Dull gray-green color and wilted tips are indicative of chill injury; decay, tough texture, and loss of flavor can occur if stored at high temperatures. Store properly.
Tough spears may result if asparagus is exposed to ethylene gas. Store away from ethylene-producing fruits and ripening rooms.
Asparagus butt ends can dry out if humidity is too low; for best quality, maintain humidity level of 90-98%.