With summer season shifting into autumn, ideas flip to the choosing the appropriate vegetation to prune in September. It is the perfect time for focused pruning of vegetation and flowering shrubs to maintain them wholesome, vigorous and rising properly. It is a straightforward course of meaning eradicating any lifeless, broken or lopsided twigs and branches to permit the plant to be in one of the best form doable for winter.
Many deciduous varieties may be pruned at any time throughout the dormant season, roughly from now till February relying on local weather variations. As soon as vegetation lose their leaves, their form is revealed and it’s straightforward to see what must go to enhance their general look. Scaling down any densely packed stems allows extra gentle and air to profit the well being of the plant too.
Keep in mind that many shrubs and climbers have spectacular autumn leaf color and berries to take pleasure in earlier than you begin snipping as a part of your September backyard jobs. As soon as the show is over it is a good time to get the secateurs out.
1. Wisteria
When you’re fortunate sufficient to have a wisteria in your backyard design, the beautiful blooms it was coated with again in spring and early summer season shall be a distant reminiscence. So it will not be the very first thing that springs to thoughts in terms of vegetation to prune in September. To get one of the best out of your wisteria, nevertheless, it wants any wispy development pruning now to forestall your plant turning into overgrown.
“For one of the best outcomes, give your wisteria a prune twice a yr,” says plant skilled Helena Jones. “As soon as in August/early September to tidy issues up and to let daylight attain subsequent yr’s flowering wooden, and once more in winter to encourage loads of brief, flowering spurs. Simply in the reduction of all of the sturdy new development to 5 buds and take away any spent flower stalks from this yr.”
Wisteria will not bloom as properly until the vigorous leafy summer season shoots are in the reduction of in late summer season to encourage your plant’s energies into extra bud manufacturing subsequent yr.
Earlier than you begin any pruning, be sure to sharpen your secateurs or some other pruning instruments you will be utilizing so you may make the cleanest of cuts.

Helena Jones is at present head of business at Hedges Direct Restricted, having been within the enterprise since 2022. Her skilled data of the product vary, and horticulture typically, helps Hedges Direct proceed to be the web market chief.
2. Climbing honeysuckle
Climbing honeysuckles do not want a whole lot of pruning to be coated in flowers however should you neglect to prune them the center of your plant will grow to be congested with a mass of tangled, woody stems that finally means you may get flowers solely on the guidelines of the stems. Honeysuckle makes it on to our checklist of one of the best climbing vegetation for pergolas however it’s not a lot use if it is so in want of a prune you may’t see any of the flowers.
Honeysuckle is likely one of the key vegetation to chop again in September and it is the perfect time to sort out restorative pruning, particularly should you forgot to renovate your plant in spring. Most honeysuckles are deciduous and are greatest pruned after flowering throughout late summer season/early autumn, apart from evergreen Japanese honeysuckles which ought to be pruned in early spring.
“The lengthy, trailing stems of deciduous honeysuckles may be shortened to a few or 4 leaves. Take older stems out all the way down to the bottom to advertise new development and keep away from a ‘naked backside’,” says Helena Jones. It is a good suggestion to scale back the variety of predominant stems and take out any crossing branches too, as this may liberate the center of the plant.
3. Frequent jasmine
Frequent jasmine (Jasminum officinale) is one other scented climber that can profit from being pruned in September after flowering has completed. Though it is nice for backyard screening, this selection places on a lot summer season development it could actually grow to be utterly overgrown by September.
You will want to prune fastidiously as subsequent yr’s flowers will already be forming on the older wooden and you do not wish to harm them, so goal to snip again the brand new development on the guidelines of the plant as an alternative. It is nice to prune again arduous if the plant wants rejuvenating, slicing again any diseased stems to a wholesome part of the plant, and aiming for well-spaced stems.
Alternatively should you’re merely tidying up a more moderen plant, in the reduction of overgrown stems simply above the leaf joint. As soon as you’ve got pruned again you may tie in what’s left to create a brand new framework for the plant so it’ll look its greatest subsequent yr.
Frequent jasmine is to not be confused with the opposite in style selection star jasmine (Trachelospermum jasminoides), which is greatest pruned in spring.
4. Climbing hydrangea
As one of many greatest climbing fence vegetation, climbing Hydrangea petiolaris varieties ought to be pruned instantly after they end flowering, which is usually on the finish of summer season and most definitely in September. They aren’t to be muddled up with the opposite hydrangea varieties paniculata and macrophylla (also called mophead and lacecap hydrangeas), that are pruned in spring.
Trim any wayward stems and shoots from climbing hydrangea as a part of your normal tidy up of vegetation to chop again in September, as skipping this stage can result in a poorly formed plant and fewer prolific blooms subsequent yr.
Most flowers are produced in the direction of the highest of the plant, so attempt to not contact these sections, as an alternative concentrating on scaling down aspect branches and reshaping the plant for a greater construction. Take away all of the light flowers as you go as a part of your September snip.
5. Rambling rose
Pruning rambling roses is likely one of the greatest issues you are able to do to enhance their form, construction and assist them flower extra profusely in summer season so your backyard partitions are coated with blooms. As with pruning any sort of rose you may want a superb pair of gloves, some twine for tying in and a pointy pair of secateurs. Prune ramblers in late summer season, which suggests it is one of many key vegetation to chop again in September.
