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This English selection of a California native woody-based shrublet, shows off a bevy of small, clear yellow, tubular blooms (apparently made for hummingbirds) on spikes above bright green, needle-like leaves. Spring and summer bloom. Airy and exhilarating! Evergreen; 2' x 2'. Needs well-draining soil! (Mersea is an island off the east coast of England and is pronounced "mercy," having its roots in that word.)Minimum temperature: -20° F