White Clover

White clover (Trifolium repens) is a low-growing herbaceous perennial in the bean family that fixes atmospheric nitrogen through root nodules, enriching soil for subsequent crops. It spreads by creeping stolons, forming dense, weed-suppressing mats of trifoliate leaves topped with white globe flowers that attract pollinators. It tolerates mowing and light foot traffic, making it ideal for undersowing, cover cropping, pathways, and drive-rows. Both tall varieties such as 'Jura' and compact types such as 'Rivendel' are available as certified organic seed.

Growing

Broadcast or drill seed once soil reaches 5 °C. Rake the seedbed to a fine tilth and press seed into the top 0.5 cm of soil; firm with a roller or the back of a rake to ensure good soil contact. For undersowing in existing crops, broadcast at 1–2 g/m²; for dedicated cover-crop beds use 3–5 g/m². Inoculated seed establishes nitrogen fixation faster — if seed is not pre-inoculated, apply a Rhizobium leguminosarum inoculant to moist seed before sowing. No transplanting is necessary; direct sowing is the standard method.

Care

Keep seedbed moist until germination is complete, typically within 7–14 days. Once established, white clover is largely self-sufficient in rainfall; water only during extended dry spells. Mow or cut back to 5–8 cm when plants reach 15–20 cm to encourage dense, lateral spread and prevent excessive canopy. No supplementary nitrogen fertiliser is needed — the plant creates its own. Avoid high-phosphorus fertilisers which can reduce nodulation. Tall varieties may need cutting 2–3 times per growing period to stay manageable.

Harvest

For use as green manure, cut or turn the biomass into the soil once the canopy is lush and before significant flowering — this maximises nitrogen content. For forage or floral harvest, cut flower heads as they reach full white bloom before browning. The plant regrows vigorously after each cut and the harvest window extends throughout the warm growing period, typically 180 days or more in suitable conditions.

In the kitchen

Young white clover leaves and flower heads are edible raw in salads or steeped as herbal tea. Dried flower heads add mild, slightly sweet flavour to bread or grain dishes. Sprouts germinated from seed are tender and nutritious as microgreens.

Storing

Fresh flowers and young leaves keep for 2–3 days refrigerated in a sealed bag. Dried flower heads store for up to 12 months in an airtight container away from light and moisture. Seed retains viability for 2–3 years when stored cool and dry.