By Sarah Giles
Adding garden plants is exciting, but learning about garden borders by doing a little research before you start putting in a wheelbarrow-full of new plants will pay huge dividends. Every border has different growing conditions, even within the same garden, and some plants will be better suited than others so, before you set about creating the border of your dreams, there are a few things to bear in mind.
Our expert tips will guide you through picking the best location for your garden borders, the right plants to choose for your growing conditions and how to keep them looking their best all year round. Keep reading for all the advice you'll need to get started, then check out our garden design ideas for more inspiring ways to create your dream outdoor space.
WHAT KIND OF SOIL DO YOU HAVE?
This is the key consideration. Your soil might be clay, sandy or loam, and it could be acid, alkaline or neutral. Each of those possibilities comes with specific characteristics that some plants will love, but others won’t tolerate. And although it’s possible to change or improve the soil a little, it’s always better to choose plants that will be happy with what you’ve got.
The easiest way to check whether your soil is sandy, clay or loam is simply to mix a fistful of it with water and squeeze it into a ball. A quick internet search using ‘soil ball test’ as your search term will then help you identify the resulting texture. Checking whether you have acid, alkaline or neutral soil is straightforward too. Buy a simple, cheap pH testing kit from any garden centre, or online, then mix a little of your soil with water, add to the test tube and shake. In just a few minutes it will change colour to reveal the result. Want more advice on identifying your soil type? Head over to our guide to soil types for more expert tips.
HOW MUCH SUN DOES YOUR GARDEN BORDER GET?
You also need to work out whether your border is in full sun, or in part or full shade (and if it’s shady, whether it’s dry shade or damp shade). This will have as much of an impact on the plants that will thrive there as the kind of soil you have. To be classed as being in ‘full sun’, a border needs to get more than six hours of direct sun every day in summer. ‘Part shade’ means between four and six hours of sun every day, while a ‘shady’ border is in sun for from zero to four hours a day. Don't worry too much if you garden border gets limited sunshine, however, as our guide to the best shade-loving plants has plenty of suggestions for plants that will thrive in these conditions.
CHOOSING PLANTS FOR YOUR GARDEN BORDERS
Now for the fun part! Once you know the soil and sun conditions you’re dealing with, you can draw up a long-list of suitable plants. Use the information on plant labels, the internet, books and magazines to find out which plants are likely to work best for you, and if there are particular plants you already have your heart set on, research the conditions they like before you commit to including them. Have a walk around your local area too – plants that are thriving in your near-neighbours’ gardens are also likely to be happy in yours. If you want to make encourage plenty of pollinators into your garden, check out our guide to the best bee friendly plants.
DECIDE ON YOUR THEME FOR YOUR GARDEN BORDERS
If you already have a colour theme or style in mind, you’ve got a head-start. But if you’re undecided on the look and feel you want to go for, the ideal planting scheme will become easier to home in on once you’ve drawn up a list of potential candidates that will thrive in the conditions on offer.
MAXIMISE THE IMPACT OF YOUR GARDEN BORDERS
One or two plants that stand head and shoulders above the rest will draw the eye and give it somewhere to rest, making it easier to take in everything else. In larger borders, one or two of the best trees for small gardens can take on this role (crab apples, for example, which have a naturally attractive, open shape and lots of character). In smaller spaces, large shrubs or perennials, such as ornamental grasses or the taller varieties of salvia, are ideal. Gardening guru Monty Don is a huge fan of using salvias for showstopping late summer displays – head over to our feature to read his tips on how to grow salvias in your garden.
To give the border a sense of rhythm and cohesion, tall grasses or shrubs such as wintersweet (Chimonanthus praecox) that flower in winter and then provide a great backdrop for other flowering plants in spring and summer can be repeated three or four times at intervals as punctuation. There’s no need to relegate taller plants to the back of the border, especially if you choose those that have an overall ‘see-through’ character, like lofty, airy Verbena bonariensis, or that have clear stems – these too can act as punctuation points.
And remember that interest doesn’t have to come just from colour – texture and shape should play their part too. A combination of globes, spikes and flat umbellifers, all in shades of one colour, can look amazing.
BUILD UP A PATTERN
Once you’ve chosen your plants, having a clear planting plan from the start will produce a much better end result than randomly putting in plants wherever there’s a gap, and it’s worth knowing a few tricks of the trade. For example, garden designers often get breathtaking results by grouping plants of the same variety in threes or fives, then using ‘filler plants’ to hold the groups together visually.
Then, to give your border a more relaxed, natural feel, it works well to offset a few single plants outside of these groups of three or five. You might, for example, have a swathe of persicaria in the centre of the border and then weave in single persicaria plants on their own towards the back – the impression this gives is of them having self-sown there.
Airy grasses like Deschampsia and Molinia make perfect fillers and their veil-like, transparent quality makes them very versatile. Or you may prefer to employ the more solid shapes of evergreens as your fillers – the choice is yours.
DESIGNING THE THE PERFECT BACKDROP
Most borders have a boundary wall or garden fence as their backdrop and as these are rarely things of beauty in their own right, you can help recede them from view by training climbers up and over them (finding out how to grow clematis, honeysuckle and passionflower is a good idea if the boundary gets a reasonable amount of sun during the day). Or plant tall grasses, shrubs, or even a row of slender silver birches or pleached trees in front of them. Just be sure to keep anything you plant well watered until it’s established, as walls and fences tend to create dry rain shadows. We've got lots more ways to make the most of your garden boundaries with our features on garden wall ideas and garden fence ideas.
KEEP THE INTEREST IN YOUR GARDEN BORDERS GOING ALL YEAR
Whenever you begin planning a garden border, it’s easy to become obsessed with what’s in flower at that point in time. But it pays to think more long-term and include a succession of seasonal stars so that there’s always something flowering its socks off as spring turns to summer, summer to autumn and autumn to winter.
You need supporting acts for your seasonal divas too, so add in a good proportion of plants that perform well over a long period of time, whether that’s because they have an extended flowering season, or because their seedheads stay in place over winter or just because they have good structure all year round, like the tall, upright grass Calamagrostis ‘Karl Foerster’. If you plant a grass like this with veronicastrum, sanguisorba, and nepeta for summer and asters, rudbeckias and heleniums for later in the year, and then surround it with low-growing irises and primroses for spring, it will really earn its keep.
Head over to our guide on how to grow acers for top tips on introducing this stunning plant into your garden for year-round colour.
Top plants to try growing in your garden borders
By now your long-list of suitable plants will have started to be whittled down, and you should be well on the way to a definitive shopping list for a lovely new border. But if you’re feeling overwhelmed by the choice, even once you’ve narrowed down the possibilities, here are some superstars to consider…
For full sun
1. Hemerocallis ‘Stafford’ – this red daylily works really well with other hot colours
2. Sanguisorba officianalis has little small, button-like flowerheads on slim stems and creates a fabulous haze when planted in a swath
3. Echinops ritro has purple-blue, globe-like flowers that float above stiff stems
For damp shade
1. Ferns like Dryopteris wallichiana and Asplenium scolopendrium make a lovely, lush backdrop for more floriferous plants.
2. Aralia cordata is a beautiful foliage plant that has a wonderful, quiet presence in a border
3. Actaeas grow to around 1.5 metres and make great accent plants
For dry shade
1. Geranium nodosum, with its pretty, pale lilac-blue flowers, makes a good filler plant at the front of a border
2. Anemone x hybrida ‘Honorine Jobert’ looks great planted in pockets and adds height and movement
3. Liriope muscari – the lily turf has lovely strappy evergreen leaves and spires of purple flowers in autumn
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