Posted: 06/06/2017 at 13:55
You should be able to see the graft union at the base of the plant. Any stems coming from below that need cutting off. Any above it need to be nurtured as that's your blue rose. If there are none of thses then your blue rose has either died back or been knocked or pruned off and you need to start again.
When planting roses it is now advised that the graft union should be buried 1 to 2 inches below soil level as this makes the plant stronger and allows the variety to put down some roots of its own for extra stability. Make sure you feed them generously every spring with some slow release rose fertiliser and, if possible, a mulch of well rooted manure after a good drink. You can buy it in bags in DIY and garden centres now.