Hence the saying sucker - as the suck the life out of the plant - very common on roses, but any grafted or budded rootstock plant it can happen too - more common in roses as they are popular....…brilliant, that makes sense. Thanks, Joey.
I have budded many a rose by the 1000s in nursery rows as an apprentice....,
I despise the thorns that went into my forearms off the wild rootstock.....the rootstock is more vigorous & has to be compatible with the budded or grafted rose ...