How to plan a planting scheme, step by step
To plan a planting scheme, start with your conditions rather than a plant list: light, soil and moisture decide what will thrive. Then build the scheme in layers, from structure down to ground cover, choose a small palette of plants that naturally grow together, and repeat them through the space. Get those steps right and the planting looks after itself far more than you might expect.
Step 1: get to know your site
Every good scheme begins with observation. Spend time watching where the sun falls in the morning, at midday and in the evening, and note which areas stay in shade for most of the day. Dig a few test holes to see whether your soil is heavy clay, free-draining sand or something in between, and check how quickly water drains after rain.
It also helps to notice what already grows well nearby, in your own garden, your neighbours' gardens and the hedgerows around you. Those plants are telling you a great deal about what your conditions favour.
Step 2: decide how the space should feel
Before choosing a single plant, think about mood and use. Do you want a calm, green, textural space, or something bright and full of energy? Will you see it mostly from the kitchen window in winter, or walk through it on summer evenings? A few words written down, such as "soft, airy, late summer", give you a useful filter when the choices start to multiply.
Step 3: think in plant communities
In nature, plants grow in communities: groups of species that share the same conditions and knit together over time. A sunny, dry meadow has a different cast from a damp woodland edge. When you plan this way, choosing plants that genuinely want the same soil and light, they support each other rather than compete, and the scheme feels coherent. This idea sits at the heart of my book, What Grows Together, because it makes planting both easier and more beautiful.
Step 4: build in layers
Layering gives a scheme depth and keeps it interesting through the year. A simple way to approach it is to work from the top down.
Structure: trees, shrubs, hedges and clipped shapes that hold the scheme together in winter. These might make up a modest part of the planting, but they do a lot of work.
Theme plants: a handful of reliable, long-lived perennials and grasses that set the character, such as Sanguisorba, Calamagrostis or Salvia.
Companion plants: plants that weave between the theme plants, adding contrast in shape and texture.
Ground cover: low, spreading plants that cover the soil, cut down on weeding and knit everything together.
Seasonal sparkle: bulbs such as Tulipa 'Ballerina' or Allium 'Mont Blanc' that pop up through the other layers at their moment.
Step 5: repeat, repeat, repeat
Repetition is the single most useful tool in planting design. Choosing fewer plants and repeating them through a border creates rhythm and lets the eye travel. As a rough starting point, pick three to five theme plants and repeat each one several times along the length of the space, in drifts or loose groups, with companions filling the gaps between. You will find a fuller worked example in my guide on how to plant a border that looks good all year.
Step 6: plan for every season
Once you have a draft list, check what each plant offers across the year. Mark flowering times, autumn colour and winter structure, and look for gaps. Spring is often well covered by bulbs, while late summer and winter benefit from grasses, seedheads and evergreen structure. A simple table with months along the top makes any gaps easy to spot.
Step 7: draw it, then count it
Sketch the space to scale on squared paper, mark the structure first, then draw in drifts of theme plants and companions. Work out quantities using planting densities: many medium perennials sit comfortably at around five to seven plants per square metre, larger ones at three to five and smaller ground cover at seven to nine. Planting a little more densely than you think means the soil is covered sooner and weeds have less room.
Step 8: prepare and plant
Clear perennial weeds thoroughly, then improve the soil only as much as your chosen plants need. Plants matched to your conditions rarely need much enrichment. Lay out the plants in their pots first, stand back, adjust, and then plant. Autumn and spring are the best times, with a good mulch of peat-free compost or leaf mould afterwards. My guide to peat-free gardening covers mulches and composts in more detail.
Your planting scheme checklist
Record sun, shade, soil type and drainage.
Write three or four words describing the mood you want.
Choose plants that share the same conditions.
Build in layers: structure, theme plants, companions, ground cover, bulbs.
Pick three to five theme plants and repeat them.
Check interest month by month and fill the gaps.
Draw to scale and calculate quantities per square metre.
If you would like a second pair of eyes on your plans, I offer planting consultations to help you shape a scheme around your own garden and conditions.
Quick answers
How many different plants should be in a planting scheme?
Fewer than most people expect. A small border can look wonderful with five to eight different plants, and even large schemes benefit from a limited palette repeated well.
When is the best time to plant a new scheme?
Autumn is ideal for most perennials, shrubs and trees, as the soil is still warm and winter rain helps roots establish. Spring is a good second choice, particularly on heavy, wet soils.
Should I plant in odd numbers?
Groups of three, five or seven often look more natural than pairs, but rhythm and repetition across the whole border matter far more than strict numbers.
