Sub clover: complete guide

Overview

Sub clover (Trifolium subterraneum), also known as Subterranean clover, is a unique annual legume from the Fabaceae family. Native from Europe through the Caucasus to Iran, this remarkable plant has adapted to develop seeds underground, making it perfectly suited for grazed pastures and meadows.

Appearance and Bloom

Sub clover grows as a low, spreading plant reaching approximately 30 centimeters tall. Leaves are trifoliate, typical for clovers. Small white flowers appear from May through August. The characteristic feature is seed pods developing and burrowing underground.

Ideal Location

This plant thrives in full sun to partial shade. Position in sunny locations receiving minimum 6 hours of sunlight. Sub clover grows excellently in open meadows. Storm protection is not necessary.

Soil

Sub clover grows on soils with pH 5.0-8.0. Preference for well-drained soils. The plant accepts various soil types including sand, clay, and loam. Poor soils are well tolerated.

Watering

Water regularly after sowing until germination. Mature plants are very drought tolerant and need minimal water. During extremely dry periods, monthly watering suffices. Avoid excess moisture.

Pruning

Sub clover requires no maintenance. The plant dies after seed set. Seeds can remain for natural self-sowing next season. Mature plants can be removed.

Maintenance Calendar

May-June: Flowering begins, insect visitation. July-August: Seed development underground. September: Plant dies. October-April: Seeds dormant.

Winter Hardiness

Sub clover is extremely cold tolerant and grows in all temperate climates. It can overwinter as seed and regrow in spring.

Companion Plants

Grows well in pasture mixes with grasses and other clover species. Combine for forage value and biodiversity benefits.

Conclusion

Sub clover is valuable for meadows and natural land management. This plant helps nitrogen fixation in soils. Purchase seed from garden centers for pasture restoration projects.

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