Green canes from just finished blooming roses would be called soft wood cuttings. In cold climates those are taken in the spring not the fall usually. Hard wood cuttings are from older, thicker and sometimes brown or barky looking canes. Those can probably be taken at any time. However, if winter is coming on now where you are then you would have to keep them inside. That is risky in it's own right. Roses HATE being indoors!

I don't know that there is any difference in success rates between the two types. It depends both on the variety and growers care and procedure. Doing successful cuttings by either method takes practice and experimentation to find the procedure that works best for you. It took me years to find a method that I had any success with and even that is not a sure thing.

My advice is to just do it. Try several methods and tweak and experiment until you find one that works well for you in your climate and with your roses. Don't be afraid to fail. You'll learn things that way.

Not knowing what wild roses you have I can't say how well they'll root but it's worth trying. If you want to take cuttings now take older thicker canes and use the hard wood method. Or wait until spring and take soft wood cuttings after they bloom and root them. Or try both ways!

Freshly stuck cuttings outside in freezing weather will probably die. Even newly rooted ones stand a very slim chance of making it. I have heard of methods where a cane is just stuck into the ground and covered with a jar or something and left over the winter but I've never tried this method and don't know how it would do in a severely cold climate. I'm in zone 6 and have never had much luck even in summer with this method.

Thanks so much
I really appreciate these valuable guides.

Let's start over.

Semi-hardwood cuttings are the ones taken from a stem that has recently bloomed. They can be taken any time the roses are blooming. Some people prefer to do this during the summer. Some people prefer to do it during the fall. These cuttings are usually rooted in warm and humid conditions. If the cuttings are being rooted in the fall, the rooting will be done indoors.

Hardwood cuttings are done over the winter. A bed is prepared for good drainage, the cuttings are stuck in the bed, and ignored until spring. Obviously this only works with hardy roses so the cuttings don't automatically die from cold. The success rate is usually lower than with the semi-hardwood cuttings, but it is very easy to do. I've only done it once because I don't need many plants of one variety.

I don't know which method would be more effective with dog roses. I'd be tempted to try and grow those from seed.

Hi Mad gallica
Thanks for the useful answer