Plant

Arugula

Eruca vesicaria

Also known as: rocket, rucola, roquette

Peppery leafy salad green (*Eruca vesicaria*, family Brassicaceae) native to the Mediterranean basin and cultivated since Roman times. One of the fastest-growing, easiest, and most-rewarding crops for the home gardener — direct-seeded, harvestable in 25–40 days, cut-and-come-again for multiple harvests per planting. The pepper-mustard flavor concentrates as the plant ages or stresses. Wild arugula (*Diplotaxis tenuifolia*) is a related perennial with more pungent flavor and serrated leaves; often called 'wild rocket' in markets.

Arugula is one of the most generous gifts a beginning gardener can give themselves. From seed to harvest in 25–40 days. Tolerates cool weather better than lettuce; tolerates heat worse, but bolts to flower at a stage when the flowers themselves are edible (and beautiful). Direct-seeds reliably, transplants reluctantly. The pepper-mustard flavor concentrates as the plant ages, so the choice of when to harvest determines what you taste — young leaves are mild, mature leaves sharp, flowering plants peppery-and-mustardy.

How to grow

Direct seed in cool weather — early spring through late spring, then again in late summer for fall harvest. Heat triggers bolting.
Sow shallow (1/4 inch deep), broadcast or in rows, in fertile soil
Germination: 5–7 days in cool soil
Harvest in 25–40 days as cut-and-come-again — cut outer leaves 1 inch above the soil; central crown regrows for another 2–3 cuts
Succession-plant every 2–3 weeks through cool seasons for continuous supply
Bolt management: in warm weather, plants bolt within 2–3 weeks of emergence; either cut everything before bolt or let some go to flower for the bees and seed-saving
Spacing: 4–6 inches between mature plants if growing for full-size leaves; closer for baby-leaf harvest

Climate notes

Cool-season crop: best in spring and fall in most temperate climates
Mediterranean climate: produces nearly year-round (with summer pause)
Pacific Northwest: superb conditions; year-round production easy
Hot summer climates: skip July–August; plant for fall harvest

Pests and disease

Flea beetles: the principal pest — small holes in leaves. Manageable with row cover during the first 2–3 weeks of growth.
Cabbage worms and loopers: occasional; rarely catastrophic at this scale
Pre-flower bolting: not a pest but a major timing issue in hot conditions

Varieties

Standard arugula (Eruca vesicaria) — the most widely-grown; fast and mild young, peppery mature
Wild rocket / sylvetta (Diplotaxis tenuifolia) — perennial; more deeply lobed leaves; more pungent flavor; slower to grow
Astro — bolt-resistant cultivar
Sylvetta (perennial wild rocket) — produces longer in heat
Italian Rocket varieties — various traditional lines from the Mediterranean

In the kitchen

Fresh in salad — the canonical use; pairs with fruit (apple, pear), good olive oil, lemon
Wilted on pizza (added after baking)
In pesto — alone or mixed with basil
In sandwiches, on sourdough, with cured meats
Stir-fried briefly with garlic

Sources

Eliot Coleman, The New Organic Grower
Salad Leaves For All Seasons (Joy Larkcom)

Rooted in life.

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