Grassy Arrowhead (Sagittaria graminea) Grassy Arrowhead (Sagittaria graminea) Native RangeWetland WildflowerBlooms: April - NovemberHabitat: Grassy Arrowhead prefers full to partial sun and wet conditions. Look for Grassy Arrowhead in shallow water or mud in ditches, marshes, streams, lakes, and ponds. Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook