Outdoors: The garden plants that need don't need soil

What's not to love about a plant that doesn't need soil? Known as epiphytes, staghorn (Platycerium grande) and elkhorn ferns (Platycerium bifurcatum) are clever plants that have adapted to growing on structures rather than in the ground.

I love the texture and shape of their layered fronds, and how their addition within a garden creates a soothing sense of purity and calm – think cooling mist, lichen-covered trees and the freshest crystal-clear air. In the image below, young elkhorns have been mounted onto the trunks of advanced Bangalow palms, adding some greenery at eye level. They are perfect for providing another layer of texture in a garden where it may be difficult to grow more conventional plants.

Where do they thrive? Both stags and elks occur naturally in rainforests across Australia's east coast, growing among trees or fallen logs. Their crowns will catch decaying leaves and insects, which break down to provide nutrients; clever little things indeed. They will grow in colder conditions but it's important to keep them away from repeated exposure to heavy frost, which will kill them. In colder climates, plant under a covered verandah or good tree canopy.

What do they need? Once established, they are surprisingly drought-tolerant but it's best to give them a good soak weekly after installing, and during prolonged hot, dry periods. A seaweed fertiliser at half strength every few weeks through spring and summer will keep them in tip-top form. They also love banana skins.

Light or shade? They love dappled sunlight, so planting them within tree canopies is perfect. Avoid hot afternoon sun; south- and east-facing fences or structures are great spots. They make a stunning green wall when used en masse, at different heights.

How are they sold? Usually on a backing board that just needs to be mounted.