Parsley Petroselinum crispum

Reviewed June 2026 · how we check this

A hardy biennial culinary herb grown as an annual for its fresh, clean-flavored leaves — both the ruffled curly type and the bolder flat-leaf (Italian) type. Slow to germinate but generously productive, cold-tolerant, and happy in gardens, containers, and bright windowsills alike.

Light

Parsley grows best in full sun — about 6 hours of direct light a day — but it's more shade-tolerant than most herbs and will produce a respectable harvest in 4 hours or partial shade, which actually helps it last through hot summers. In intense heat, a little afternoon shade keeps leaves tender and slows bolting. Indoors it needs the brightest window you have, ideally south-facing; without enough light it grows thin, pale, and leggy and the flavor weakens. Through dim winter months a grow light positioned a few inches above the pot for 12–14 hours a day keeps a windowsill plant compact and productive.

Watering

Keep parsley's soil consistently and evenly moist — it has a long taproot and resents both drought and waterlogging. Water deeply at the base whenever the top inch of soil begins to dry, aiming for steady moisture rather than soggy ground. Drying out repeatedly stresses the plant, encourages bolting, and toughens the leaves, while soggy soil invites root rot. Containers dry fast and may need watering every day or two in summer heat, so check them often. Mulching outdoor plantings conserves moisture and steadies soil temperature. Morning watering at soil level keeps foliage dry and discourages leaf disease.

Soil & potting

Parsley thrives in rich, deep, well-drained soil amended with compost, at a slightly acidic to neutral pH of 6.0–7.0. Because it forms a long taproot, loosen the bed deeply and clear stones so the root can grow straight; rocky or compacted ground produces stunted plants. In containers, choose a pot at least 8–10 inches deep with drainage holes and fill with a quality potting mix, since the taproot needs vertical room. Fertile, moisture-retentive soil rewards parsley with the lush, continuous leaf growth that makes for a long harvest.

Humidity & temperature

Parsley is a cool-season herb that does its best growing in the moderate range of 50–75°F and tolerates light frost — flavor often sweetens after a chill. It's hardy enough to overwinter in Zones 4–9, where it returns the next spring before bolting to seed in its second year. Average household humidity suits it indoors. Sustained heat above about 80°F stresses the plant and pushes it to bolt, so spring and fall are prime growing windows in hot climates. Give plants spacing for airflow to reduce leaf-spot disease, and shelter tender seedlings from hard late freezes.

Fertilizing

Parsley is a light-to-moderate feeder that responds well to steady nourishment for leafy growth. Work compost into the bed at planting, then feed every 3–4 weeks during the growing season with a balanced liquid fertilizer at half strength, leaning lightly toward nitrogen for lush foliage. Container plants need feeding more often, roughly every two weeks, because frequent watering washes nutrients out of the mix. Don't overdo it — excess fertilizer pushes weak, watery growth and dilutes the herb's flavor. Consistent, modest feeding alongside regular harvesting keeps fresh leaves coming through a long season.

Pruning & maintenance

Harvest parsley by cutting whole outer stems at the base rather than shearing across the top — this is the secret to a long, productive plant. The plant grows from its center, so removing the oldest outer stems lets fresh growth keep emerging from the middle. Begin harvesting once a plant has several full stems, and cut regularly; frequent harvesting keeps it bushy and tender. In the second year, parsley sends up a flower stalk and goes to seed — pinch off this bolting stem to extend leaf production a little, though once it bolts in earnest, flavor declines and it's time to replace the plant.

Propagation

Parsley is grown from seed, but the seed is famously slow and erratic to germinate, often taking 3–4 weeks. Speed it up by soaking the seed in warm water overnight before sowing. Sow seed 1/4 inch deep in moist seed-starting mix kept around 65–70°F, and keep it consistently damp until sprouts appear. Start indoors 6–8 weeks before the last frost, or direct-sow outdoors in early spring as soon as the soil can be worked, since parsley tolerates cool conditions. Because of the long taproot, transplant young seedlings carefully to avoid disturbing the root, or sow directly where plants will grow.

Common problems

Parsley turning yellowUsually overwatering or poor drainage — check the soil and roots first.→Parsley bolting (going to seed)Triggered by heat, age, or stress — the plant flowers and leaves turn bitter.→

Through the year

Spring

Prime planting time — direct-sow or transplant seedlings as soon as soil can be worked, since parsley shrugs off cool weather; soak seed first to speed germination.

Summer

Harvest outer stems often, water evenly, and give afternoon shade in hot climates to keep leaves tender and slow bolting.

Fall

A second strong season in cool weather — keep harvesting, as light frost sweetens the flavor; mulch plants in mild zones to overwinter.

Winter

Overwinters outdoors in Zones 4–9 under mulch, or grow indoors in a bright window under supplemental light for a steady kitchen supply.

Companion planting

Classic companions: tomatoes, asparagus, peppers, and roses; its flowers attract beneficial insects, but keep it away from lettuce and mint.

Recommended supplies for Parsley

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