Plant name / Botanical name Cold zones Plant description Agastache Agastache spp. and hybrids 5 to 10 Spikes of lavender, pink or orange in summer Ajuga Ajuga reptans 3 to 10 Ground cover with green, bronze or variegated foliage; spikes of blue or pink flowers in spring Anthemis Anthemis tinctoria 3 to 8 Yellow or […]