Bloom time: early summer till first frost light: full sun hardiness: zone 6. keep soil moist until established (usually 1 growing season). Mature plants are drought tolerant. Prune: In late winter/early spring to desired shape plant food: apply slow release once per year in early spring. Mulch keep a layer of mulch around the base of the plant year-round to conserve water and reduce weeds. Ideas or use: attractive flowering hedges or beautiful trees to line your driveway or fence, emerald empires are also perfect planted in decorative pots to place on your deck, porch or balcony.