How to Grow Restharrow
Restharrow
Ononis repens
herbRestharrow is a perennial herb native to Europe with small pink or purple flowers and a creeping growth habit. Historically used in traditional medicine and as a diuretic, it was also used to make a beverage similar to tea. The plant is drought-tolerant and attracts pollinators, making it valuable for naturalistic gardens and wildflower areas.
When should you plant Restharrow in your zone?
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Example Restharrow timeline · Pittsburgh, PA (Zone 6b)
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Plant Restharrow
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Restharrow
Around Jul 16≈ 90 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Restharrow dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 4-9, with excellent drought tolerance once established
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Seed Germination
10-14 daysTiny seedlings emerge with cotyledons visible; plant is very small and vulnerable
Keep soil consistently moist but not waterlogged. Provide light (cold stratification may improve germination rates). Protect from slugs and snails
Seedling & Establishment
3-4 weeksFirst true leaves appear; plant develops shallow root system and establishes leaf structure
Thin seedlings to 18-24 inches apart. Continue consistent moisture. Avoid transplanting stress if possible; direct seeding is preferred
Vegetative Growth
6-8 weeksPlant develops creeping stems with oval leaves; forms spreading mat of foliage before flowering
Establish deep watering schedule to encourage long taproot development. Gradually reduce watering frequency. No fertilizer needed; thrives in lean soil
Flowering
8-12 weeks (May-September in most zones)Small pink, purple, or occasionally white flowers appear along stems; blooms attract bees and butterflies
Allow flowers to remain for pollinator benefit and seed production. Deadhead selectively if you want to extend bloom period without self-seeding
Seed Production & Dormancy
3-4 weeks to seed maturity; dormancy through winterFlowers fade; small seed pods develop. Plant may die back partially in winter or remain semi-evergreen depending on zone
Allow some flowers to set seed for natural regeneration. Cut back dead growth in spring. Plant will re-emerge from established taproot
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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and
Copper barriers, diatomaceous earth, handpicking at night; protect young seedlings especially
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Strong water spray, insecticidal soap, or introduce ladybugs; rarely problematic on established plants
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Improve drainage immediately; reduce watering; ensure soil is well-draining before planting
Uses
Herbal infusions & traditional remedy
MedicinalRestharrow has been used for centuries in European folk medicine as a diuretic tea to support urinary and kidney health. The herb is still used in some herbal traditions for its purported anti-inflammatory properties. [source]
Herbal beverage
CulinaryThe plant has been used historically to brew a weak tea-like beverage with a slightly bitter, herbaceous flavor. Modern use is less common but it remains in some herbal tea blends. [source]
Pollinator and beneficial insect support
WildlifeRestharrow flowers attract bees, butterflies, and hoverflies, making it valuable for gardens designed to support pollinators. The plant provides nectar throughout a long flowering season. [source]
Drought-tolerant ornamental groundcover
HouseholdIts low-growing, spreading habit and delicate pink flowers make restharrow attractive in rock gardens, xeriscapes, and Mediterranean-style plantings. It requires minimal maintenance once established. [source]
Natural dye plant
CraftThe flowering aerial parts have been explored as a source for natural plant dyes in some traditional textile practices, though it is not a major dye plant. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
For medicinal herbal tea or extract, harvest aerial parts (stems and leaves) after flowering begins, typically mid-to-late summer. Cut stems in morning after dew dries. Dry completely before storage. For seed collection, allow flower heads to dry on plant, then cut and collect seeds in late summer/early fall. The plant's deep taproot is difficult to harvest intact.
Fun Facts
- 🌱 Restharrow's name comes from medieval farming practices: the plant's deep, tough taproot would literally stop and 'rest' the plow (harrow) during plowing, making it an infamously persistent 'weed' in cultivated fields across Europe.
- 🌱 The plant has a remarkable taproot that can extend several feet deep into the soil, allowing it to access water deep underground and survive extended drought periods—a characteristic that also makes it difficult to eradicate once established.
- 🌱 Historically, restharrow was sufficiently common in European grain fields that it became incorporated into folklore and traditional medicine, with different regions developing their own herbal preparations and folk remedies.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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