Ornamental · Primulaceae
Creeping Jenny
Lysimachia nummularia
A low gold carpet for moist corners in sun or shade, lovely in a setting and spirited enough to ask for a clear edge.
Full sun
Every 2–5 days
USDA 3–9
2–4 in · 5–10 cm
Overview
Creeping Jenny is a low, quick groundcover that pools across damp ground and spills over the rims of pots, walls, and water features. The golden forms lend a setting a quiet chartreuse to gold glow, an easy way to lift a shaded corner, while the plain green species keeps a more restrained, deeper green. A member of the primrose family at home in moisture, it slips naturally into rain gardens and the soft margins of a pond.
The trait that makes it effortless is also what asks for a plan. It roots wherever it touches down, so a small start fills a space within a season and keeps reaching for the next. Hardy from USDA zone 3 to 9 and untroubled by cold to -40°F (-40°C), it becomes a fixture once it has chosen its spot, a dependable backdrop year after year.
Its enthusiasm is the one note to compose around. The green species drifts beyond a garden into wetlands, stream banks, and moist woodlands, and it is listed as invasive or regulated in parts of the US. Framed by a clear edge or held in a container, it is a polished, low carpet that flatters a setting. Set loose near water, it stops serving the design and starts running it.
Care
The short version: keep it evenly moist, then let sun bring the brightest gold to a setting or let shade hold a cooler, scorch-free green. Settle it into rich, damp soil, feed it only rarely, and trim the runners so the carpet stays exactly where the design wants it.
Light
It settles into almost any exposure from full sun to full shade, which makes it easy to place. Full sun draws out the brightest gold for a setting, though it can scorch where the ground dries, so a shadier corner offers a cooler, greener, lower-risk look.
Water
Keep the soil moist to wet at all times, since shallow roots mean the planting falters quickly if it dries. Water every 2 to 5 days, and more in heat, and know it sits happily at a pond edge, even in shallow standing water that suits a water feature.
Soil
Give it rich, damp, humus-rich soil that holds moisture and the look stays full. Beyond that it is forgiving of a site, taking clay, loam, sand, or shallow rocky ground across a wide pH of 5.5 to 8.0, and even an occasional flood.
Temperature
It is a genuinely cold-hardy plant, at ease from about -40°F to 100°F (-40°C to 38°C). That range across USDA zones 3 to 9 is part of why it reads as a permanent fixture in a setting once it establishes.
Humidity
Ordinary outdoor air suits it and there is no figure to chase. What shapes the look is wet feet, not damp air, so the ground matters far more than the atmosphere around it.
Feeding
It asks very little. A single feed of balanced general-purpose fertilizer in spring keeps this low-maintenance carpet looking its part, and many settings do without entirely.
Pruning
Trim or shear the creeping stems whenever the look needs editing to hold the carpet to its lines. Lift out stems that have rooted past the intended edge, the small, satisfying upkeep this plant asks in return for its ease.
Repotting
In a container, refresh or divide it once it crowds and the planting loses its shape. Watch for a mat spilling over the rim, a thinning center, or roots filling the pot, then divide to bring the look back to full.
Size & spacing
Each plant stays low at 2 to 4 inches (5 to 10 cm) tall yet broadens to 12 to 24 inches (30 to 60 cm) across, and keeps reaching. Space with that quick spread in mind, and give the carpet room to pool or a clean edge to settle against.
When to plant
Creeping Jenny is relaxed about when it joins a planting. Set it out in spring once the frost has passed, or in fall, and look for its small yellow cup-shaped flowers to open in early summer around June.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: Spring after frost, or fall
- Harvest: Yellow cup-shaped flowers in early summer (around June)
Hardiness
USDA hardiness zones: 3–9
Temperature: down to -40°C
Troubleshooting
With creeping Jenny, the art is in placement rather than survival, since the plant is hardy by nature. What rewards attention is keeping it within the lines of the design and protecting that gold glow from scorch. Read the setting against the notes below, then step in before a runner or a dry spell rewrites the look.
When the carpet outgrows the room you gave it
The defining tension of this plant is its eager spread, most insistent in the plain green species. Left to its own devices it roots at every node and resprouts from the smallest fragment, so a tidy edge soon blurs and the planting drifts past its setting into wetlands and stream banks. The graceful answer is restraint by design: lift the runners and rooted pieces, shear the patch back to its line, and frame any spot near water with a root barrier or a generous container. For a setting where looks lead, the softer golden 'Aurea' carries the same charm with better manners.
