Mulching helps to conserve soil moisture and suppress weeds but keep mulching material away from plant stems. Feed annually in spring with a balanced fertilizer such as blood and bone at a handful per square metre in spring as new growth begins. Make sure the plant gets ample water throughout dry periods. A good rule of thumb is to give your roses one deep watering each week in dry times this will ensure the roots look for water themselves. Check ties for chafing and constriction and loosen if required as the plant grows.
As for feeding your roses, most varieties will do very well with a single feeding in early spring when the leaves start to bud. Since Flower Carpet roses are repeat bloomers, you can feed them several times through the growing season to encourage additional blooms. Give a second feeding just as the first big bloom starts to develop and one more in the middle of the summer to promote later flushes. For maximum flowering and performance feed with a balanced (preferably organic), controlled release rose fertilizer which contains a balance of major nutrients (NPK) and trace elements. It is best not to feed roses in fall and winter as extra nutrients will force new growth and increase the chances of cold-damage over winter. For established landscape plants apply 1 to 2 handfuls around the base of the plant and incorporate into the soil by gentle surface cultivation.
Pruning should be carried out ideally through June and July while the plants are dormant. Pruning flower carpet roses is as easy as giving the plant a quick clip over with hedging shears. Take off approximately a third of the growth.
Take the opportunity to also rake up dead leaves and debris from around the base of the plant as these can lead to pests and diseases re-infecting your plant for the following season.