If the graft is buried, a lot of roses will go own-root. An own-root Charles de Mills suckers. An own-root Charles de Mills will eat your garden unless stopped by a hard object like a lawnmower.

Whether or not it's a good way to produce more roses depend on how many hundreds of more roses you want, and how well that particular rose sends out side roots along the long sucker roots. Charles de Mills actually isn't very good at that, so I usually have to dig up several feet of long root before anything fibrous shows up. OTOH, Mary, Queen of Scots seems to have fibrous roots practically at the bottom of every cane.

I've grafted gallicas that have eventually suckered after several years. I plant the grafts 1-2" below the soil and they eventually go own-root. My suckering Damasks and Portland damasks are own-root and I have one grafted one that has not done this.

Same experience...I have tons of grafted Gallicas, Damasks and Mosses that tend to sucker on their own root-the ones that sucker the worst seem to be the first to go on-root and start out on their own-like Jenny Duval..others dont...by the way if you have a sucker with no root you can dig down and slice it partially through and give it a hormone dusting and re cover and it should make some roots-it is amazing that many suckers dont survive if you dig them up even if you treat them like cuttings.
patricia

It must depend on the rose. My Leda, purchased from Pickering, has given me a sucker that established in a pot very quickly. I noticed I have other suckers ready to dig.

Barbara

Well, the rootstock might sucker.

Rosefolly

We bury the graft quite deep in Sweden and many gallicas develop their own roots above the graft, but not all. Charles de Mills has taken over a large bed and Belle de Crécy is trying to do the same. Worst suckerer of all my roses is the moss Nuits de Young. My husband and I call it our pension plan. At the rate it suckers we will have an enormous supply of it to sell.

I plant grafted roses with the graft about 2" deep. Rosa gallica and Rosa Mundi have produced many suckers as visitors to my garden can attest when they leave with little plants. Charles de Mills, La Belle Sultane have made one or two suckers (in 4 years). Others have not suckered at all.
My damasks (also from Pickering and planted the same way) have never suckered.
-Stephanie

Its interesting to see that for some, grafted gallicas do sucker eventually, and for others, they do not (or rarely).
I have dozens & dozens of grafted gallicas, mosses, damasks, etc. and only one of mine has ever suckered and I planted them all fairly deep....only Rosa Mundi sent out 2 tiny suckers. OTOH, most of my ownroots have sent out suckers. All of my grafted roses came from Pickering and were planted about 3 inches deep because of my cold climate.

Celeste