Grevillea Robusta, also known as Silver Oak or Silky Oak, is a sun-loving evergreen tree that thrives when placed in bright, direct sunlight, so pick a sunny spot indoors to help it grow tall and strong. With its silvery, fern-like leaves the Silver Oak adds an elegant touch to any home.

Instructions:

We recommend using the following to sow the seeds: 

• 12 Cavity Greenhouse
• Soil Pellets or Soil Pods 
• Liquid Fertilizer 

Grevillea Robusta, aka Silver Oak or Silky Oak is an evergreen tree native to Australia that prefers lots of light, so make sure to place this plant in a spot with lots of direct sun when growing indoors!

To plant the seeds, pre-soak in warm water for 12-24 hours, sow in a well-draining medium, cover with a humidity dome and keep >70F(use a heat mat if necessary). The seeds can germinate very quickly given good conditions, otherwise they can take up to 60 days to germinate.

(Find more info on germinating seeds by going to our seed guide)

These seeds are for the 2026 growing season.

About the seeds:

difficulty	beginner | intermediate | advanced
germination time	14-60 days
depth	1/4"
spacing	1-3 seeds per nursery pot or soil pod
recommended planter	2“-4" nursery pot(no terra cotta for germination)
time to maturity	1 year+
seed prep	pre-soak | scarification | stratification | none
method	greenhouse | paper towel method
temperature	70F - 85F

 

About the Plants:

description	evergreen tall tree with green fern-like foliage and silvery undersides
difficulty	beginner | intermediate | advanced
growth speed	slow | medium | fast
size of plant	up to 100' if grown outdoors
light	full sun | partial sun | shade | grow lights
soil	well-draining sandy coconut coir/peat-based potting mix
temperature	warm | cool
pet-friendly	cats | dogs | no
pests	scale, fungus, root rot
fertilization	heavy | moderate | light