Landscape Design on the Central Coast: Plants, Soils, and Salt-Air Solutions

Wed, 22 Jul 2026 14:28:49 GMT

Good landscape design on the Central Coast, NSW, must account for salt air, variable soils, and sloping coastal blocks. Homeowners in suburbs like Terrigal, Avoca Beach, and Woy Woy face environmental pressures that inland gardens simply do not. Getting plant selection and soil preparation right from the start can save years of frustration and replanting costs.

Why Salt Air Is the Biggest Challenge for Coastal Gardens

Salt spray deposits on leaves, draws moisture from plant tissue, and scorches soft-leaved exotics otherwise suited to NSW's climate. Gardens at Terrigal and Avoca Beach can be hit by salt-laden winds directly off the ocean, making plant selection the most important decision in any coastal landscape design.

Native plants are almost always the better starting point close to the shore.

Salt-Tolerant Plants Well Suited to Central Coast Gardens

These species perform well in exposed coastal positions across the Central Coast:

▸ Westringia (coastal rosemary) : a low-maintenance hedge that handles salt spray and dry periods well.

▸ Banksia (coastal varieties) : hardy screening trees suited to sandy, well-drained soils that attract local wildlife.

▸ Lomandra : a tough, strappy grass ideal for stabilising slopes and controlling erosion on uneven blocks.

▸ Pigface (Carpobrotus) : a resilient groundcover that thrives in sandy, salty positions near the shore.

▸ Correa alba : a compact understorey shrub suited to part shade and exposed coastal conditions.

▸ Kangaroo Paw : a colourful perennial that performs well in full sun with well-drained soil.

Layering these plants – groundcovers at the front, mid-height shrubs in the middle, and larger banksias or screening trees at the rear – creates natural wind protection without constant replanting.

How Should You Prepare Coastal Soils Before Planting?

Soil type varies significantly across the Central Coast. Sandy soils are common in beachside suburbs from Umina to Terrigal, draining quickly and holding few nutrients. Heavier clay soils appear in lower-lying areas around Woy Woy, where drainage can be a persistent problem.

Soil Preparation Tips for Central Coast Properties

For sandy soils, incorporating generous organic compost into each planting hole and applying 7–10 cm of mulch improves moisture retention and establishment speed. Avoid piling mulch directly against plant stems. For clay-dominant areas, adding gypsum and organic matter helps break up compaction and improve drainage over time.

Natives in the Proteaceae family – grevillea, banksia, and hakea – are sensitive to phosphorus. Always use a low-phosphorus, native-specific fertiliser, as standard fertilisers can damage these plants even in small amounts.

Design Strategies for Sloping Coastal Blocks

Sloping blocks common in Terrigal and Avoca Beach benefit from retaining walls and terraced levels that create usable flat areas. Connecting these levels with steps and planting lomandra or tussock grasses on the slopes stabilises soil while keeping the design looking natural. Considered landscape design ties these elements together so the garden works with the slope rather than against it.

Ready to Plan Your Central Coast Garden?

Scott Lewis Landscape Construction has been serving the Central Coast for over 15 years, helping homeowners across Terrigal, Woy Woy, Avoca Beach, and beyond create outdoor spaces that are both practical and beautiful. Call (02) 4353 4236 to discuss your project, get in touch via the contact page , or explore the full range of landscaping services available . You can also find Scott Lewis Landscape Construction on Google Maps.