Roses are healthier when provided with companion plants to help repel destructive bugs while encouraging beneficial insects. Some flowering plants attract beneficial insects that help to control insect pests on your roses. One of those is Phacelia tanacetifolia (Fiddleneck) which attracts scores of beneficial insects, such as parasitic wasps and minute pirate bugs. It is also highly attractive to bumblebees and syrphid (hover) flies. Syrphid fly larvae are voracious feeders on aphids and young caterpillars. Very ornamental with its abundant and long-lasting bell-shaped flowers, this hardy annual is a perfect rose companion plant. You may want to plant this insect predator with all your roses for a healthy and great looking floral display. Enjoy!