Valuable soil-improvement crop. Vigorous legume produces huge amounts of nitrogen-rich biomass for turning under. Can be planted in the spring through late summer. Late summer (late August early September) planted vetch will winter over, growing vigorously the following spring. Can be mixed with oats or rye for maximum weed competition. Hardy; will also sprout in the spring if planted before the ground freezes in November (like winter rye). Demands fairly fertile soil and adequate rainfall as is shallow-rooted. Livestock caution: Seeds are poisonous. Planting rate: 1 lb per 1,000 sq ft; 40 lbs per acre.