FLOWERING SHRUB. The favourite variety is Kerria japonica Flore pleno, giving a plentiful show of double rosettes of orange-hued blossom in May. It is bushy but not woody, not particular as to soil and best planted in autumn. Ideal against a wall as growth is somewhat sprawling. Height in the open about 5 ft., rather taller on a wall. All therequired is to prevent overcrowding. Increase by detaching suckers in autumn.