The first blank requires a verb indicating the action of the flowers, which is 'bloom'. The second blank is a partial word 'b ___ ___ m s', which completes to 'blooms', referring to the flowers themselves. The third blank requires a noun that the garden is compared to; based on the context comparing the garden to a painting ('garden as a painting', 'plot as canvas'), the appropriate word is 'painting' (or 'work of art').