A shrub covered in blooms can make a small courtyard, rental garden or backyard feel properly finished. But prune flowering shrubs at the wrong time and you can remove the very buds you were waiting for. The good news is that timing is less complicated than it sounds once you know whether your plant flowers on old wood or new growth.<\/p>\n
For Perth gardeners, pruning also has to work around long dry summers, mild winters and the occasional burst of enthusiastic spring growth. A clean, well-timed trim keeps plants compact, healthier and easier to live with. It also gives you a better-looking garden without needing to replace mature plants every few years.<\/p>\n
The rule that matters most is simple: prune spring-flowering shrubs after they finish flowering, and prune summer-flowering shrubs in late winter or early spring before their new season growth takes off.<\/p>\n
Spring-flowering shrubs set many of their flower buds on growth made during the previous year. If you cut them back in winter, you are likely cutting off the coming display. Once flowering has finished, they have time to grow fresh stems through the warmer months and set buds for next spring.<\/p>\n
Summer-flowering shrubs generally bloom on fresh growth made in the same season. A late-winter prune encourages plenty of new shoots, which means more potential flowers when the weather warms up. Roses are the familiar example, although the exact timing and pruning style depends on the rose type.<\/p>\n
There are exceptions. Some plants flower in more than one flush, while others are grown as much for foliage as flowers. Rather than treating every shrub the same, identify the plant first and then make the cut with a purpose.<\/p>\n
In Perth, prune spring favourites such as azaleas, camellias, viburnums, lilacs and flowering quince soon after their flowers fade. Avoid leaving it too late into summer, especially for camellias and azaleas, as next year’s buds may already be forming.<\/p>\n
Prune repeat-flowering roses in winter, usually from late July into August in many Perth gardens. Cut back hardier bush roses to shape, remove tired wood and open the centre for airflow. Lightly trim climbing roses after their main flowering period, keeping the long structural canes where possible and shortening side shoots.<\/p>\n
Summer bloomers such as butterfly bush, crepe myrtle and many salvias respond well to pruning in late winter. This is also a practical time to remove frost damage in cooler Perth hills gardens, although coastal gardens may be able to tidy plants earlier.<\/p>\n
Hydrangeas need a little more care. In many varieties, the old stems carry next season’s flowers, so remove spent blooms and the oldest stems rather than cutting the whole shrub to the ground. Newer repeat-flowering types can be more forgiving, but a heavy winter haircut is still rarely the best option.<\/p>\n
Start by looking at the whole plant from a few steps back. Your aim is not to make it perfectly round. You want a shrub with an open, natural shape, healthy young growth and enough room for light and air to reach the centre.<\/p>\n
First remove dead, damaged or diseased stems. Then take out branches that cross and rub, along with thin, weak shoots that will not carry a good display. Make each cut just above an outward-facing bud or side branch. This directs new growth away from the middle rather than creating a crowded tangle.<\/p>\n
For an established shrub, remove a few of the oldest stems right down near the base. This is called renewal pruning, and it is often better than shearing the outside of the plant year after year. It lets younger stems take over while retaining the shrub’s natural form.<\/p>\n
Avoid removing more than about one-third of a healthy shrub in one go unless you know the species tolerates hard pruning. A severe cut can be useful for a leggy, neglected plant, but it may sacrifice flowers for a season and can stress shrubs during a hot Perth summer.<\/p>\n
Sharp, clean tools make a noticeable difference. Blunt blades crush stems, creating ragged wounds that are slower to heal. For most home gardens, secateurs handle smaller stems, loppers are useful for thicker branches and a pruning saw is safer than forcing oversized stems through loppers.<\/p>\n
Clean your blades before moving between plants, particularly if you have spotted scale, sooty mould, dieback or other signs of trouble. A quick wipe helps prevent carrying disease from one favourite shrub to the next.<\/p>\n
Wear gloves for thorny plants and long sleeves when working around irritating foliage. Put pruning waste in the green-waste bin where appropriate. Do not compost material showing clear disease symptoms.<\/p>\n