Seeds are available in many distinct forms and sizes but will generally be rather plump and firm if they're viable. Some seeds have a difficult coat that has to break down naturally in the soil before germination can happen.
The two seats in the Scampston Walled Garden make the focal point without which this picture would be less interesting. I would have used two Adirondack seats painted a colour to complement the scene. This is the Perennial meadow in summer.