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.