Planting a flower garden in Minnesota includes setting out flowers that are personal favorites as well as interesting new plants. These plants should all be hardy from USDA hardiness zones of 2 through 4 so that they will be able to live and thrive with the temperatures that Minnesota is prone to seeing. Many gardening favorites are indeed hardy at these temperatures.
The common yarrow or milfoil is known botanically as Achillea millefolium. It is a perennial from the aster/daisy family that grows 1 to 3 feet high. The gray-green leaves are lacy and aromatic. The tiny summer flowers are in clustered flower heads 2 to 3 inches wide. The yarrow is hardy in USDA zones 3 to 9. Plant this plant in full sun conditions in poor but well-drained soil. It may need to be staked to stand tall. Propagation for it will be from division or by seed.
The hollyhock is known botanically as Alcea rosea. It is a biennial from the mallow family that grows 5 to 6 feet tall. The rough leaves are 1 to 2 inches long. The funnel-like flowers are 2 to 4 inches wide in red, white, purple, pink or yellow. The hollyhock is hardy in USDA zones 3 to 9. Plant this plant in full sun in well-drained soil. Propagation should be from seed.
The garden lily is known botanically as Lilium hybrids. It is a perennial from the lily family that grows 2 to 10 feet tall. Leaves are narrow and flowers are fragrant. Size, shape and colors all depend on the cultivar selected. The garden lily is hardy in USDA zones 2 to 8. Plant this plant in well-drained soil in full sun or partial shade. Propagation should be by seed or bulb.
The jimsonweed or thornapple is known botanically as Datura stramonium. It is an annual from the nightshade family that grows 3 to 4 feet tall. The leaves are 8 inches long and smell bad. The sweetly fragrant flowers bloom summer to fall and are 2 to 4 inches long. Blooms are white or lavender and funnel-like. Jimsonweed is hardy in USDA zones 3 through 9. Plant this plant in average soil with full sun or partial shade. Propagation should be from seed.
The larkspur or annual delphinium is known botanically as Consolida ajacis. It is an annual from the buttercup family that grows 1 to 3 feet high. The bright green leaves are like feathers. The flowers are on spikes 2 to 3 feet high and are blooming from spring to summer in shades of lilac, white, blue or pink. The larkspur is hardy in USDA zones 3 through 11. Plant this plant in full sun with supplemental watering. Propagation should be from seed.