The surroundings of the museum is a natural garden called Bunkaen Garden, where visitors can enjoy the following flowers throughout four seasons of the year: plum-grove (around in February and March), Miharu cherry trees (early in April), Lilium japonicum (around in May), Japanese hydrangea (from June to July), cotton rosemallow (September), bush clover (around in November), Christmas camellia (around in December), Chimonanthus praecox and common camellia (January to February).
美術館の周囲は文華苑とよばれる自然園になっており、梅林（2、3月ごろ）、三春の瀧桜（4月上旬）、ササユリ（5月頃）、アジサイ（6～7月）、スイフヨウ（9月）、萩（11月頃）、サザンカ（12月頃）、ロウバイ、椿（1月～2月頃）と、四季を通じての花が楽しめる。