Sweet Rainbow was a strong and vibrant strain. They spread across pretty quickly, often denying water and nutrient resources to the native plants. We recommend spacing seeds about 4-6 apart.  Source: <a href=https://asifahmed.ca/overwintered-cattle-may-unfold-weed-seeds-ndsu-agriculture/>https://asifahmed.ca/overwintered-cattle-may-unfold-weed-seeds-ndsu-agriculture/</a>