GREVILLEA baileyana

Typically grows as medium-size tree with grey bark and large rich green foliage 6-30 cm long, with new growth having a rusty bronze colour to the underside.
Fragrant spays of white flowers occur on mass putting on spectacular displays during spring and summer attracting nectar-feeding birds and insects.

Occurs naturally in the rainforest's of north-east Queensland and Papua New Guinea, despite its origin it is very adaptable to a wide range of soils and climates. 

Grevillea baileyana is a medium to large tree, usually 5 to 10 metres but occasionally to 30 metres in rain forest conditions.

Image kindly supplied by Tatiana Gerus (Tatters) CC BY-SA 2.0

Grow notes:

Although seed can be sown most of the year in many parts of Australia seed is generally best sown in spring or autumn in temperate climates, avoid the coldest and hottest months of the year. The optimum germination temperature for germination is around 18-22°C

Larger seed of Grevellia species can be carefully nicked with a sharp knife to expose the embryo slightly prior to sowing, this can assist with the uptake of moisture and can speed germination.

1. Soak seed in water 24 hours
2. Sow seed on a porous seed raising mix and cover lightly. Do not bury seed deeply.
3. Place in a warm shaded or semi-shaded position to avoid dying out.
4. The growing medium should be well-draining but should remain damp between watering. Keep moist but not too wet as the seed may rot. Do not let the growing mix completely dry out. 
5. Germination should occur in 21-60 days depending on the temperature and conditions. 

Pre-treatment of smoke: Not considered critical for this species.
Many members of the Proteaceae are responsive to pre-treatment of smoke. Although germination will often occur without smoke treatment it has proved to be beneficial in reducing the number of days to germination and increasing germination rates in many species.
Smoke treatments are simple and can be undertaken either by soaking the seed overnight or by applying to the surface after sowing, both provide good results. Smoke treatments available by clicking here.

General note: Seeds of many natives are dormant and require specific conditions or pre-treatment for germination.
Do not be too hasty to discard seed that does not germinate, seeds will often lay dormant until the conditions are similar to their natural requirements for germination to occur. Containers put to one side will often surprise long after they were discarded.