- You Will Get 100 Seeds Of Common Barley Hordeum Vulgare Grain Cover Crop Beer Grass Seeds. - Description: - Name: Common Barley. - Scientific Name: Hordeum Vulgare. - Color: Chartreuse (Yellow-Green). - Plant Seeds: After Danger Of Frost In Spring / Fall. - Plant Height: 24 - 36". - Plant Spacing: 3 - 6". - Bloom Time: Mid Spring - Early Summer. - Hardiness Zone: N/A (Annual / Winter Cover Crop. - Light Requirements: Sun. - Soil & Water Prefereces: Average (Tolerates Dryness Well).