Do not remove the tying ribbon as no further arranging is necessary.
On arrival unwrap flowers removing the wet pack and any water vials hydrangeas will always travel in water tubes for optimum freshness, ideally cut 2cms off the stems at an angle and place in a vase of room temperature water with a quarter of the flower food additive mixed into the water.
Should a bloom start to soften simply wet the bloom head and recut the stems before placing back in the vase of fresh water and flower food
Flowers will last longer if you change the water and trim the stems every 2 days. Don’t let any leaves touch the water and remove floating foliage to keep their environment bacteria free.