Gardening on Christchurch's Port Hills

Aspect changes the garden

A sunny, exposed slope and a shaded gully can have completely different moisture and wind conditions, even within the same street. Observe conditions before picking plants or a maintenance schedule.

Soil, runoff and stability

The Port Hills include basalt and wind-deposited loess. Environment Canterbury notes that loess can be vulnerable to landslides after heavy rain. Garden maintenance must not be mistaken for structural or geotechnical work.

• Keep stormwater routes clear without redirecting water onto unstable ground.
• Do not excavate or alter retaining walls as part of a routine tidy-up.
• Ask specialists about suspected slips, cracking or significant erosion.

Practical maintenance on slopes

Sloped lawns, steps, steep banks and equipment access affect how long mowing, pruning and waste removal take. Provide Dallas with photographs showing the slope and access.

Plant for the actual site

Choose planting for light, moisture, mature size and the level of safe ongoing maintenance. Council native planting guidance can help with locally appropriate species.