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Plant Reference List - J to K
A  B  Ca  Cl  Co  D  E - F  G  Ha  Ho  Hu  I  J - K  L  M  N  O  P  R  S  T  V - Z

492-002     Jasione laevis 'Blue Light'       
Sun     Zones 6, 7, 8, 9, 10 Blue flowers
Jasione laevis 'Blue Light' bears spiky spherical blue flowers on this compact tufted perennial. Suitable for a rock garden or the border front. Very long blooming.  Summer. bloom   8 in. x 8 in.

553-002D4     Jasminum officinale       
Sun     Zones 8, 9, 10 White flowers
From N. Iran to W. China. Jasminum officinale is a semi-evergreen. Terminal clusters of deliciously scented white flowers give this vigorous twining vine its popularity. The mid-green foliage is delicate and almost fern-like in appearance.  Summer. bloom   Up to 40 ft.

553-013D4     Jasminum officinale 'Argenteovariegatum'       
Sun, Part Shade     Zones 7, 8, 9, 10 White flowers
Jasminum officinale `Argenteovariegatum' is a large, deciduous climber with gray green leaves that have yellow to cream margins. The new leaves are flushed pink. The stems are green and retain their green-ness even after the leaves have fallen in winter. Tubular white flowers with cupped mouths are arranged in terminal clusters of five. They release a delicious perfume which is especially evident on warm days.  Summer to early autumn. bloom   10-12 ft.

553-010D4     Jasminum officinale 'Fiona Sunrise'       
Sun, Part Shade     Zones 7, 8, 9, 10 White flowers
In our garden this has taken a very long time to reach sufficient height to be able to twine up into shrub branches. Despite its slowness, its foliage is so very showy that we have not complained. The all-gold foliage is pinnate in arrangement with individual leaves tapering at their tips. Flowers, which have as yet been scarce, are five-lobed and appear in clusters of five. To date this had not grown above five feet.  Summer. bloom   5 ft. to date

553-006D4     Jasminum x stephanense       
Sun, Part Shade     Zones 7, 8, 9, 10 Pale Pink flowers
This cross between J. beesianum and J. officinale has resulted in a vigorous vine that is hardier than the former and has pink flowers. Its fragrance and its ability to cover large fences has endeared Jasminum x stephanense to gardeners trying to hide a chain-link fence or similar structure. Somewhat rounded lance-shaped leaves are attractive throughout the growing season.  Early to midsummer. bloom   15 ft.

402-001D4     Jeffersonia diphylla     ( Twinleaf )     
Shade, Part Shade     Zones 5, 6, 7, 8, White flowers
Jeffersonia diphylla is another plant that our visitors invariably are drawn to and one that we never have enough of. As the name indicates, it has two leaves. They are kidney shaped and about 6 inches wide. In late spring a slender stalk arises with a single cup-shaped flower. The subsequent seed capsule is also attractive.  Late spring. bloom   8 in. x 6 in.

552-001D4     Juniperus communis 'Compressa'       
Sun     Zones 2, 3, 4, 5, 6, 7, 8
Juniperus communis 'Compressa' appears like a narrow blue exclamation point in the garden. This upright, slow-growing, dwarf conifer is an excellent addition to the mixed border, as well as in troughs and containers. Its verticality and its neutral blue green compact foliage make it a very versatile element for small or large gardens. One of the surprises from our experiences growing Juniperus communis `Compressa' in our display gardens is its performance under different conditions. In one place we grow Juniperus communis 'Compressa' in a low water requirement gravel garden (watered 3 times a summer) with very little organic matter available in the soil which in summer is baked by the sun from after 11 a.m. until sunset. Here the plant grows about 3"-4" a year, is no more than 8" wide and 42" tall after nearly 8 years and the foliage is loosely compact. In another full sun garden where the well drained soil is top dressed with aged hemlock bark compost and the plant receives irrigation about once every two weeks in the dry parts of the summer (July-Mid September) the plant grows quite differently. In this bed, the plant grows about 6" a year, is nearly 18" wide and 8' tall after about 8 years and the foliage density is very compact. I notice that many customers reach out and touch the foliage to feel and better the texture.    72 in. x 18 in.

