What to plant next to a Granny Flat slab?

gellybel

  

Hello ! Looking for ideas on what to plant along the edge of a granny flat. Part of the slab is exposed so I would like to cover that but also wary of any root systems that may damage the slab over time. I was originally set on murraya or viburnum but was advised the root system can be damaging. Considering also having planter boxes alone the edge but I think planted would be easier. Thank you ! 

EricL

Hello @gellybel 

Welcome to the Bunnings Workshop community. It's sensational to have you join us, and thanks for sharing your question about landscaping near your granny flat.

That’s a great idea softening the edge of the granny flat with plants will really lift the look and help disguise the exposed slab. Since you’re rightly cautious about root systems, it’s best to avoid hedge-type shrubs like Murraya or Viburnum that develop strong, spreading roots which could interfere with the foundation over time. Instead, you can focus on compact, shallow-rooted varieties that provide greenery and colour without risk.

For low-maintenance, neat planting, consider varieties like Lomandra longifolia ‘Tanika’, Lomandra glauca ‘Blue Ridge’, or Nandina domestica ‘Nana’ (Dwarf Nandina). These are all hardy, native, and well-behaved around structures. They form tidy clumps, tolerate full sun, and handle both dry and wet conditions well. Their root systems are fibrous rather than invasive, so they’re safe near concrete.

For a softer, colourful look, Callistemon viminalis ‘Little John’ and Alyogyne huegelii ‘Blue Heeler’ work beautifully. They stay compact, flower seasonally, and add both texture and brightness without deep roots. Please make sure to call the store for availability before proceeding.

As for planter boxes, they’re a good alternative if you want flexibility or need to maintain clear drainage zones near the wall. You could use long trough-style planters with trailing plants to spill over the edges and hide the slab visually.

Before planting directly into the ground, just make sure there’s a small gravel or drainage strip against the slab to prevent constant moisture contact with the wall. With the right mix of low-root natives and groundcovers, you’ll get a lush, tidy look that stays slab-safe for years.

If you need further assistance, please let us know.

Eric