Most of these perennials are vigorous spreaders with a penchant for conquering new territory, especially in moist, fertile soil. Keep them under surveillance to ensure they don't invade choicer plantings. Blossoms are yellow or white and appear in summer, except as noted.
- Native to eastern Russia and Asia.
- To 2 feet high, 1 feet wide, with narrow, green leaves to 3 inches long.
- Small white flowers come in foot-long spikes that start out horizontal and gradually turn upright.
- Zones US, MS, LS, CS; USDA 6-9.
- Native to northeastern U.S. Erect clump to 4 feet tall, 2 feet wide, with narrow, green leaves to 6 inches long.
- Nodding, 1 inches., yellow flowers with red-brown centers appear singly or in loose clusters in upper leaf joints.
- Firecracker is similar but has reddish leaves.
- Native to China, Korea, Japan.
- To 3 feet tall, quickly spreading as wide or wider.
- Erect stems with pointed, olive-green leaves to 5 inches long.
- Flower spikes densely packed with tiny white blossoms are 68 inches long, arched like a goose's neck.
- Extremely aggressive spreader; plant only in confined beds.
- Geisha has leaves edged in creamy yellow.
- Zones MS, LS, CS; USDA 7-9.
- Native to China.
- Mat-forming plant grows to 4 inches high and 1 feet or wider.
- Oval, green leaves to 2 inches long; upturned yellow flowers, inches across, in leafy terminal clusters.
- Blooms from spring to summer.
- Good in a rock garden or as ground cover in naturalized areas.
- Eco Dark Satin has yellow blooms with red centers.
- Outback Sunset has red-tinged leaves with yellow variegation and yellow flowers with red centers.
- Persian Chocolate has brownish purple leaves.
- Native to southwestern Europe.
- Leathery, gray-green leaves to 6 inches long form a neat clump to 3 feet tall and 1 feet wide.
- Slender clusters of white, inches-wide, long-lasting flowers.
- Not invasive.
creeping jenny, moneywort
- Native to Europe; naturalized in eastern North America.
- Grows 48 inches high and spreads to 2 feet or more, rooting as it goes.
- Forms an attractive mat of roundish, light green, 1 inches leaves.
- Yellow flowers about 1 inches across appear singly in leaf joints.
- Best use is in corners or containers where it need not be restrained.
- Also good in rock garden or as casual ground cover.
- Will spill from wall, hanging basket.
- Aurea has bright yellow leaves that combine especially well with dark-foliaged plants such as black mondo grass (Ophiopogon planiscapus 'Nigrescens'); it requires a shady location.
- Native to central Europe, Asia Minor.
- To 3 feet tall, spreading to 2 feet or more by underground stems.
- Narrow, green leaves to 3 inches long are borne in whorls on erect stems; inch-wide yellow flowers, also in whorls, appear on top third of stems.
- Looks nice in masses or mixed borders.
- Alexander has leaves with gold edges that fade to cream as the weather warms; it grows less vigorously than the basic species and reaches about 2 feet tall.
- Golden Alexander, to 2 feet high and wide, has yellow-edged leaves.