Luminous chartreuse
Young growth ranges from greenish yellow to lemon yellow while retaining a fine texture.
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Family: Cupressaceae · Pot diameter: 19cm · Height: 25cm
Juniperus horizontalis Limeglow™ (‘NOSlg’) is a luminous conifer with an airy, spreading vase silhouette that seems to open towards the light. Its branches radiate from the centre and gently lift their tips, creating layered movement instead of a solid mass. A palette of electric chartreuse and lemon yellow illuminates dark foliage and grey stone, while the fine texture brings energy, depth and an elegantly free character to the composition.
At the front of a contemporary planting, above a low wall or within a broad container, its open form reads as a bright brushstroke. The lifted tips soften strict geometry and converse beautifully with plum foliage, blue tussocks and rugged mineral surfaces, giving the composition crisp rhythm and sculptural tension.
An airy, spreading vase form with radiating branches, lifted tips and a natural seasonal colour shift.
Young growth ranges from greenish yellow to lemon yellow while retaining a fine texture.
Branches radiate from the centre and lift their tips rather than lying completely flat.
Chartreuse turns orange, bronze or burnished gold in cold weather.
Why you will love it: it provides an unusual dose of luminous colour and sculptural movement without dominating the composition vertically.
Plant it in a sunny foreground, in a rock garden, in a broad container or above a low wall, where the lifted tips can be seen. For group planting, space plants 1–1.2m apart, centre to centre, and provide prompt drainage.
Electric yellow-green gains depth beside purple foliage, blue tussocks and pink flowers.
Full sun gives the strongest chartreuse; light partial shade is tolerated but produces greener foliage.
Water regularly until established, then deeply and less often; never allow prolonged waterlogging.
Very cold hardy at RHS H7 and USDA zone 3, and drought resistant once established.
Do not eat any part and wear gloves; the foliage may irritate sensitive skin.
Give abundant light and open space around the centre so lateral branches and lifted tips remain visible.
Water deeply during the first season and in prolonged summer drought, letting the surface dry between soakings.
Use any acidic, neutral or alkaline soil that stays moderately cool yet drains freely.
Apply a light evergreen feed in spring only when growth is weak.
Routine shearing is unnecessary; remove dead material and shorten only young green tips.
Orange and bronze tones are a natural seasonal phase; the foliage returns to chartreuse with fresh extension.
Choose a broad pot with free drainage and protect the root zone from persistent winter saturation.
Wear gloves, avoid contact with eyes and mouth, and keep clippings away from children and animals.
New growth opens brightly at the ends of radiating branches.
Branches radiate into a broad vase-shaped line and lift their tips.
Cold weather warms the foliage colour without causing leaf fall.
Mature Juniperus horizontalis Limeglow™ (‘NOSlg’) forms an airy, broad vase. Its branches radiate from the open centre and lift at their tips, so the side elevation clearly expresses its spreading, lightweight architecture.
The drawings retain the vase-shaped branching and change the shoot length and genuine seasonal colour.
What to expect after planting: Once established, each spring extension opens the vase-shaped perimeter a little farther. Summer chartreuse gives way to warm bronze in winter and returns with fresh tips.
The documented story of Juniperus horizontalis Limeglow™ (‘NOSlg’) begins with a yellow sport on Juniperus horizontalis ‘Youngstown’, selected by Larry Hatch in association with North Carolina State University.
From that single shoot, the selection was propagated vegetatively so its bright chartreuse foliage and airy, spreading vase form would remain true from plant to plant.
It entered commerce under the full identity Juniperus horizontalis Limeglow™ (‘NOSlg’). The precise year and place of selection, as well as the date of its first propagation, are not securely recorded.
Its fine feathery appearance comes largely from pointed juvenile foliage rather than the broad scale-leaved fans seen in some other conifers.
A colour mutation on one shoot can become a cultivar when it is propagated vegetatively and proves stable.
Cold and strong light favour protective pigments that shift chartreuse towards orange, bronze or burnished gold.
Six specific answers about identity, origin, size, colour, light and watering.
The introducer’s styling is Juniperus horizontalis Limeglow™ (‘NOSlg’); RHS also records the name as J. horizontalis ‘Limeglow’.
Larry Hatch selected it, working with North Carolina State University, as a yellow sport of Juniperus horizontalis ‘Youngstown’.
Allow about 0.6m in height and 1.2m in spread.
This is a natural winter response to cold and light. Fresh spring tips return to chartreuse.
Full sun gives the strongest yellow-green. Light partial shade is tolerated, but foliage becomes greener.
Yes, once established, although it needs deep watering during its first season and in prolonged summer drought.