Low-growing alpines, creeping thymes and cushion plants for rockeries, gravel gardens, raised beds and stone walls in sunny, well-drained spots across Irish and northern European gardens. Free tracked delivery across Ireland and 24 more EU countries.
What are the best rock garden plants for Irish gardens?
The best choices are sun-loving mat and cushion plants that cope with poor, stony soil: creeping thyme (Thymus serpyllum and Thymus praecox), wall bellflowers (Campanula portenschlagiana and Campanula poscharskyana), thrift, Iberis and Erigeron karvinskianus. In Ireland the main threat to these plants is winter wet, not cold, so sharp drainage matters more than anything else.
| Plant | Habit | Flowers | Best spot |
|---|---|---|---|
| Thymus praecox 'Coccineus' | Creeping mat | Crimson-pink in summer; bee-friendly | Between paving, rockery tops |
| Campanula portenschlagiana | Trailing mound | Violet-blue bells in summer; bee-friendly | Walls and crevices |
| Armeria maritima 'Splendens' | Tight evergreen cushion | Pink pompoms, late spring to summer | Gravel, coastal gardens |
| Iberis sempervirens 'Schneeflocke' | Low evergreen shrublet | Pure white in spring | Wall tops and edges |
| Erigeron karvinskianus | Airy, sprawling | White-to-pink daisies over a long season; bee-friendly | Wall cracks and steps |
| Festuca glauca 'Elijah Blue' | Blue tufted grass | Grown for foliage | Gravel and pots |
| Sagina subulata | Moss-like carpet | Tiny white stars in summer | Between stepping stones |
Drainage comes first in wet Irish winters
Most alpines are lost to cold, wet roots rather than frost. On heavy clay, build up rather than dig down: a raised bed or rockery filled with soil mixed with plenty of horticultural grit keeps crowns out of standing water, whereas a grit-filled hole in clay simply becomes a sump. Plant slightly proud of the surface and finish with a collar of gravel or stone chippings so the leaves sit dry through the winter. Water through the first summer; after that, most need little.
Planting walls, gravel and slopes
Tuck small plants into wall crevices with a little gritty compost; Campanula and Erigeron soon seed themselves along the joints. In gravel gardens, plant through the gravel into the soil beneath. Sunny, free-draining slopes also suit Lavandula angustifolia, which is hardy in Irish gardens, and silver-leaved Stachys byzantina. Plant in autumn (September to November) or spring (March to May); on very wet sites spring planting gives roots a season to settle before winter.
Frequently asked questions
What plants grow between paving stones?
Creeping thyme, Sagina subulata, Leptinella squalida, Acaena microphylla and Isotoma fluviatilis all form low mats between slabs. Thyme copes with light foot traffic and releases its scent when stepped on.
How do I make a rockery on clay soil?
Raise it above the clay. Build a mound or raised bed from a free-draining mix of topsoil and grit, set the stones so they are partly buried and tilt back into the slope, then top-dress around each plant with gravel.
Are rock garden plants good for bees?
Many are. Thyme, campanula, Erigeron, lavender and Geranium 'Biokovo' are all single-flowered nectar plants, and planting them supports the aims of the All-Ireland Pollinator Plan.
Keep building your scheme with pollinator garden plants, ornamental grasses and our landscaping advice.