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A shorter Persicaria, this species creeps to form a dense mat. Narrow leaves ascend among its cylindrical flower spikes of varying pinks and reds that bloom mid-summer and into autumn. It's "...native to the Himalayas in altitudes up to 15,800’ where it creeps over alpine slopes, glacial moraines, rocky areas, wet meadows...

Carex ‘Eversheen’ has eye-catching lime yellow and green striped foliage that will brighten up a shady spot, Great as a groundcover or a mixed container plant. Mature size: 12-18 in H x 12-18 in W Minimum temperature: -40° F

Self-sowing, but I wouldn't be without it as it mixes wonderfully for some serendipitous combinations. Tall, violet, kitten-tail spikes are perfect with Heleniums, for instance. Blooming all summer, the semi-evergreen foliage is aromatic and bushy, and deer-resistant; 18" tall. Minimum temperature: -10° F First photo by Salicyna - Own work, CC BY-SA 4.0,...

Fragrant, creamy-white blooms in masses in spring, then smaller bursts through summer. Shiny, dark green, 3-inch long leaves. Evergreen woody, perennial vine; mature size: 3-6 ft T x W Minimum temperature: 10° F

Masses of large, 1.25-inch wide rosy-lavender-pink blooms with deep, rose-pink centers cover this trailing phlox from mid spring through early summer. Sprawling stems grow from a woody center, sometimes rooting and spreading further as they grow. Very good drainage is key to success with this beauty. Mature size: to 2-4 in...

Fascinating, purple-bronze club-like crosiers awaken in spring to become 4–5 ft fronds! Early pinnae are burgundy-red becoming bright green broad fronds mid-season, then...yellow in autumn. These are some of the benefits of a deciduous fern! Moist soil with room to grow is the ticket here. Up to 6-foot diameter footprint. Minimum...

This multi-stemmed dense deciduous small tree will eventually reach about 10' x 10'. Chartreuse new growth turns bluish-green in summer and then buttery yellow in fall. Use as you would a shrub that allows smaller things to be planted beneath it. In fall the leaves will one moment be on the tree,...

Wide, dark purple, heart-shaped leaves flock cascading branches on this 'Covey'/'Forest Pansy' cross. A stunning spring bloom of purple pea flowers comes first, then the leaves. Stake it until it's sturdy for a mound of purple that fits into a small garden or makes an interesting, perhaps curious, focal point. Mature size: 5–10'...

An upright evergreen conifer with a narrow, open habit initially, 'Aurea' has stiff yellow-golden needles (more so with more sun) that develop a blue-green underside toward autumn. This spectrum of yellow to blue creates a richness, depth, and drama that will earn it a prominent place in the landscape. Or...it will make a place in...

Dense and feathery, this globe form grows slowly at about three to four inches per year. It's always handsome, with fresh new light green growth each spring. 32 to 40 inches tall and wide in 10 years. Minimum temperature: -20° F

This petite South African bulb has burgundy pin-striping on its olive-green leaves and pink-mauve loose racemes of starry flowers in mid-spring residing amongst the leaves. These low clumps fill a pot beautifully—the effect is something like a cross between a plant and a cute sea creature (nudibranch?). Keep moist because its home ground is...

Low basal foliage undergirds a bevy of lavender-pink flowers in late summer and fall. 2 ft tall and clumping. Minimum temperature: 0° F

While somewhat short-lived, 'Elijah Blue' is worth it (heck, it's longer lasting than an annual!). Fairly evergreen, this dome of finely textured, stiff, silver-blue needle-like foliage remains 1' x 1'. It's one of the best of the blue fescues and will keep looking good if you remove the seed heads when...

Intense cobalt blue pinwheel flowers bloom from summer into late fall on stems with noticeable reddish-brown hairs. Flowers persist simultaneously with brilliant red and orange fall leaves — the whole shrub glows with this intense color combination! A deciduous shrub, resistant to deer without looking armed and dangerous. Mature size: 3 feet...

This dwarf ninebark has pink and white spring flowers and dark maroon foliage all season. Petite, dark, and dense. Prune about a third of branches to the ground in early spring to refresh. Mature size: 3 – 4ft T x W Minimum temperature: -40° F

Deciduous bright green fronds, reddish brown in fall. Grow in full shade and moist soil, and it will spread happily but not invasively. Mature size: 3 ft tMinimum temperature: -40° F