Lepidium sativum (Garden Cress)
Lepidium sativum (Garden Cress)
Contents
Introduction & History
Garden Cress is the quickest herb from seed to plate — germinating in 24 hours and ready to harvest in under two weeks. This ancient peppery microgreen has been cultivated for at least 5,000 years, from Persian royal gardens to British egg-and-cress sandwiches. Its simplicity makes it the perfect first gardening project for children, while its intense, mustard-like bite gives it serious culinary credentials.
History & Origin
Native to western Asia, probably Persia (Iran), where it has been cultivated since at least 3000 BCE. Spread through ancient Egypt, Greece, and Rome. The Persians grew it as a salad green and medicinal herb, while the Romans brought it across Europe. In Britain, cress-and-egg sandwiches became a cultural institution. It remains widely grown in Iran, India, and the Middle East.
Botanical Description
Fast-growing annual reaching 30–60 cm if left to mature, but usually harvested as seedlings at 5–8 cm. Basal leaves are finely divided; stem leaves become simpler with age. The entire seedling has a characteristic curl. When allowed to mature, plants produce thin stems topped with small white or pinkish flowers in terminal racemes, followed by small, round, flattened seed pods.
Stem: Herbaceous • Height: 30 cm at maturity • Spread: 10 cm • Foliage: green • Flowers: white (summer)
Planting & Cultivation
Scatter seeds densely on moist paper towels, cotton wool, or shallow trays of compost. No covering needed. Keep moist and in light at 15–20°C. Seeds germinate within 24–48 hours. For garden growing, sow directly on the soil surface in rows 15 cm apart. Sow every 5–7 days for continuous supply. The simplest possible sowing technique — virtually foolproof.
| Sun exposure | Full Sun Partial Shade |
| Soil pH | 6.0-7.0 |
| Spacing | 10 cm |
| Seed depth | 3–6 mm (surface-sow if light-dependent germinator) |
| Water needs | Moderate |
| Soil type | Well-drained, humus-rich loam; add perlite or grit for drainage |
Cultivation Details
Almost no cultivation required for microgreen use — just moisture, light, and 7–14 days. For mature plants, grow in any reasonable garden soil in full sun to partial shade. Keep well-watered; dry conditions cause bitterness and rapid bolting. Can be grown year-round indoors on a windowsill. The speed from sowing to harvest is its greatest feature.
Climate & Hardiness
Grows in virtually any climate as a microgreen (indoors, temperature-controlled). Outdoors, it tolerates light frost to about −5°C. Prefers cool weather (10–20°C); bolts rapidly in heat above 25°C. In hot climates, grow as a winter crop or exclusively indoors. USDA zones 2–11 — the wide range reflects its adaptability and speed.
USDA zones: 3-11
Minimum temperature: -10°C
Indoor growing: Suitable for windowsill culture with 6+ hours light
Seasonal Care
Year-round indoor production on windowsills. Outdoors — spring: sow in succession every week. Summer: move to shade or grow indoors only. Autumn: resume outdoor sowing. Winter: windowsill cress trays are a staple. No seasonal care is needed since individual plants last only 2 weeks before being replaced by the next sowing.
Propagation
Exclusively by seed. Seeds are cheap, abundant, and germinate almost instantly. A single packet provides months of harvests. Seeds remain viable for 2–3 years when stored dry. No need to save seed — it is commercially available everywhere and inexpensive. Self-sows if allowed to flower, but this is rarely desired.
| Method | Success rate | Time | Notes |
|---|---|---|---|
| Direct sowing | 85–95% | 7–21 days | Sow after last frost, 3–6 mm deep |
| Indoor start | 90–98% | 6–8 weeks early | Use seed trays, transplant after hardening off |
| Succession sowing | — | Every 3–4 weeks | Ensures continuous harvest all season |
Diseases & Pests
Almost none at the microgreen stage due to the extremely short growing cycle. Damping off (fungal) can occur in overly wet, poorly ventilated conditions — ensure air circulation and avoid waterlogging. At the mature plant stage, flea beetles and aphids are possible but rarely encountered since harvest happens before pests establish.
Culinary Uses
The quintessential British egg-and-cress sandwich — tiny peppery sprouts on buttered white bread with egg. Garnish for soups, scrambled eggs, and canapés. In Iranian cuisine (shaahi), it accompanies kebabs and rice dishes as a fresh herb. Indian dishes use the seeds (halim) in drinks and sweets. The peppery, mustard-like bite complements cream cheese, smoked salmon, and mild cheeses.
| Category | Pairing suggestions |
|---|---|
| Poultry | Chicken, turkey, duck |
| Fish | White fish, salmon, prawns |
| Vegetables | Tomatoes, courgettes, aubergine |
| Dairy | Soft cheeses, butter, cream sauces |
Medicinal & Aromatherapy
Rich in iron, vitamin C, folic acid, and vitamin A. Traditionally used in Ayurvedic and Persian medicine for anaemia, digestive issues, and respiratory complaints. Cress seed drinks (halim water) are consumed in India and the Middle East for their purported health benefits. The seeds are mucilaginous when soaked, used in traditional drinks and poultices.
| Compound | Properties |
|---|---|
| myrcene | herbaceous, earthy |
| linalool | floral |
| geraniol | rose-like |
| citral | lemony |
| apigenin | mild sedative flavonoid |
Container & Companion Growing
Container Growing
The ultimate container herb. Grows on damp kitchen paper, cotton pads, shallow trays, or any small container. No soil needed for microgreen production. For slightly larger harvests, use seed trays with 2–3 cm of potting mix. Perfect for kitchen windowsills, classroom projects, and apartment gardening. Sow fresh trays every 5–7 days.
