Callistemon - 'Little John' - Dwarf Bottlebrush one (1) Callistemon - 'Little John' - Dwarf Bottlebrush plant. This compact shrub is not your typical bottlebrush. It's grey to blue-green foliage is beautifully contrasted by showy, dark red flowers. Perfect as a potted specimen or for use as a middle-of-the-border accent plant. Heavy blooms in spring and summer are a magnet for hummingbirds. These 4"+ plants come in 2.5" x 2.5" x 3.5" deep pots. Cultivation For use a landscape plant or potted specimen. Full to partial sun. Low water requirements once established. Compact, slow growth to 3' tall by up to 5' wide. Growth habit: round. Hardy in zones 8-11.