Coastal landscape design in San Diego: planting for salt, sun and less water

A coastal garden in San Diego has a lot going for it: mild temperatures, bright light and views that do half the work. It also has particular challenges. Salt carried on the wind, sandy or heavy clay soils depending on the street, marine layer mornings and dry summers all shape what will thrive, and what will look tired by August.

Start with exposure, not with plants

Before choosing a single plant I map the site: where the prevailing wind comes from, which areas catch salt spray, where the afternoon sun is harshest, and where water collects after rain. A garden that is designed around those conditions needs far less correction later.

• Use structure to break the wind: walls, hedging and layered planting create calm pockets where softer plants and people can settle.
• Place the most tolerant plants on the exposed edge, and save delicate textures for sheltered courtyards.
• Improve and mulch the soil. Healthy soil holds water longer and keeps roots cooler.

A Mediterranean palette, used with restraint

Plants from the world's Mediterranean climates, including California's own natives, tend to do well here because they evolved for wet winters and dry summers. Olive trees, rosemary, lavender, salvias, westringia, agaves and grasses can look lush and refined when they are used in confident drifts rather than one of everything. Natives such as ceanothus, coastal sage and toyon add habitat for pollinators and birds.

Luxury in a garden is less about rare plants and more about composition: repetition, generous spacing, a clear hierarchy of trees, shrubs and ground layer, and a palette of greens, silvers and soft flower colour that sits well against stone and plaster.

Water: design for less from the beginning

Grouping plants by their water needs, using drip irrigation with a smart controller, and limiting lawn to the places where it is actually used will reduce water dramatically without making the garden feel sparse. Where a family wants grass to play on, I make it a deliberate room in the landscape rather than a default ground cover.

The best coastal gardens feel effortless because the hard thinking happened before the first plant went in.

Light the garden for evening

In our climate the garden is used as much after sunset as during the day. Warm, low-glare lighting on paths, a few lit trees and soft light on water extend the living space and make the view from inside beautiful at night. Planning the lighting with the planting avoids fixtures that fight the design later.

Every site is different, and local rules on water use and coastal development can apply. A planting and lighting plan drawn for your property, and ready for your landscape contractor, is the surest way to get a garden that matures well.