These three plants can repel ticks in the garden. Tansy, catnip and Dalmatian Insect Flower are all natural insecticides.
Rosemary and lavender can also be used against ticks in your own garden. The smell of tansy is reminiscent of camphor, as Wildbiene.org explains. The essential oils it contains are responsible for this, as well as the plant's bright yellow flowers. The perennial, which blooms from July to September, looks particularly good together with delphiniums.