To help rid your plants of aphids try some of these techniques:
• Spray the affected plants with water. Make sure not to damage the flowers, only a light spray is required.
• Place banana peels around the base of your plants.
• Plant garlic next to your targeted plants.
• Attract beneficial insects such as ladybugs to the area around the infested plants by planting carrots, yarrow, asters or dill.
• Use a soap spray that works on aphids, mites, whiteflies and other soft-bodied insects. Mix 2 tbsp of dishwashing liquid with 4 litres of warm water and spray directly on the insects.
• Use garlic spray on the plants to repel pests. Mix ½ cup of finely chopped garlic cloves with 2 cups of water. Mix this well and let it sit for one hour before spraying.