Dried stems are a beautiful and natural feature in your home and can last 2+ years when kept in optimal condition.
Caring for them is relatively effortless, when the grasses arrive with you they may be slightly compressed so, carefully remove them from the packaging and place them upright in a dry, suitable vase allowing them some time to open up.
Some shedding is likely to occur, therefore, a gentle fluffing (ideally outside) and a light spray of hairspray can help reduce this. Ensuring to hold the hairspray a couple of feet away from the stems to reduce further shedding.
Keeping any dried stems away from water and direct sunlight will preserve them for longer and prevent fading.