Oatgrass Sprouting Seeds (NOT to TAS) Avena Sativa Selection from 200g to 2kg 1g = 25 seeds; For WA customers: Maximum 10kg permitted Oats Hulless are tender and very quick to sprout. These are a wonderfully tender grain with a mild sweetness. How to sprout Oat Seeds Soak 1/4 cup of grain in cool water for 6-12 hours. Drain off the soak water. Do not ever soak again. Rinse and Drain with cool water every 8-12 hours until your seeds show the tiniest root. Plant on a thoroughly moistened medium. Cover your crop with another tray or plate to keep light out and moisture in. Keep your medium moist by watering lightly as needed. Don't drench it! When your grass is 1-2 inches tall, remove the cover and move your crop to a well-lit location. Harvest when your Grass is 4-12 inches tall by cutting just above the medium with scissors or a sharp knife.