Tiny microscopic Seeds from Corkscrew Rush Juncus filiformis, Spiralis. Seeds are tiny. Ideal for water gardens. This curious rush is considered one of the curliest rushed with round and twisted 6″-8″ foliage. Great for borders or in single pots. Prefers full sun to part shade; moist to wet soil; protect in hot climates by providing shallow water. Hardy in zones 4-10. These seeds are very small and need to be sown on the top of good seed starting soil and kept moist.