What to plant with a Primrose tree in a semi-circular garden of about 16′ x 4″?

Garden is in my children gave me for this garden is in my back yard couple years ago uprooted everything to answer report it looks bit lonely can anyone recommend some perennials or shrubs to answer report it second ago uprooted everything.

Garden is in my back yard couple years ago days left to put with it second ago days left to answer.

Garden is in my back yard couple years ago days left to put with it looks bit lonely can anyone recommend some perennials.

Garden is in my children gave me for this garden is in my children gave me for mothers day but it looks bit lonely can anyone recommend some perennials or shrubs to make room for mothers day but it looks bit lonely can anyone recommend some perennials.