Euphorbia

Milkwort

Named after Euphorbus, physician to the king of Mauritania, this robust, sun-loving genus includes the familiar Poinsettia and is over 1600 species strong. Most species have a poisonous milky sap and softly colored bracts that surround subtly defined flowers. Autumn watches their narrow green leaves turn shades of red, orange and yellow.

<i>Euphorbia amygaloides</i> ‘Ruby Glow’

A gorgeous medley of deep burgundy, bronzy maroon and ruby red suffuses this Euphorbia's head turning foliage. Cresting a well-groomed base defined by plush evergreen leaves and sturdy stems, plentiful ebullient chartreuse blooms provide vivid contrast. Compact, hardy and downright irresistible ‘Ruby Glow’ can be nestled near the front of the border, along a pathway or showcased in a patio container. (uspp#22,200)

Blooms March–May.

Size: 12" – 18" high x 18" wide.

Hardy to zone 6.

Euphorbia ‘Blue Haze’ (P-1235)

Each $8.00

AVAILABLE AUGUST 2018

This choice Euphorbia hybrid between nicaeensis and seguieriana subsp. niciciana is relatively unknown. Crowned by yellow-green flower heads, the attractive, blue-gray linear foliage is densely arranged in a compact and bushy evergreen mound. A backdrop of Cistus ‘Little Gem’ with Geranium ‘Orion’ creates a pleasing contrast to its pale pointed leaves and glowing blooms.

Blooms July–September.

Size: 18" high x 2' 0" wide.

Hardy to zone 5.

A standout for its wine-colored new growth, bronzy purple foliage with red-hued leaf undersides and stocky red stems, this robust, low growing wulfenii hybrid boasts large, cylindrical, golden yellow flower heads. Try planting in a mixed border with Cistus ‘Snow White’ and Cynoglossum nervosum for spectacular concurrent blooms.

Blooms April–late July.

Size: 2-1/2' high x 3' 0" wide.

Hardy to zone 7.

<i>Euphorbia characias</i> ssp. <i>wulfenii</i>

Distinctive and drought tolerant, this Euphorbia deserves to be used as a specimen. Its cylindrical flower heads are yellow-green and can reach 6 to 9 in. across and 9 in. high. Combine with an understory of Nepeta and Heuchera ‘Apple Blossom’, and enjoy the dynamic array of bloom color.

Blooms March–June.

Size: 3' 0" – 5' 0" high x 3' 0" – 4' 0" wide.

Hardy to zone 7.

<i>Euphorbia characias ssp. wulfenii</i> ssp. <i>wulfenii</i> ‘John Tomlinson’

A selection made from wild seed collected in the former Yugoslavia by the namesake, this charismatic Euphorbia is esteemed for its handsome compact profile and glowing yellow-green conical inflorescences. Large rounded and broad heads taper towards the base while housing crowded bell-shaped flowers.

With color that promises to exhilarate, ‘John Tomlinson’ unites swirls of waxy blue-gray leaves on green stems beneath dazzling, sunshine-bright blooms alongside warm-hued Isoplexis canariensis in our mixed border.

Blooms March–June.

Size: 3' 0" – 4' 0" high x 3' 0" – 4' 0" wide.

Hardy to zone 7.

<i>Euphorbia characias</i> ssp. <i>wulfenii</i> ‘Lambrook Gold’

This show-stopping spurge was bred into being by the late plantswoman Margery Fish. Large, glowingly yellow blooms have a bright canary chroma that competes with the sun. Broad and bushy, its compact forest of erect stems is lined with slender gray-green leaves, relaxing downward in graceful arcs.

Blooms March–early July

Size: 3-1/2' high x 3-1/2' – 4' 0" wide.

Hardy to zone 7.

<i>Euphorbia characias</i> ‘Red Wing’

Perhaps more muted in color than a cardinal’s wing but still as captivating, this new cultivar is enlivened with red-tinged young growth and red floral buds held by reddish stems. All this rubescent coloring richly complements the handsome dark green foliage, and in late winter the profusion of radiant yellow-green bracts set its compact form aglow. Appealing year-round, ‘Red Wing’ can be paired with Omphalodes.

Blooms late March–May.

Size: 20" – 2' 0" high x 2' 0" wide.

Hardy to zone 5.

Honoring plantsman Kent Copton, who developed both a garden and a nursery in Faversham, England, this well-groomed shrubby Euphorbia produces finely hewn cool bluish green foliage and billowing masses of lime-green flowers in an endless summer procession. Compared to E. ‘Dean’s Hybrid’ or E. ‘Blue Haze’, its needle-like linear leaves are longer, while its larger semievergreen mound surpasses E. ‘Limewall’s. For a lovely floral pairing, ‘Copton Ash’ can be planted with Geranium sanguineum var. lancastriense along a pathway, amidst rock work or in a planter.

Blooms May-October

Size: 2' 0" high x 2' 0" wide.

Hardy to zone 7.

