Ideally, a hibiscus should be pruned in the spring. If hibiscus get sun, they will regrow very quickly from pruning, and your hibiscus will be ready to burst into bloom as soon as you put them back outside in the spring. The hardy hibiscus is a cold hardy plant despite bearing large blooms that call to mind the tropics. Some hibiscus will never need more than a light pruning. comes in both hardy, deciduous varieties and evergreen, tropical types. A stray branch can be pruned any time of year. Favoured by garden lovers for its vibrant colours and easy-care nature, hibiscus brings a cheerful touch to any garden. 18. The Rose of Sharon is also a hibiscus (Hibiscus syriacus) hardy in zones 4 or 5 through 8 or 9. Some hibiscus will never need more than a light pruning. Plants suitable for this pruning: Buddleja (butterfly bush) Fuchsia (hardy fuchsias) Hibiscus; Hydrangea paniculata; Spirea japonica; More details on pruning summer-flowering shrubs. Spent flowers can be removed to keep plants tidy, but is not necessary. 'Perfect Storm' rose mallow is a hybrid cultivar of Hibiscus moscheutos, known commonly as the hardy hibiscus plant.It is part of Proven Winners' Summerific series. The hardy hibiscus, or Hibiscus moscheutos, is a beautiful perennial with blossoms that range from 3 to 10 inches in diameter. If you want a hibiscus that you can prune into a tree shape, then ‘Blueberry Smoothie’ might be the one for you. Perennial hibiscus have big, disc-shaped, hollyhock-like flowers that can be 6 to 12 inches across. The plant, which can reach a height of 3 to 6 feet, comes in colors such as pink, raspberry, mauve, dusty rose and white. Tom Bruton Saturday Jul 11, 2009 at 12:01 AM. Let’s look at when to prune hibiscus and the best techniques when pruning hibiscus plants. Remove any dead branches. Hibiscus (Hibiscus spp.) If hibiscus get sun, they will regrow very quickly from pruning, and your hibiscus will be ready to burst into bloom as soon as you put them back outside in the spring. Perfect Storm is a relatively recent cultivar that is a compact version of the popular 'Summer Storm' hibiscus. The rose mallows are herbaceous perennial plants that completely die back to the ground each winter, while rose of Sharon is a small deciduous shrub. Blueberry Smoothie. I had to wait until early July one season, so be patient. Pruning a Hardy Hibiscus Hardy hibiscus are amazing plants. Hardy Hibiscus is slow to emerge in cold springs or early summers, so be patient. The Hardy Hibiscus is the result of hybridizing our own little-known North American native wildflower shrubs, the tall wild hibiscus species, mostly one called Hibiscus moscheutos. Early spring is the right time to prune your hardy hibiscus—they are adaptable to pruning into whatever shape or form you desire as long as you don’t cut off too much of its foliage and branches. It also rejuvenates the plants after their long winter nap while encouraging them to maintain an attractive appearance and healthy, vigorous growth. The perennial hardy hibiscus (Hibiscus coccineus and Hibiscus moscheutos) die back to the ground each winter and send up new growth in spring.