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Sainfoin

Onobrychis viciifolia
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Onobrychis viciifolia (Sainfoin) — botanical photograph
Pl. 43F3 — Onobrychis viciifolia
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Overview

Sainfoin, scientifically known as Onobrychis viciifolia, is a perennial forb or herb native to the Balkan region and parts of Central Europe, including Austria, Bulgaria, Czechoslovakia, France, Greece, Hungary, Romania, and Yugoslavia. This plant thrives in full sun and prefers moist, light (sandy) to medium soil with a pH range of 6 to 8.5, making it adaptable to various growing conditions. Sainfoin can grow up to one meter tall and is known for its edible leaves, which can be eaten raw or cooked and are often used in salads for their mild flavor. Its ability to fix nitrogen in the soil makes it valuable as a soil conditioner and for erosion control, while also serving as a nitrogen-fixer in agricultural settings. Sainfoin has been introduced to numerous regions, including Albania, Algeria, Belarus, Belgium, Bolivia, California, and many others, expanding its utility as a forage plant and ornamental addition to gardens. Its seeds, weighing approximately 17.8 grams per 1000 seeds, are commonly used for propagation. While primarily valued for its edible and soil-improving properties, sainfoin also plays a role in erosion control and as a nitrogen-fixing plant, enhancing the fertility of the soil. Cultivation of sainfoin is straightforward, with seeds or divisions being the preferred methods for propagation. It thrives in USDA hardiness zones 5 to 9, making it suitable for temperate climates. The plant's distinctive feature is its ability to fix nitrogen, which not only benefits the soil but also supports the growth of other plants in the vicinity. While sainfoin is not typically used for medicinal purposes, its importance in agriculture and horticulture makes it a valuable addition to both gardens and fields.

Quick answers

What is Sainfoin?

Sainfoin, scientifically known as Onobrychis viciifolia, is a perennial forb or herb native to the Balkan region and parts of Central Europe, including Austria, Bulgaria, Czechoslovakia, France, Greece, Hungary, Romania, and Yugoslavia.

Growingconditions · propagation · uses
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Cultivation

Sainfoin thrives in full sun and prefers moist, well-draining soils with a pH between 6 and 8.5. It is hardy in temperate regions from USDA zones 5 to 9 and can grow up to 1 meter tall as a perennial forb/herb. For propagation, seeds or divisions can be used. Harvest the edible leaves for use in cooking.
Light
Full sun
Water
Moist
Soil
Light (sandy), Medium
Hardiness
5-9
Life cycle
Perennial
Habit
Forb/herb
Mature size
1.0 m tall
Soil pH
6–8.5
For first-time growers

How to grow Sainfoin for the first time

8steps

Start with sainfoin as a simple, low-maintenance perennial for your garden.

  1. 1

    What you'll need

    A packet of seeds or young plants, a trowel, and mulch.

  2. 2

    Best time to plant

    Plant in spring after the last frost or in fall before the first freeze.

  3. 3

    Soil and container prep

    Ensure soil is well-draining with a pH between 6 and 8.5, and prepare containers at least 12 inches wide and deep.

  4. 4

    Sowing or transplanting

    Direct sow seeds 0.5 inches deep or plant young seedlings in the garden bed.

  5. 5

    First two weeks

    Keep soil moist but not waterlogged, and mulch to retain moisture and suppress weeds.

  6. 6

    Ongoing care

    Water regularly during dry spells, especially when leaves start to wilt. Prune dead or damaged growth as needed.

  7. 7

    Harvest or pruning

    Prune back after flowering to encourage new growth and maintain shape.

  8. 8

    Common mistakes

    Overwatering, planting in heavy soil, neglecting to mulch, not providing enough light, and failing to prune regularly.

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Edible & utility

Edible parts:Leaves
Edible uses: The leaves of sainfoin are edible and can be eaten raw or cooked. They are often used in salads for their mild flavor. The plant thrives in light, moist conditions with a soil pH between 6 and 8.5.
Other uses:Soil conditionerErosion controlNitrogen fixer
Contextrange · companions · related
VII

Distribution

8 native · 48 introduced
Distribution across4 continents· 8 native· 48 introduced
Europe20 regions
native (6)AustriaBulgariaFranceGreeceHungaryRomania
introduced (14)AlbaniaBelarusBelgiumDenmarkItalyNetherlandsPolandPortugalRussiaSpainSwedenSwitzerlandUkraineUnited Kingdom
Asia3 regions
introduced (3)ChinaTurkeyUzbekistan
Americas1 region
introduced (1)Bolivia
Africa3 regions
introduced (3)AlgeriaEritreaMorocco
Broader regions
native:Czechoslovakia, Yugoslavia
introduced:Baltic States, California, Colorado, Idaho, Illinois, Khabarovsk, Kirgizstan, Montana, Nevada, New Mexico, New South Wales, New York, Oregon, Primorye, Tadzhikistan, Tasmania, Vermont, Washington, Wisconsin
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Specimen gallery

1 image
Onobrychis viciifolia (Sainfoin) — botanical photograph
Sainfoin (Onobrychis viciifolia)
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Explore further

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