I want to plant three small to medium shrubs to act as a noise barrier so they need to be dense, preferably with grey/blue foliage. What can you recommend? I found Eucalyptus risdonii. Is this suitable? I'm in Melbourne.
Australian/Native Small to Medium Shrubs
Certified GKH Gardening Expert
Eucalyptus risdonii looks like it would be a beautiful option- it doesn't grow densely on its own but I believe it can be pruned so that it will grow densely. You can ask for advice on how to do this at the nursery where you purchase it.
I'm not sure about any others with blue-grey foliage, but Alyxia ruscifolia (Chain Fruit) is a small and attractive shrub that might be an option. Carissa ovata (Kunkerberry) or an Australian variety of Hibiscus might work well.