They are easy to grow. Drought tolerant once established. A great friend to our planet's pollinators. Seeds are easy to harvest and save for future planting. And did I mention how gorgeous they are? They prefer full sun and should be watered daily until established. Recommended spacing for each seed bomb is 1 ft.! Six seed bombs per recyclable clamshell. Each seed bomb measures approximately 1.25 inches. Clamshell measures 4.5x3.5x1.5 inches. Each seed bomb is made with post-consumer paper and hand-selected, high-quality, non-GMO seeds. The seeds are protected by the paper and only need to be placed on top of the soil, not covered by soil, but can definitely be covered if needed.