer of its second year. The second-year growth is perfectly usable until the plant bolts. Start new plants each year for the best production. Black swallowtail butterfly caterpillars (which are gorgeous green, black, and yellow) will occasionally defoliate parsley — decide whether to relocate them to a sacrifice plant or share your harvest with the next generation of butterflies.
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