Fix:
- Pull or dig out runners and rooted stem fragments, removing all pieces since fragments resprout
- Shear or mow back regularly to confine the patch
- Install root barriers or grow in containers to limit spread
- Choose the less-aggressive golden 'Aurea' form for ornamental use
When a damp setting frays the carpet's polish
Two things spoil the look in a damp setting: rust and leaf spot diseases, and slugs that can graze a mat back to bare ground where they congregate. Restore the polish by opening the planting for airflow and clearing the worst-marked foliage, then keep slugs in check with traps, baits, or hand removal. Reassuringly, the carpet usually recovers its fullness after the slugs have had their turn.
Fix:
- Improve air circulation and avoid prolonged leaf wetness for disease
- Remove and discard badly affected foliage
- Control slugs with traps, baits, or hand removal
When the golden glow loses its luster in harsh sun
A washed-out, browning carpet is sun scorch, the price of a shallow-rooted plant asked to bake in dry heat. The gold reads most luminous in full sun, yet a hot, parched site dulls that glow and crisps the edges wherever the soil runs short. Keep the ground evenly moist and offer a cooler exposure with afternoon shade in hot southern settings, and the carpet keeps its quiet radiance.
Fix:
- Keep soil consistently moist
- Provide afternoon shade in hot southern climates
- Water more often during heat
Toxicity
A welcome note for a home shared with animals: creeping Jenny is not toxic. Absent from the ASPCA poison lists, it sits easily around cats, dogs, and other pets, with no more than a mild stomach upset should one make a meal of the leaves. The thing to mind is its spreading, not poison, so the work is in keeping it composed rather than out of reach.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
A cat moving through the planting has nothing to fear, since it is not toxic and stays off the ASPCA list. Should one graze a good deal of foliage, expect at most some drool or sick, the mark of a simple upset stomach rather than poisoning.
Dogs None
A dog at home among the greenery is just as safe. A large mouthful of leaves might leave it briefly off-color, and nothing beyond that.
Horses Safe
No toxicity is on record for horses, so a paddock bordered by a patch holds no poisoning concern.
Rabbits Safe
Rabbits may graze the foliage without harm. As with any fresh green added to the routine, ease it in so their digestion settles to it.
Livestock Safe
Cattle, goats, and sheep encounter no known toxic risk where this groundcover grows.
Birds Safe
Birds working through the leaves and stems in the garden meet no toxic threat at all.
People Safe
Working among it and brushing past it pose no risk, with gloves left to preference. It earns its place for the look it lends a setting, not the table, so there is no call to taste it.
No special handling needed for toxicity; gloves optional. The practical caution is containing its aggressive spread, not poisoning.
Varieties
Most plantings call on one of the golden selections rather than the plain green species, for the light they bring to a setting. These two turn up most often.
'Aurea' (Golden Creeping Jenny)
Its coin-shaped foliage reads chartreuse to gold in full sun and settles to lime green in shade, lending a setting a soft glow while spreading a little more politely than the green species yet still filling space fast.
'Goldilocks'
A very low golden-yellow carpet that reaches 1 to 3 feet across, its rounded foliage occasionally easing back to green over the seasons.
How to propagate
Creeping Jenny all but extends itself, a gift when you want a planting to grow and a caution otherwise. Any of three easy methods broadens the carpet within a few weeks.
DivisionEasy
Spring or fall · A few weeks
The simplest way to extend a planting is division in spring or fall. Lift a clump from the edge of an established patch, ease apart the pieces that already carry roots, and set them where you want the look to continue, and they knit in within a few weeks.
Stem cuttingsEasy
Spring through summer · A few weeks
Cuttings take with little effort from spring through summer. Rest a healthy stem on moist soil and it roots at the nodes on its own, giving you a fresh plant to weave into the scheme within a few weeks.
LayeringEasy
Growing season · A few weeks
Layering tends itself across the whole growing season. Trailing stems settle and root wherever a node meets damp ground, establishing within a few weeks and quietly broadening the carpet for you.
Myths
Creeping Jenny is a tidy, well-behaved groundcover you can plant anywhere.
The plain green species is anything but a polite tenant: it roots at every node, slips beyond its setting, and moves into wetlands, stream banks, and moist woodlands, and it is listed as invasive or regulated in parts of the US. The elegant course is to place it with intention and keep it contained, choosing the gentler golden 'Aurea' where the planting is meant to be admired.