Seeding rates for various mixtures are indicated in the table. Seed should be covered slightly or planted inch deep. Birdsfoot trefoil, like all legumes, should be treated before planting with the proper strain of Rhizobium bacteria that will fix atmospheric nitrogen. This nitrogen eliminates the need for using fertilizer nitrogen. Even inoculum for other trefoil species will not effectively nodulate birdsfoot trefoil.
Planting can take place in the early spring or late summer.
Early spring planting is preferable because of ample soil moisture for germination and seedling development. Fertility and pH Requirements One of the major advantages of birdsfoot trefoil is its tolerance to low fertility and to low soil pH. However, maximum forage growth will occur on fertile soils with a pH of 6.0 to 6.2. A moderate application of phosphorus and sulfur at planting based on soil test data, will provide for good growth. Management Early spring or continuous grazing of birdsfoot trefoil will weaken and eliminate a stand. Rotational grazing should be used, allowing animals to graze when the first flowers appear.