• Minimum pot size: 20–25 cm Ø, 5 L+
• Shallow roots; frequent watering needed
• Use free-draining potting compost with 20–30% perlite or grit
• Ensure drainage holes; stand on pot feet to prevent waterlogging
• Feed with dilute liquid fertiliser (half-strength) every 2–3 weeks in growing season
• Indoor: Place on brightest windowsill (south-facing ideal); supplement with grow lights in winter
Companion Planting
Useful as a rapid-growing marker crop when sown alongside slow-germinating herbs like parsley or Sweet Cicely. The cress emerges in 1–2 days, marking the rows. In garden beds, interplant between slow-growing crops. Too short-lived to provide meaningful companion planting benefits, but its rapid turnover means it never competes.
| ✓ Good companions | Tomatoes, Peppers, Strawberries, Carrots |
| ✗ Avoid planting with | Fennel, Rue |
Common Mistakes to Avoid
Letting the growing medium dry out even once — cress seeds need constant moisture. Sowing too thickly in poorly ventilated trays, causing mould. Trying to preserve or store harvested cress instead of eating it immediately. Over-thinking it — cress is the simplest possible crop to grow.
Harvesting & Preservation
Harvest microgreens at 5–8 cm (7–10 days after sowing) by cutting with scissors just above the base. Use immediately — cress wilts within hours of cutting. Does not store, dry, or freeze well. The key is continuous sowing rather than preservation. If allowed to mature, leaves become coarser and more peppery but still usable.
• Time of day: Early morning, after dew has evaporated but before intense midday heat volatilises essential oils
• Growth stage: Just before flowering, when essential oil concentration peaks. Once flowers open, the plant redirects energy from leaf production
• Season: Year-Round
• Part harvested: Sprouts, Leaves
• Harvest rule: Never remove more than ⅓ of the plant at once; this ensures continued vigorous regrowth
• Technique: Cut stems cleanly above a leaf node with sharp scissors or secateurs. Tearing damages tissue and invites disease
| Method | Process | Shelf life | Best for |
|---|---|---|---|
| Air drying | Tie bundles, hang upside down in warm, dark, airy space | 6–12 months | Most herbs |
| Oven / dehydrator | Spread on trays, 35–45°C until crisp | 6–12 months | Fleshy-leaved herbs |
| Freezing (whole) | Blanch 5s, ice bath, pat dry, freeze flat on tray | 6 months | Basil, chives, parsley |
| Freezing (oil cubes) | Chop fine, pack into ice cube tray, cover with olive oil | 6 months | Any culinary herb |
| Herb salt | Layer herb and coarse salt 1:4, dry and grind | 12+ months | Rosemary, thyme, sage |
| Infused vinegar | Pack jar, cover with warm vinegar, steep 2–4 weeks | 6 months | Tarragon, dill, basil |
| Infused oil | Fill jar with dried herb, cover with oil, steep 4–6 weeks | 3–6 months | Rosemary, thyme, chilli |
Frequently Asked Questions
Do I need soil to grow cress?
No — cress grows perfectly on damp cotton wool, kitchen paper, or even a wet flannel. For slightly larger plants, a shallow tray of compost works, but soil-free methods are the classic approach, especially for windowsill growing.
Why did my cress go mouldy?
Mould appears when there's too much moisture and too little air circulation. Don't seal trays with cling film, keep them in a ventilated spot, and avoid waterlogging the growing medium.
Is garden cress the same as watercress?
No — garden cress (Lepidium sativum) is a different species from watercress (Nasturtium officinale). They share a peppery taste but garden cress is grown in soil or on paper, while watercress grows in running water.
Seasonal Care Calendar
🌱 Spring (Mar–May)
Water: Heavy
Feeding: No feeding
☀️ Summer (Jun–Aug)
Water: Heavy
Feeding: No feeding
🍂 Autumn (Sep–Nov)
Water: Regular
Feeding: No feeding
❄️ Winter (Dec–Feb)
Water: Regular
Feeding: No feeding
The fastest herb from seed to plate — germinating in 24 hours, harvestable in 7–14 days. Grows on damp paper without soil. Peppery, mustard-like flavour essential to British egg-and-cress sandwiches. Virtually foolproof, perfect for children and indoor growing. Sow weekly for continuous supply.
Quick Reference: Lepidium sativum
Key Principles: Right location, well-drained soil, regular harvesting to promote growth, and appropriate winter protection for tender species.