The flowers remind the person of the funeral home, particularly roses. Second, flowers die and wilt away, further reminding the person of the death process. Buying planters may not be a good idea, either, as the person may not want to care for them. Buy a book of poems, from Helen Steiner Rice or another known author. Be SURE and read the poems in the bookstore to ensure they are comforting.
Christian bookstores have wonderful selections.
Design your own card, with simple flowers. Ideals Magazine has beautiful, large glossy pages of flowers, Victorian type pictures, country scenes, and other peaceful illustrations, with poetry. Check out similar magazines to see if there is something the person may like to peruse in their quiet, lonely times. Make a special craft to accompany it, if you can. It may be better to have a light hearted approach.