That is exactly why some people "plant" the cutting into a potato, first. That actually does help roots form. The honey thing, have not tried that myself, but it is meant to work.

Have grown roses straight from cutting, using the potato then tub then ground method, no grafting. four out of six survived, not too bad.

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@amber-eyed-girl wrote:

There are various ways. Some people take a cutting then grow the roots in a potato, then put it into a tub later. Others coat the cut in honey and straight into the ground.

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i used a root extractor powder (pinkish stuff)

dip the end of the cut in water and coat it with the powder, stick it in a potty mix

had a good success rate, about 90% would take, i would flog them off for about $5 each, but most people preferred & were clued up on the nursery root stock varieties

Is it possible to grow Banksia roses from cuttings?

The honey might be the equivalent of the root powder.

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@bushies.girl wrote:

Is it possible to grow Banksia roses from cuttings?

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depends on what bansia roses are.

if they are banksias they will take on slowly and most likely die before they do so.

i don't know what they are. just try a few cuttings and see what happens.

also  bunnings stock them.

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@bushies.girl wrote:

Is it possible to grow Banksia roses from cuttings?

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i don't see why not

if hanging branches on the soil have taken root it's a good indication they will

your local nursery should advise you on the best method to reproduce them 

eucalypts can NOT be grown from cuttings for example.

wattles are best grown from seeds (unless it's a acacia leprosa which you have to grow from a cutting if you want to retain the red colour).

you can grow melaleucas and eucalypts very easily from seed.

i have found that silver cassias (senna artemisoides ssp artemisoides) grows readily from seed but dies in winter in a pot from root rot (required rainfall/annum 150 mm) but does survive the winter in a dry spot near an umbrella tree (from QLD) which will suck the soil dry even in winter.