Spirea thunbergii 'Ogon' Pure white starburst flowers atop bright chartreuse willow-leaf foliage, among the earliest of the spring bloomers, ... Autumn/Winter Care: No pruning or maintenance needed. The confusing part is that if you snip off a piece of these branches they are still green inside. Replant the root sections and you’ll have new, vigorous growth when the plant re-emerges in the spring. For varieties of Spirea that bloom in spring, that will usually be late spring. Spiraea thunbergii 'Ogon' (Thunberg spiraea 'Ogon') will reach a height of 1.5m and a spread of 1.5m after 10-20 years. Save Spring canes can be cut right to the ground or trimmed back to any length to keep growth compact. Always in demand from landscapers and designers. Although 'Ogon' thrives when left to grow on its own recognizance, the shrub is smaller-scale and much more graceful when out of leaf if it receives some confident pruning each Spring. Please help us continue to provide you with our trusted how-to guides and videos for free by whitelisting wikiHow on your ad blocker. Summer flowering varieties bloom mostly on new wood from this year’s growth, so these are … How do I prune my old spiera shrubs? 3 ways to prune spirea. Thank you for contacting Toronto Master Gardeners. The exception would be to do renewal pruning, meaning cutting them to the ground as your friend suggests. How old the shrub is makes a difference, too. One of the basic elements of caring for a spirea shrub is pruning it when necessary. All tip submissions are carefully reviewed before being published. The specifics of how to do this will be covered in the next section. When pruning, remove 1/3rd of the oldest branches by cutting at the base of the shrub. How to handle it: The Basics. You can also use a commercial aphid spray. Deciduous shrub, erect to basally prostrate, to 3 ft (0.9 m) high, sparsely branched, cinnamon-brown scaly bark. Please consider making a contribution to wikiHow today. My question is whether I should prune off these branches now or wait a while longer. We had wanted to portray Spirea thunbergii ‘Ogon ‘ (a.k.a ‘Mellow Yellow’ ) in a blog post last spring, but there are always so many plants vying for our attention at that time of year. You won’t kill a spirea by pruning it! This removes the dead blossoms and also may trigger a second blooming and new leaf growth. Monitor for pests, diseases or other ailments on a regular basis. Your Spiraea bumalda blooms on new wood so you are correct pruning in the spring. One third of all the woody old trunks should be pruned right back to ground level. Scrape away some soil around the root if necessary. This is best done in late winter or early spring while your plants are dormant. 14 more photos VIEW GALLERY. Give your plant a good watering the day before you plan to divide it. 5.1 General tips for a good spiraea pruning. Summer-blooming spireas generally respond well to severe rejuvenation pruning in spring when the buds are swelling. When pruning shrubs it is important know if it blooms on old wood from the previous year or new growth in the spring. Regular trimming increases reddish-bronze new shoots in spring, light greenish-yellow leaves in summer and bright pink blooms in summer and fall. They are still alive but getting leggy. Please consider making a contribution to wikiHow today. Covered in masses of white flowers in spring its beauty is when it is left to take its natural form, so give it a little space. Spring flowering varieties bloom on old growth from the previous year and need to be pruned right after flowering. (At the worst, it might not bloom for a year). % of people told us that this article helped them. Spiraea billardi should receive a hard pruning regime in early spring. Each piece should have a healthy bit of root and above-ground growth. These shrubs tend to bloom in the spring and summer months, though some varieties will also produce attractive leaf displays in the fall. The first group's dwarf spirea bloom in … You should also add around two inches of compost, leaf mold or well-rotted manure around your spirea to act as a mulch. Amid the current public health and economic crises, when the world is shifting dramatically and we are all learning and adapting to changes in daily life, people need wikiHow more than ever. You should actually prune your spirea more than once a year, at least twice. Pruning Dwarf Spirea. Best of all, it was VERY concise and clear. You'll lose a year's bloom period. If your spirea bloom in the spring, They are likely Spiraea prunifolia or Spiraea x vanhouttei and they bloom on "old wood" or the previous year's growth.These should be cut back after blooming in 2016. 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