Leaning on the scarcity and so the value of silver, is that the twenty-fifth wedding anniversary, or Silver Anniversary [1] is symbolic of how the wedded couple has reached a stage in their relationship where it is rare to have been together for longer than most. Either that or that regardless of when the couple married, even if very young, they are sure to have a lot of grey hairs on their heads or (in the case of men of course) lost them all.
What flowers to give on the twenty-fifth (25) wedding anniversary?

