How tall can parade miniature roses become? Thank you.
Here is a link to an article for you: https://www.gardeningknowhow.com/ornamental/flowers/roses/how-to-care-for-parade-roses-outdoors.htm
It really depends on the bush. Some can get 2 feet tall while others will be 12 inches to 18 inches tall and bushy.
Can the parade rose bush be left outside during the winter?
If planted in the ground they should be treated like other garden roses for winter. If in pots, they need to be brought in for the winter but can be kept in a cool area with less light so they will go dormant and rest up for the coming Spring. Check out these links; https://www.gardeningknowhow.com/ornamental/flowers/roses/roses-winter-care.htm
https://www.gardeningknowhow.com/ornamental/flowers/roses/mounding-roses.htm