Euphorbia ‘Dean’s Hybrid’ (P-1337)

Each $8.00

AVAILABLE SPRING 2019

<i>Euphorbia</i> ‘Dean’s Hybrid’

We have Dean Dalton of Occidental, California to thank for discovering this brilliantly colored, marathon blooming Euphorbia. Electrifying billows painted in acid yellows envelope a dense green globelike mound of fine textured narrow foliage.

First staged in spring, followed by a rebloom from summer until nearly winter, the fantastic floral show eventually attains orange hues, further heightening its low growing understory. In addition to his untiring floriferous nature, ‘Dean’s Hybrid’ maintains a well mannered, carefree profile that looks downright extraordinary as a container subject, spotlighted atop a wall or by a staircase.

Blooms April & September–October.

Size: 18" – 2' 0" high x 2' 0" wide.

Hardy to zone 7.

Dwelling above 5000 ft. throughout the eastern Himalayas in forest clearings and grazed hillsides, this superb robust species sports olive-green foliage with a springtime rubescent blush and distinctive milky white midribs. Staunch, red-imbued clumping stems bolster summer blooming lime-yellow inflorescences. We spotted this unique form of Euphorbia donii at Christopher Lloyd’s Great Dixter years ago and have since enjoyed its cool-colored bracts swaying amid Sanguisorba ‘Red Thunder’ in our own garden.

Blooms June – October.

Size: 5' 0" high x 4' 0" wide.

Hardy to zone 5.

<i>Euphorbia</i> ‘Excalibur’

We are pleased to be able to offer this regal Euphorbia from England. Red-tinted young shoots add colorful accents, while the slender leaves have a prominent creamy midrib and are delicately rimmed in a deep velvety burgundy. Long lasting yellow bracts crown the stunning display. For a lively match, try planting ‘Excalibur’ with Geranium ‘Nimbus’.

Blooms June–July.

Size: 3' 0" high x 2' 0" wide.

Hardy to zone 5.

<i>Euphorbia griffithii</i> ‘Fern Cottage’

Warm colors radiate from this vigorous seedling selection by Clive Jones, named in honor of the house he was living in at the time. Bronzy pink tips, colorful reddish stems and leaf margins, burnt orange flower bracts and magnificent fall color give ‘Fern Cottage’ a cheerful rosy glow through most of the season.

Blooms March–July.

Size: 3' 0" – 3-1/2' high x 2' 0" & spreading wide.

Hardy to zone 6.

Euphorbia griffithii ‘Fireglow’ (P-0070)

Each $8.25

AVAILABLE LATE AUGUST 2018

This bold native of the Himalayas and western Asia warms any rock garden and makes a magnificent companion to Corydalis f. ‘Blue Panda’ and Kerria ‘Albiflora’. ‘Fireglow’s flame orange bracts and brick-colored flowers stand torchlike on strong pomegranate red stems, and its soft green foliage blushes crimson and yellow in the fall.

Blooms April–July.

Size: 3' 0" high x 2' 0" & spreading wide.

Hardy to zone 6.

Euphorbia griffithii ‘Great Dixter’ (P-1232)

Each $8.75

AVAILABLE MID OCTOBER 2018

<i>Euphorbia griffithii</i> ‘Great Dixter’

Renowned garden writer Christopher Lloyd, selected this Euphorbia for its sumptuous display of fiery hues. Heightened by purple coral shoots, reddish bronze stems, dark green foliage flushed with copper-red tints and burnt apricot-pink blooms, ‘Great Dixter’ seldom experiences a lackluster moment. The unforgettable brilliance that emanates from this superb, compact griffithii can be shown to great affect next to Brunnera ‘Langtrees’s soothing colors.

Blooms April–July.

Size: 2' 0" – 3' 0" high x 2' 0" & spreading wide.

Hardy to zone 6.

<i>Euphorbia</i> ‘Helen Robinson’

From the robbiae side of the family, this choice, stalwart Euphorbia inherits its compact stature, shade tolerance, and handsome, stout rosettes of blunt-tipped, dark green leaves; the characias side contributes the good-sized chartreuse flower heads. In our garden, it acccompanies Anchusa with a carpet of Corydalis ‘Pere David’ skirting beneath.

Blooms April–mid-July.

Size: 2-1/2' high x 3' 0" wide.

Hardy to zone 7.

<i>Euphorbia</i> ‘Jade Dragon’

Evoking images of viridescent dragon scales, pointed blue-green leaves create a compact deer proof assemblage that’s infused with reddish purple tinges. This tidy-looking robust Milkwort shoulders summer blooming chartreuse flower heads nearly one foot across. Consorts such as Panicum ‘Shenandoah’ and Eupatorium ‘Gateway’ accentuate its colorful hues.

Blooms July–October.

Size: 2' 0" – 2-1/2' high x 3' 0" wide.

Zone 6/7.

