How to keep your garden full of colour from summer into autumn
A gentle guide to refreshing tired borders and extending interest into the second half of the year.
Once June and July have passed, many gardens reach a familiar turning point.
The early flush of spring and early summer flowers has faded. Perennials that looked full and lush just weeks ago are looking leggy and tired. And somewhere along the way, everything seems to settle into one shade - green.
It's one of the most common things I hear from people at this time of year. Their garden is lacking colour, and they're not quite sure what to do about it.
If that's where you are right now, you're not doing anything wrong. This is simply a natural pause in the gardening year, and it happens to almost every garden around this time. Try to see it as an invitation to step in and make a few small, well timed changes. With the right attention now, your garden can carry colour and interest right through the second half of summer and into autumn.
Why gardens go quiet in midsummer
Most spring and early summer flowering plants, like Geraniums, Peonies, Rhododendrons, Pieris and Camellias, have a natural rhythm. They put on a strong early show, then they rest.
This isn't a failure of the plant, or of the gardener. It's simply biology. Once a plant has flowered, its energy shifts away from producing more blooms.
Left alone, many borders will naturally thin out in colour through June and July, just as everything else in the garden is growing taller and greener. The good news is that with a little intervention, this lull doesn't need to last.
1. Give tired perennials a proper cut back
Plants like hardy Geraniums, Geum, Nepeta (catmint) and Alchemilla mollis become straggly and unattractive once their first flush of flowers is over.
Rather than leaving them to sprawl, cut them back hard. Right down to near the base, or to where you can see fresh growth emerging.
It looks brutal for a week or two but then the new growth begins.
In some cases, you'll be rewarded with a second, often neater, flush of flowers - so it is well worth doing, and the sooner you do it, the sooner the new growth will come.
2. Deadhead little and often
Removing spent flowers before they set seed tells the plant to keep producing more, rather than putting its energy into seed production.
This works especialy well for repeat flowering roses, Geums, Dahlias, Cosmos and Scabious. A few minutes with a pair of snips, once a week or so, makes a genuine difference to how long a plant keeps flowering - it's a simple task to do if you have a spare 10 minutes here and there throughout the week.
3. Fill the gaps with late season plants
This is really the key to extending interest through the garden.
Look for plants that naturally come into their own in late summer and autumn, rather than relying solely on early season varieties.
Some reliable choices include:
Rudbeckia and Helenium, for bold, long lasting colour
Sedum (now more often sold as Hylotelephium), for structure and late nectar
Verbena bonariensis, for height and movement
Asters and Japanese anemones, for a proper autumn lift
Ornamental grasses, such as miscanthus or calamagrostis, for texture that lasts well into winter
You don't need to overhaul an entire border to see the benefit. Even tucking two or three of these into gaps left by faded early perennials can change how the whole space feels.
4. Don't forget about pots and containers
If you're gardening in containers, on a balcony or in a small courtyard, the same principle still applies, just on a smaller scale.
Swap one or two tired summer plants for something like a compact rudbeckia, a late flowering salvia, or a vibrant evergreen grass. Small changes like this give containers the same late season lift as a border, without needing to start again from scratch.
5. Leave a little for the pollinators
It can be tempting to tidy everything away as soon as flowers fade.
But leaving some seed heads, and allowing growth to feel a little looser through late summer, isn't untidy. It's valuable habitat.
Bees, butterflies and birds all rely on this in between stage of the garden, often more than we realise. A little relaxed abundance, left in the right places, often looks better than a perfectly tidy border in any case.
A different kind of gardening task
There's a temptation, at this point in the year, to see a fading border as something that has gone wrong, but I'd encourage you to see it differently.
A garden that's gone green isn't failing. It's simply between chapters, waiting for its next one to begin.
With a little attention now, a hard cut back here, a deadhead there, one or two new late season plants tucked into the gaps, your garden can carry its colour, its interest, and its value to wildlife right through to autumn.
The second half of the growing year has just as much to offer as the first. Sometimes it just needs a little help to get there.
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Nicola
Breagha Garden Design