188-002D4     Kirengeshoma koreana       
Part Shade     Zones 5, 6, 7, 8 Soft Yellow flowers
Kirengeshoma koreana is a woodland relative of the hydrangea that blooms just in time to refresh the heat-stressed August garden. The waxy, down-facing flowers are soft yellow, reminiscent of a daylily in texture. The foliage is basically rounded, somewhat palmate, 5 inches long and 4.5 inches wide. Try this with Hakonechloa macra 'Aureola' nearby.  Summer. bloom   3 ft. x 3 ft.

188-001-D4     Kirengeshoma palmata       
Part Shade     Zones 5, 6, 7, 8 Rich Yellow flowers
The leaves of Kirengeshoma palmata are larger and more deltoid in shape than K. koreana. They are more blue-green and rougher to the touch. Also, the flowers are larger and a brighter yellow in color. A fine addition to our woodland garden.  Summer. bloom   3 ft. x 2.5 ft.

042-001     Knautia arvensis       
Sun     Zones 5, 6, 7, 8, 9 Pale Powder Blue flowers
Knautia arvensis is a generous perennial that produces numerous 1 1/2-inch pin-cushion flowers over an exceptionally long time. Perfect to blend into a warm sunny border, but it will even tolerate difficult part shade situations. This is a plant that is eager to solve garden problems.  Midsummer to autumn. bloom   2-4 ft. x 2 ft.

042-002     Knautia macedonica       
Sun     Zones 5, 6, 7, 8, 9 Dark Red flowers
Balkans. Knautia macedonica is a large, clump-forming perennial with much branched stems bearing many long-lasting, pincushion flowers of dark red from early summer into the fall.  Early summer to fall. bloom   2-3 ft. x 18 in.

042-004     Knautia macedonica `Mars Midget'       
Sun     Zones 4, 5, 6, 7, 8 Ruby Red flowers
We have grown Knautia macedonica and our selection 'Ruby Star' for two decades. We are happy to have yet another selection to offer, Knautia macedonica 'Mars Midget.' As the name indicates, this is a shorter, tighter selection. The richly colored, pin-cushion flowers measure two inches across and appear in great numbers throughout the summer. A light dead-heading promotes new growth and keeps the plant looking its best.  July to September. bloom   1-1.5 ft. x 1-1.5 ft.

042-003     Knautia macedonica 'Ruby Star'       
Sun     Zones 5, 6, 7, 8, 9, 10 Dark Red flowers
Knautia macedonica 'Ruby Star' is a Joy Creek Selection. At half the height of the species, it is easy to fit this in any sunny border. We grow ours in the red area of the Four Seasons Garden. The small pincushion flowers are a very dark ruby with the hint of a white star within.  Summer to fall. bloom   18 in. x 1 ft.

043-018D4     Kniphofia 'Apricot'       
Sun     Zones 6, 7, 8, 9 Ripe Apricot flowers
Kniphofia 'Apricot' is a mid-sized red-hot poker with good green strap-like foliage and spikes of apricot flowers luminescent within the blades. A hummingbird's delight.  Summer. bloom   36 in. x 24 in.

043-002D4     Kniphofia 'Bressingham Comet'       
Sun     Zones 7, 8, 9, 10 Coral/Yellow flowers
Kniphofia 'Bressingham Comet' is a very long blooming form with grass-like foliage that arches and trails on the ground. The brilliant coral pokers (the base flowers are yellow) light up the surrounding Penstemon 'Blue Midnight' and Nepeta 'Walkers Low' in our garden. The bloom head is 5 inches long.  Summer. bloom   33 in. x 15 in.

043-005D4     Kniphofia citrina       
Sun     Zones 7, 8, 9 Tangerine flowers
Kniphofia citrina is a vigorous increaser. 22-inch long leaves taper to a point from a one-inch base. 30-inch stems bear 6- to 7-inch long flower heads. The apical flowers are tangerine, the lower flowers begin green yellow, age to yellow and then fade to creamy green.  Late spring to early summer. bloom   30 in.

043-003D4     Kniphofia 'Cobra'       
Sun     Zones 6, 7, 8, 9 Tangerine flowers
The name Kniphofia 'Cobra' aptly describes the shape of the flower heads which are broad at their tops and taper at their bases. Flowers open from the bottom of the spike upward, fading to cream as they age. The wide, triangular grass-like blades are 26 inches long. They are semi-evergreen.  Summer. bloom   5-6 ft. x 3 ft.