<i>Euphorbia</i> ‘Limewall’

Small, whorled linear leaves, bathed in tranquil bluish celadon hues, are pointed and narrow, yet slightly broader and not as closely arranged as those of ‘Dean’s Hybrid’. A long lasting day glow display of bright lime-green flower heads and wine-infused older stems bring dramatic elements to the low tailored evergreen mound that needs minimal water and braves the deer. Grateful for a well-drained niche, ‘Limewall’s effulgent blooms enliven perennials such as Saponaria ‘Max Frei’ and Origanum libanoticum.

Blooms May–October.

Size: 12" high x 2' 0" wide.

Hardy to zone 7.

Native to the mountain meadows and forest clearings of the Himalayas, this vigorous species is most notable for its upright stature and beautiful foliage, highlighted with white midveins and pinkish margins. Along with its big and bright chartreuse flowers, these colors make for a lovely combination with Nepeta ‘Pool Bank’, Miscanthus ‘Malepartus’ and Aster ‘Mönch’ in the perennial border.

Blooms mid-May – September.

Size: 4' 0" – 5' 0" high x 3' 0" – 4' 0" wide.

Hardy to zone 6.

<i>Euphorbia mellifera</i>

We first saw this evergreen Euphorbia at Sissinghurst; its native home is the Canary Islands. Shrublike and taller than its relatives, its smooth green stems are whorled by narrow, bright apple green leaves marked with prominent cream-hued midribs. The "honey-bearing" epithet foretells the ambrosial aroma of its intriguing flowers, which range in color from butter to terra-cotta.

Stately in a container, Euphorbia mellifera is not reliably hardy where winters are cold and wet.

Blooms June – July.

Size: 5' 0" – 7' 10" high x 3-2/3' wide.

Hardy to zone 9.

<i>Euphorbia myrsinites</i>

Waxed silvery blue, evergreen leaves held in succulent spirals make this stalwart perennial appear otherwordly. In midwinter, its thick trailing stems grow upward, fashioning an 8 in. tall base for the starry, lime-green flowers and lemon-yellow bracts, which form large brilliant crowns, highlighted with pinkish streaks. A Eurasian native undaunted by cold, heat or drought, Euphorbia myrsinites brings an exotic flavor to a well drained site in the rockery or atop a dry stone wall.

Blooms April–June.

Size: 15" high x 2' 0" wide.

Zone 5/6.

<i>Euphorbia polychroma</i> ‘Candy’

A sweet melding of purplish new tips in spring, sulphur yellow flowers and narrow, curvy-edged leaves with a bluish tint creates an exceptionally tidy, low growing mound. A delectable addition to any border, pair this carefree, long-lived Euphorbia with Brunnera or Omphalodes.

Blooms February–May.

Size: 12" – 16" high x 2-1/2' wide.

Hardy to zone 5.

<i>Euphorbia rigida</i>

Beware! The sculptural patterns created by these sharply pointed, powder blue, narrow leaves clasping pale green stems may leave you feeling mesmerized. Warmed with burgundy tinges as the weather cools, the fleshy, evergreen foliage bolsters acid green, rounded flower heads that remind us of miniature poinsettia blooms.

Claiming the Mediterranean from Portugal to South Africa as its homeland, this easy-to-grow toughie asks only for a dry, sunny spot, and in turn promises superb winter color in a container or in the garden amid small bulbs and Agave ‘Garland’s Gold’.

Blooms April–June.

Size: 18" – 2' 0" high x 2' 0" wide.

Zone 7/8.

<i>Euphorbia sikkimensis</i>

An Eastern Himalayan inhabitant, this summer blooming Euphorbia has young reddish shoots and a lovely pink cast to its new leaves. Mature foliage is large and apple green with a creamy pink midrib, while thick, upright reddish stems slowly spread, supporting the lime-green flowers without staking.

The Sikkim Spurge provides architectural interest and alluring foliar contrast when it flanks broad-leafed Salvia prezwalskii.

Blooms July – September.

Size: 4' 0" high x 2' 0" wide.

Hardy to zone 6.

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Current Staff's Favorite Plant

Current Staff's Favorite Plant

Helianthus 'Sheila's Sunshine', Persicaria 'Summer Dance', and Selinum wallichianum

Helianthus ‘Sheila’s Sunshine - P-0461

The sunflower was once an emblem of the Sun God of the Incas. Our sunflowers tolerate a wide range of garden soils, attract bees, and make great cut flowers. Blooms early August – October.

Persicaria ‘Summer Dance’ - P-1312

With foliage that’s close to lime-green, and spiky floral tails that approach the scarlet spectrum of rosy pink, this slow spreading perennial is sure to please. Happiest in semishade with ample moisture. Blooms August–November.

Selinum wallichianum - P-1406

This refined Himalayan beauty happens to be one of our favorite perennial umbellifers. With untold elegance, infinitely divided leaves craft a delicate, lacelike transparency. The compact yet airy green canopy is framed by distinctive, purple-infused branching stems that elevate a charming, late season display of white flattened umbels.

Subduing the riotous array of summertime blooms, it seldom needs staking, and appreciates a well draining moist niche. Blooms June–August.

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