Among the most carefree and generously blooming perennials for summer and early fall, several being equally useful in the garden and as cut flowers (taller kinds may be cut and dried for winter bouquets). Leaves are gray or green, bitter-aromatic, usually finely divided (some with toothed edges). Flower heads are usually in flattish clusters. Yarrows need only routine care: some watering (though they endure drought once established), cutting back after bloom, dividing when clumps get crowded.
This Mediterranean native grows to 2 ft. high and wide, with ferny gray-green leaves and deep yellow flowers.
Heights up to 8 ft., widths to 1 1/2–2 1/2 ft. Blossoms are 3–4 in. wide, with tufted yell...
Small, rounded plant (9–12 in. high and wide) with egg-shaped, inch-long leaves and blue, sweet-...
Botanically speaking, violas, pansies, and almost all violets are perennials belonging to the genus Vi...