How to grow parsley
Overview
Parsley (Petroselinum crispum) is a biennial herb from the Apiaceae family, grown for its fresh, mildly peppery leaves. It is a staple in kitchen gardens, valued for continuous harvests rather than short-lived display.
Varieties
- Italian flat-leaf — The standard culinary variety with stronger flavour and easier harvest than curly types.
- Curly parsley — Ornamental and milder, often used as a garnish; more frost-tolerant than flat-leaf.
- Hamburg — Grown for its edible, parsnip-like root; less common but productive in cool climates.
Soil Preparation
Parsley prefers rich, loamy soil with a pH of 6.0–7.0. Add well-rotted compost before planting to improve moisture retention. Ensure good drainage; heavy clay soils need raised beds or mounding.
Growing Guide
Sow parsley seed 6 mm deep in moist, well-drained soil, spacing 20 cm apart. Germination is slow (3–4 weeks); soak seeds overnight to speed it up. Plant in full sun with afternoon shade in hot zones. Keep soil consistently damp but not waterlogged. Thin to 15 cm apart once true leaves appear.
Sowing
Sow seeds 6 mm deep, 2–3 per spot, in rows 20 cm apart. Germination takes 2–4 weeks; pre-soak seeds in warm water for 24 hours to speed it up. Direct sow is best, as parsley dislikes root disturbance.
Care
Feed parsley every 4–6 weeks with a balanced liquid fertiliser or apply slow-release pellets at planting and mid-season. Trim flower stalks as they appear to prevent bolting. Remove yellowing leaves to keep plants productive.
Companion Planting
Parsley thrives near tomatoes, asparagus, and roses, repelling some pests. Avoid planting near carrots or celery, as they share diseases and compete for nutrients. Dill can cross-pollinate with parsley, so keep them separate.
Common Pests & Risks
Aphids and caterpillars (especially parsley swallowtail) are common. Spray aphids with neem oil or a strong water jet; hand-pick caterpillars. Slugs and snails may attack young seedlings in damp weather.
Harvesting
Harvest outer stems from the base once the plant has at least 6–8 mature leaves. Cut regularly to encourage new growth; remove flower stalks promptly to extend leaf production. Parsley is ready for first harvest 8–10 weeks after sowing.
In the Kitchen
Harvest leaves fresh for salads, sauces, and garnishes; flat-leaf has better flavour. Store in a jar of water in the fridge for up to a week. Freeze chopped leaves in ice cubes for long-term use.
Troubleshooting
Yellow leaves: overwatering or poor drainage; reduce water and improve soil. Brown leaf edges: underwatering or hot sun; mulch and increase watering. Slow germination: old seed or cold soil; soak seeds and wait for warmer weather. Bolting: heat or stress; cut flower stalks and provide shade. Leggy growth: insufficient light; move to full sun.