This is the time of year for aphids and other pests to be causing problems with roses, annuals and perennial plants. Rather than spray a chemical pesticide we have been using Fish Oil based Organocide. It carries no restrictions on the label (caution, warning, danger, indications) and is suitable for organic production of fruits and vegetables. You may have to apply it a bit more frequently, and it may smell a bit fishy, but it works quite well. It has it’s limitations, but works quite well if properly applied (always read and follow application instructions). Safer Soap is another good option for a less toxic option for pest control.
For More: See Harmony Farm Supply’s Website of Pest Control Options