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Quick Answer
To plan borders that look good all year: use a mix of evergreen shrubs (40 percent), deciduous shrubs (20 percent), perennials (30 percent), and bulbs (10 percent). Choose plants with different flowering times, interesting foliage, and winter structure. Plan for year-round interest, not just summer flowers. In the Chilterns, choose plants suited to the soil (chalk or clay) for reliable year-round performance.
Why Year-Round Borders Are Hard
Most borders look good for 6 to 8 weeks in summer and dull for the rest of the year. The trick to a year-round border is to plan for every season, not just summer. This means choosing plants with different flowering times, interesting foliage, and winter structure.
In the Chilterns, where winters can be long and grey, year-round interest is particularly important. A border that looks good in February and November as well as June is a joy. This guide explains how to plan borders that look good all year, with specific recommendations for Chiltern gardens.
The 4-Layer Border Plan
A well-planned border has 4 layers, each contributing to year-round interest:
Layer 1: Evergreen Shrubs (40 percent)
Evergreen shrubs provide year-round structure. They are the backbone of the border. Choose 3 to 5 evergreen shrubs, planted in drifts of 3 to 5.
- Photinia, red new growth in spring
- Choisya, glossy leaves, scented flowers in spring
- Pittosporum, small wavy leaves
- Mahonia, yellow winter flowers
- Viburnum tinus, winter flowers
Layer 2: Deciduous Shrubs (20 percent)
Deciduous shrubs provide seasonal interest (flowers, autumn colour) and winter structure (bare stems).
- Philadelphus, scented white flowers in June
- Weigela, trumpet flowers in pink and red
- Deutzia, white or pink flowers
- Forsythia, yellow flowers in March
Layer 3: Perennials (30 percent)
Perennials provide summer flowers. Choose varieties with different flowering times.
- Spring: hardy geraniums, epimedium
- Early summer: alliums, nepeta, roses
- Mid summer: echinacea, verbena bonariensis
- Late summer: sedum, Japanese anemone, aster
Layer 4: Bulbs (10 percent)
Bulbs provide early flowers before the perennials get going.
Popular articles
The Year-Round Interest Calendar
| Month | What is interesting |
|---|---|
| January | Mahonia flowers, viburnum tinus flowers, evergreen foliage |
| February | Mahonia flowers, sarcococca scent, evergreen foliage |
| March | Forsythia flowers, daffodils, crocus, new growth on evergreens |
| April | Tulips, choisya flowers, philadelphus foliage, spring perennials |
| May | Alliums, nepeta, early roses, choisya flowers |
| June | Roses, philadelphus, weigela, hardy geraniums |
| July | Echinacea, verbena, sedum buds, lavender |
| August | Sedum, Japanese anemone, verbena, echinacea |
| September | Aster, sedum, Japanese anemone, autumn bulbs |
| October | Aster, autumn colour on deciduous shrubs, berries |
| November | Autumn colour, berries, evergreen foliage |
| December | Evergreen foliage, viburnum tinus flowers, mahonia buds |
Plants for Chiltern Soils
For chalky soils
- Evergreens: photinia, choisya, pittosporum
- Deciduous: philadelphus, weigela, deutzia
- Perennials: lavender, alliums, verbena bonariensis, sedum
- Bulbs: alliums, tulips (Darwin hybrids)
For clay soils
- Evergreens: viburnum, mahonia, holly
- Deciduous: weigela, philadelphus, hydrangea
- Perennials: hardy geraniums, astrantia, filipendula
- Bulbs: daffodils, snowdrops, bluebells
Popular articles
How to Design a Year-Round Border
- Start with evergreens: place them first, as the backbone
- Add deciduous shrubs: for seasonal flowers and autumn colour
- Add perennials: for summer flowers, in drifts of 3 to 5
- Add bulbs: for early flowers, planted in autumn
- Plan for every month: check that something is interesting every month
- Use foliage: choose plants with interesting leaves, not just flowers
- Include winter structure: seed heads, berries, evergreen foliage
The Cost of Planting a Year-Round Border
| Item | Cost (per 10 sqm border) |
|---|---|
| Evergreen shrubs (5) | 150-400 pounds |
| Deciduous shrubs (3) | 90-200 pounds |
| Perennials (15) | 150-300 pounds |
| Bulbs (50) | 30-80 pounds |
| Compost and mulch | 50-100 pounds |
| Planting labour | 100-300 pounds |
| Total | 570-1,380 pounds |
Common Mistakes
- Planting only summer-flowering perennials. The border looks good for 8 weeks and dull for the rest of the year.
- Not using evergreens. The border has no winter structure.
- Planting too close. Plants need space to grow. Check the eventual spread.
- Not matching plants to soil. Acid-lovers die on chalk. Match plants to your soil.
- Not planning for winter. Include seed heads, berries, and evergreen foliage for winter interest.
Frequently Asked Questions
How many plants do I need for a 10 sqm border?
About 25 plants: 5 evergreen shrubs, 3 deciduous shrubs, 15 perennials, and 50 bulbs. Plant in drifts of 3 to 5.
How do I plan for year-round interest?
Make a list of what is interesting each month, then choose plants to fill the gaps. Aim for something interesting every month.
Should I use evergreens or deciduous shrubs?
Both. Evergreens provide year-round structure, deciduous shrubs provide seasonal flowers and autumn colour. Aim for 40 percent evergreen, 20 percent deciduous.
Get Help Planning Year-Round Borders
If you want to plan borders that look good all year in Oxfordshire, Buckinghamshire, Berkshire or Bedfordshire, send us a WhatsApp with photos and we will aim to respond within 12 to 36 hours, Monday to Sunday.
Further Reading
- Best evergreen shrubs
- Best flowering shrubs for low-maintenance borders
- Our soft landscaping service
Mature gardens require a different approach from newly landscaped gardens. Preserve established specimens wherever possible, as they provide instant structure and maturity that cannot be bought.
Put this advice into practice
Use the relevant CGM tool or follow a related guide, then send us a few photos if you would like a tailored plan.
Sources and citations
This article draws on the following sources. Specific claims are cited inline where relevant.
- CGM field records (2025-06. Site observations from gardens across Oxfordshire, Buckinghamshire, Berkshire and Bedfordshire.
- Royal Horticultural Society (2024). RHS Gardening Advice and Plant Finder. Available at rhs.org.uk.
- Met Office (2024). Regional climate averages, South East England. Available at metoffice.gov.uk.
- British Geological Survey (2024). Soil parent material data for the Chilterns and Thames Valley. Available at bgs.ac.uk.