Planting a Full-Sun Dry Bed Border

Check your conditions first

This planting plan works best when your bed matches these conditions:

• Full sun At least 6 hours of direct sunlight, typically south- or west-facing. Track shadows at 9am, midday, and 3pm to confirm.
• Free-draining soil Sandy or chalky soil that doesn't hold water. The squeeze test: if a handful of moist soil feels gritty and falls apart when you open your hand, it's sandy. If it's pale with visible white flecks, it's chalky.

Evergreen structure: five shapes

Start with evergreen plants that give year-round structure. The five-shape approach creates visual interest through contrasting forms: tall round focal point, grass-like, architectural mound, groundcover, and short round.

• Pittosporum tenuifolium 'Tom Thumb' (tall round focal) Qty 1. Mature size 0.5–1m × 0.5–1m. This is the centrepiece of the bed—position it first. Source: garden centre.
• Libertia grandiflora (grass-like) Qty 1–2. If planting 2, space ~50cm apart. Mature size 0.5–1m × 0.5–1m. Source: garden centre.
• Euphorbia characias 'Black Pearl' (architectural mound) Qty 1. Mature size 0.5–1m × 0.5–1m. Striking lime-green flower heads in spring. Source: garden centre.
• Wild thyme / Thymus serpyllum (groundcover) Qty 4–5. Space ~25–30cm apart along the front edge of the bed. Mature size up to 10cm × 0.1–0.5m spread. Source: specialist nursery.
• Sage / Salvia officinalis (short round) Qty 2–3. Space ~40–50cm apart. Mature size 0.5–1m × 0.5–1m. Culinary herb that doubles as ornamental structure. Source: garden centre.

Seasonal and pollinator layer

For a ~3m² bed, choose 3–4 species from this list rather than all of them. Plant each in groups of 3–5 for natural-looking drifts rather than scattered singles.

• Yarrow / Achillea millefolium Qty 3–5. Space ~30cm apart. Mature size 0.5–1m × 0.1–0.5m. Flat flower heads loved by pollinators. Source: garden centre.
• Common knapweed / Centaurea nigra Qty 3–5. Space ~25cm apart. Native wildflower, excellent for bees. Source: specialist nursery.
• Field scabious / Knautia arvensis Qty 3. Space ~30cm apart. Mature size 1–1.5m tall. Soft blue pincushion flowers. Source: specialist nursery.
• Harebell / Campanula rotundifolia Qty 5. Space ~20cm apart. Delicate native bellflower. Source: specialist nursery.
• Foxglove / Digitalis purpurea Qty 2–3. Space ~30cm apart. Mature size 1.5–2.5m tall. Biennial accent—don't overdo as they self-seed freely. Source: garden centre.

Alternative choices and swaps

• Agapanthus africanus Qty 3. Dramatic blue flower heads in late summer. Needs winter protection in cold areas.
• Sisyrinchium striatum Qty 3–5. Sword-like leaves with pale yellow flower spikes.
• Bird's-foot trefoil / Lotus corniculatus Qty 5. Native wildflower, low-growing. Source: specialist nursery.

Planting tips for dry beds

• Water well at planting and during the first summer while roots establish. Once settled, these plants rarely need watering.
• Avoid adding too much organic matter—many drought-tolerant plants prefer lean soil.
• Gravel mulch helps suppress weeds and reflects light, mimicking Mediterranean conditions.
• Plant in autumn if possible—cooler, wetter months help roots establish before summer drought.