The very first thing to think about is how previous your rambling rose is. New ramblers flower for a few years with none formal pruning vital. However as soon as established they produce a lot of development from the bottom and if not fastidiously skilled will grow to be unmanageable. So the older your rambling rose is the extra essential it’s to take care of its framework.
The primary consideration is to prune again aspect shoots, eradicating any weak or diseased stems, in addition to any lifeless sections. Then practice within the new shoots. At all times maintain the general form of your rambling rose bush in thoughts. Following these straightforward steps will result in new development and flourishing rose manufacturing for years to come back.
Pruning instances differ for different sorts of roses corresponding to climbing roses and shrub roses, as many types of those are repeat flowering and you will not wish to take away buds.
Store secateurs in your September pruning duties
Burgon & Ball Bypass Secateurs
The standard of those secateurs may be felt with the primary snip. Cushioning on the handles makes a distinction, the blades are tremendous sharp and the 10-year assure a bonus.
Dakota Fields Backyard Pruners
That includes a razor-sharp metal blade, the non-stick coating prevents sap and particles from sticking, so you may work repeatedly with out fixed cleansing.
These premium bypass secateurs are perfect for backyard upkeep. They’ve a wire-cutting notch, chrome-plated metal blade and ergonomic grip.
6. Lavender
Sure evergreen fragrant vegetation, corresponding to rosemary, sage and lavender, in addition to different Mediterranean shrubs and herbs are positively on the checklist as vegetation to prune in September.
“Solar-loving shrubs corresponding to lavender and rosemary ought to be in the reduction of in September as they won’t tolerate arduous pruning in winter,” says horticultural skilled Richard Barker from LBS Horticulture. “Lower these vegetation again after flowering, however keep away from trimming previous wooden as this will kill the plant.”
Ideally, lavender ought to be pruned twice a yr, as soon as in September adopted by a tidy-up in spring to maintain your vegetation wholesome, with a superb present of flowers in summer season. Depart the woody base of the plant properly alone, and as an alternative trim stems in late summer season after they end flowering.
Whether or not you develop your lavender within the floor or in pot as a part of your backyard planter concepts, lower stems leaving about 2-3 inches above the woody base. Collect handfuls of stems at a time to make it simpler, with the goal of making a beautiful rounded form for what’s left of the bush. Any lifeless or diseased branches ought to be utterly eliminated, and this may let air into the center of the plant too.

Richard Barker is an skilled in horticulture and the industrial director at LBS Horticulture. He’s eager to share his data with each skilled and newbie gardeners, and prides himself in conserving updated with the newest horticultural tendencies.
7. Quick-growing evergreen hedges
Usually evergreens want little or no pruning as soon as established and that is normally achieved in spring or after flowering. However there are exceptions, corresponding to evergreens used for hedging, which might rapidly grow to be unkempt. It is best to prune fast-growing hedges twice a yr to maintain them trying sensible.
“Evergreen hedges may be trimmed in September to ensure they’re tidy for winter, particularly in the event that they’re fast-growing varieties,” says Richard Barker. “Ideally, lower hedges barely narrower on the prime, as this may make them much less weak to snow harm and cease them from shading themselves out on the base.”
Kinds of evergreen hedging like yew and cypress ought to be pruned in late summer season or early autumn when the brand new development for the yr has completed.
“Until you’ve gotten a flowering hedge – through which case, it is best to trim after blooming – September is right should you’re questioning when to chop hedges,” agrees Helena Jones. “The birds have completed nesting, and it’s early sufficient to keep away from frost harm on freshly lower stems, however late sufficient that there gained’t be a lot regrowth earlier than winter.”
Prune out any broken or lifeless wooden and thick development to let in gentle and enhance the construction of the plant, plus tidy up aspect shoots and any contemporary development that’s spoiling the define.
It is essential to be in control with the authorized peak of hedging between neighbours too when tackling your pruning and slicing again.
8. Frequent field
Frequent field (Buxus sempervirens) is likely one of the hottest evergreens for topiary in landscaping concepts as it could actually simply be clipped into a spread of shapes like balls and pyramids. It is also used for hedging, and in the identical approach as different evergreens like yew and cypress advantages from a superb tidy-up in September.
It is merely a case of calmly slicing again any awkward or straggly stems that spoil the form – utilizing one of many greatest hedge trimmers will make gentle work of the duty. That is a straightforward job as field may be very springy and accommodating. Do that now and your topiary will look sensible proper by the winter months.
September is an efficient time to examine for field blight illness. Though field blight can happen at any time of yr, it’s particularly frequent throughout autumn because it thrives in damp situations. Look out for leaves which have a yellow or orange tinge, brown leaves on the bottom around the plant, and a nice, white powder on the underside of leaves. Checking your vegetation usually will assist fight the illness.
Preserving your slicing instruments in the very best situation is vital when pruning vegetation in September. Sharpening hedge trimmer blades will maintain them working effectively, and in addition keep in mind the significance of cleansing your secateurs and pruning instruments after use to forestall spreading ailments from one plant to the following.
When you’re additionally going to be chopping wooden to replenish your log retailer this month, our information to sharpening an axe will are available helpful to make sure you do it safely and effectively.