To get rid of aphids, set a yellow dish filled with soapy water near the plant. Aphids are drawn to the color yellow. // For spider mites that persist despite a daily spray of plain water, use a buttermilk spray developed by scientists at Purdue University. Combine 1/4 cup of buttermilk and 2 cups of wheat flour in 2-1/2 gallons of water. Pour the mixture into a spray bottle, shake the ingredients thoroughly, and spray it on your plants.
If they die we die - help them in your garden by planting open single head flowers, planting the same plants in clusters rather than peppered around the garden, plant for a succession of flowers throughout the year. Some good varieties include snowdrops, aconites, blackthorn, mahonia, hollyhocks, foxgloves, forget me nots, borage, lavender, wild thyme, buddleia and let the clover grow in your lawn. If you have space for a wild patch they also love dandelion and nettle.