How to Propagate Grevillea (Cuttings & Seeds Guide)

Propagating Grevillea is a rewarding way to expand your garden. While you can grow them from both cuttings and seeds, each method has its pros and cons.

Cuttings

Best for cloning a specific variety.
Faster to flower than seed-grown plants.
Ideal for home gardeners who want predictable results.

Seeds

Useful for hybridising or experimenting with new varieties.
Cheaper, but germination rates can be low.
Seedlings may differ from the parent plant.

For most gardeners, cuttings are the preferred method, as they establish faster and maintain the parent plant’s characteristics.

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Step-by-Step: Grevillea Propagation

Propagation from Cuttings

Select a healthy, semi-hardwood stem 10–15cm long. Avoid flowers or buds.
Cut just below a node and strip the lower leaves, leaving 2–3 pairs at the top.
Dip the base in rooting hormone (optional, but improves success).
Plant into a propagation mix of coarse sand and perlite, or a well-draining native mix.
Keep soil moist, cover with a clear plastic bag or propagator, and place in bright indirect light.
Roots should form in 6–8 weeks. Gently tug on the stem to check for resistance.

Propagation from Seeds

Collect mature seed pods when they begin to split.
Scarify or soak seeds in hot water overnight to improve germination.
Plant in a tray filled with sandy, free-draining soil.
Keep moist but never waterlogged.
Seeds usually germinate within 3–6 weeks but can take longer depending on variety.

Once cuttings or seedlings are well-rooted, transplant into small pots filled with a native-safe, low-phosphorus potting mix.

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Aftercare, Fertiliser & FAQ

Aftercare Tips

Harden young plants off outdoors gradually before planting in the ground.
Water consistently, but ensure excellent drainage to avoid root rot.
Mulch lightly to retain moisture and protect developing roots.

Fertiliser for Young Grevilleas

Use only low-phosphorus fertiliser to avoid damaging roots.
Start feeding once new growth appears, every 4–6 weeks with diluted liquid feed.
For strong root development, apply CompleteGrow NPK 20-20-20 in spring at half strength, then switch to CompleteGrow 4-18-38 + CaMg in summer for flower initiation.

FAQ

Q: When is the best time to take Grevillea cuttings?
A: Late spring to early summer, when stems are semi-hardwood, gives the highest success rates.
Q: Do all Grevillea varieties grow from cuttings?
A: Most do, though some hybrids may have lower success. Grafting may be needed for rare cultivars.
Q: How long before propagated Grevilleas flower?
A: Cuttings can flower within 1–2 years, while seed-grown plants may take 3+ years.
Q: Do young Grevilleas need fertiliser?
A: Yes—but always low-phosphorus. Fertiliser supports faster establishment and healthier long-term growth.

Final Recommendation: Propagate Grevilleas from cuttings for faster results and consistent varieties. Once established, support growth with CompleteGrow fertilisers to encourage strong roots, healthy foliage, and vibrant flowers.