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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.
We recommend using the following to sow the seeds:
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.
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
description
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
warm | cool
pet-friendly
cats | dogs | no
pests
fertilization
heavy | moderate | light
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