043-012D4     Kniphofia 'Coral Glow'       
Sun     Zones 7, 8, 9, 10 Tangerine flowers
The pokers of Kniphofia 'Coral Glow' are a uniform tangerine in color rising to three feet above a clump of mid-green, broad, strap foliage.  Summer. bloom   36 in. x 24 in.

043-014-1     Kniphofia linearifolia       
Sun     Zones 7, 8, 9 Pale Tangerine flowers
Kniphofia linearifolia produces very wide apple green foliage that is 49 inches long. This late flowering plant has stems reaching an amazing 7 ft. The upper flowers are pale tangerine aging to coral. The lower flowers are soft yellow. This is extremely vigorous and sends up many bloom spikes.  Late summer. bloom   7 ft. x 5 ft.

043-031D4     Kniphofia 'Maid of Orleans'       
Sun     Zones 6, 7, 8, 9 Yellow flowers
The narrow, green, deciduous leaves or Kniphofia 'Maid of Orleans' are only 15 inches long but the dramatic bloom spikes can reach 4 feet. The tubular yellow flowers fade to ivory as they age.  Mid- to late summer. bloom   4 ft. x 18 in.

043-022D4     Kniphofia nelsonii       
Sun     Zones 7, 8, 9 Apricot flowers
The immense aloe-like leaves of Kniphofia nelsonii are more than 3 inches wide and deeply folded along their central ribs. The glaucous blue leaves are stiff, reaching 20 inches. The flowering stems are very stout and 18 inches tall.  Summer. bloom   18 in.

043-001D4     Kniphofia 'Orange Crush'       
Sun     Zones 7, 8, 9 Orange flowers
Kniphofia 'Orange Crush' is a Joy Creek Introduction. Mike spotted this wonderful seedling that produces huge spikes the color he likes to call "orange crush." Spectacular broad foliage. Semi-evergreen for us.  Summer to fall. bloom   4 ft. x 2.5-3 ft.

043-027D4     Kniphofia pauciflora       
Sun     Zones 7, 8, 9 Yellow flowers
Kniphofia pauciflora is a narrow-leaved perennial with 9- to 12-inch long blades folded deeply along the midrib. Burnt coral buds appear in a sparse arrangement on the flowering stem. The tubular flowers mature to yellow.  Early summer. bloom   18 in.

043-024D4     Kniphofia 'Shining Sceptre'       
Sun     Zones 6, 7, 8, 9 Clear Yellow flowers
Kniphofia 'Shining Sceptre' is an early flowering red-hot poker with arching grass-like foliage reaching 32 inches long. The upper flowers begin dull apricot and mature to bright apricot. The lower flowers are lemon yellow. The two- to three-foot flower stems are copper colored.  Early summer. bloom   2-3 ft. x 2 ft.

043-023D4     Kniphofia 'Sunningdale Yellow'       
Sun     Zones 7, 8, 9 Yellow Green flowers
Early, long blooming and rapid growing. The broad glaucous leaves of Kniphofia 'Sunningdale Yellow' are 24 inches long. The 51-inch stems are powdery blue. They bear nine-inch terminal clusters of yellow green tubular flowers. The flowers age to yellow and turn bright apricot gold before they fade.  Summer. bloom   2-4 ft.

043-026D4     Kniphofia 'Toffee Nosed'       
Sun     Zones 7, 8, 9 Pale Green flowers
Thanks to our friends Ernie and Marietta O'Byrne at NW Garden Nursery who introduced us to Kniphofia 'Toffee Nosed'. The flowers are pale green fading to white. The inflorescence is tipped in toffee color just as the name implies.  Summer. bloom   3 ft. x 18 in.

043-004D4     Kniphofia triangularis       
Sun     Zones 4, 5, 6, 7, 8, 9 Red Orange flowers
Kniphofia triangularis (galpinii) is a late blooming species with narrow grass-like foliage that stands erect. The bloom spikes rise and bloom within the foliage, not above it. The dense clusters of tangerine colored tubular flowers are a gorgeous sight.  Late summer. bloom   3 ft. x 18 in.

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