Better Homes and Gardens (Australia)
Care for your GREVILLEAS
Aspect Most grevilleas need full sun.
Soil Well-drained. If your soil is heavy, add organic matter or plant in a raised bed with well-drained soil. Poor drainage or overwatering can result in root rot.
Water In the warmer months for the first six months after planting and during long dry periods.
Food Avoid fertilisers with phosphorous, as roots have adapted to thrive without it. Apply a small helping of native plant fertiliser in early spring.
Mulch Put organic mulch around the plant, making sure it doesn’t touch the trunk.
Pruning Knowing when to prune can be tricky, as many are always in flower. But they do have times of generous flowering and, when this is finished, prune by a third to improve shape and generate denser foliage and more prolific flowering. Or, deadhead and cut off branches that spoil the shape of the bush.