Creeping Jenny

Lysimachia nummularia

Stem Plant
Midground
Background

A versatile stem plant with distinctive round, coin-like opposite leaves. While it forms a creeping carpet in its terrestrial form, it typically grows rigidly upward when submerged in an aquarium. It is particularly valued for its robust nature and ability to thrive in cooler water temperatures and unheated setups.

Creeping Jenny At a Glance

Max Height40 cm
Max Spread5 cm
Growth RateFast
LightModerate
CO2No added CO2 needed
DifficultyBeginner
MaintenanceModerate
PlacementMidground and Background
Water TypeFreshwater Only
FlowModerate (Standard)

Creeping Jenny Care and Setup

Planting MethodRooted in substrate
SubstrateInert substrate is fine
Feeding StrategyWater column feeder
Nutrient DemandLow nutrient demand
Leaf TextureStandard
Emersed GrowthPossible

Layout Fit

Creeping Jenny usually works best from the midground into the background and needs enough room to mature at about 40 cm tall and 5 cm wide.

Water Window

Aim for freshwater conditions with a steady current, plus 10 to 26 °C, pH 6 to 8, and 4 to 15 dGH.

Upkeep Rhythm

Expect fast growth with moderate maintenance. Routine trimming keeps it tidy and stops it from drifting into neighboring space.

Creeping Jenny Care Guide Summary

The Creeping Jenny is a stem plant that usually works best from the midground into the background. Give it room to reach about 40 cm tall and 5 cm wide, so the mature plant still fits the layout. It tends to look its best when the light, feeding, and trimming routine stay predictable from week to week. In day-to-day care, it responds best to moderate light, freshwater conditions, and a steady current. It usually grows well without added CO2. Keep this species within a comfortable range of 10 to 26 °C, pH 6 to 8, and 4 to 15 dGH.

Creeping Jenny Planting, Feeding & Maintenance

The Creeping Jenny does best when the setup matches the way it naturally grows. Plant it with enough room for the crown and new roots to establish cleanly. Most of its nutrition comes from the water column, so steady liquid fertilization matters more than heavy root feeding. An inert substrate is workable as long as the rest of the fertilization plan is consistent. Keep the routine steady: moderate light and low nutrient demand usually give better results than big swings from week to week. This plant can also adapt to emersed growth, which is useful for growers who propagate outside the display tank.

Creeping Jenny Compatibility

Use these signals as quick context, not hard rules. They help you judge how well Creeping Jenny is likely to stay in place, tolerate curious fish, and contribute real cover in a mixed planted tank.

Palatability to FishLow
Uproot ResistanceLow
Cover DensityModerate
Shade CastLow
Growth AggressionModerate

Aquarium Benefits

Breaks lines of sight
Good refuge for fry

The Creeping Jenny can work very well in a mixed tank, but its value depends on how well it handles fish pressure and how much usable cover it really provides. It is less likely to be chewed by curious fish, and its standard leaves usually help it hold up in calm community tanks. Its anchoring strength is limited early on, so avoid pairing it with persistent diggers or boisterous substrate movers. It adds some usable cover without turning the layout into a dense thicket. It does not block much light, making it easier to mix with smaller plants nearby. Aquarists also lean on it for breaking up sight lines and shelter for fry, not just for appearance.

Creeping Jenny Propagation

This species is usually propagated by stem cuttings. With fast growth and moderate upkeep, it stays manageable with routine thinning and trimming. That gives you a better sense of whether simple trimming is enough or whether it is smarter to plan division, replanting, or thinning before the layout closes in.

Stem cuttings

Creeping Jenny Variants

Trade names and cultivated forms do not always change how a plant behaves in the tank. The notes below call out the differences that actually matter in care and layout planning, while anything not mentioned still follows the base profile.

Aurea

A striking golden-leaved cultivar that provides bright yellow and light green contrast in the aquascape. It requires higher light intensity than the wild green form to maintain its vibrant coloration and tends to have a slightly slower growth rate.

Compared with the base plant, it leans toward moderate growth, high light, added CO2 helps, and moderate nutrient demand nutrient demand.

Also known as: Golden Creeping Jenny, Lysimachia nummularia Aurea, Golden Moneywort

Growth RateModerate
LightHigh
CO2Added CO2 helps
Nutrient DemandModerate nutrient demand

Frequently Asked Questions About Creeping Jenny

Is Creeping Jenny a good beginner aquarium plant?

It sits somewhere in the middle. As a beginner species with moderate maintenance needs, it is a better fit once you already have the basics of light, feeding, and trimming under control.

Where should Creeping Jenny be placed in an aquarium?

This plant usually looks best from the midground into the background. At full size it can reach about 40 cm tall by 5 cm wide, so leave room for it to mature. It is best rooted into the substrate.

Does Creeping Jenny need strong light or CO2?

For the best results, provide it with moderate lighting. Additionally, it usually grows well without added CO2.

What water conditions suit Creeping Jenny?

Aim for freshwater conditions, a steady current, and a range around 10 to 26 °C, pH 6 to 8, and 4 to 15 dGH to keep this species inside its comfort zone.

How does Creeping Jenny spread or help the aquarium?

It is usually propagated by stem cuttings. In the display tank, aquarists value this plant for breaking up sight lines and shelter for fry.


Related plant profiles

These cards open plant profiles directly. They are chosen by overall care, layout, and growth-pattern similarity, rather than a side-by-side comparison guide.

Dwarf Hairgrass

Eleocharis parvula

Stolon / Runner Plant
Foreground
Carpeting
IntermediateModerate

A highly popular and classic carpeting plant that forms a dense, lawn-like grass in the aquarium. While it can survive in lower-tech setups, it requires moderate to high light and CO2 injection to form a thick, vibrant carpet rapidly. It spreads horizontally via runners.

Glosso

Glossostigma elatinoides

Stolon / Runner Plant
Foreground
Carpeting
AdvancedHigh

Glossostigma elatinoides, commonly known as Glosso, is a classic and highly popular aquarium carpeting plant native to the swamps and bogs of Australia and New Zealand. Prized for its ability to form a dense, bright green mat along the aquarium floor, it is often a centerpiece in high-tech nature aquariums. It is a demanding plant that requires intense lighting and carbon dioxide supplementation to creep horizontally; without these, it tends to grow leggy and vertical. Frequent trimming is necessary to prevent the carpet from overgrowing itself, which can lead to the lower layers dying off and the mat detaching from the substrate.

Creeping Ludwigia

Ludwigia repens

Stem Plant
Midground
Background
BeginnerModerate

A classic, highly adaptable stem plant known for its oval leaves that develop attractive reddish hues under good lighting. It is one of the easiest red plants to grow in the aquarium, making it a popular choice for beginners looking to add contrast to their aquascape.

Baby Tears

Lindernia rotundifolia

Stem Plant
Midground
Background
BeginnerModerate

An attractive and relatively undemanding stem plant featuring small, round, bright green leaves with distinctive parallel venation. It grows straight up toward the light and branches out to form dense bushes when trimmed regularly, making it an excellent background or midground accent.

Christmas Moss

Vesicularia montagnei

Moss / Liverwort
Attached to hardscape
Foreground
BeginnerModerate

A highly popular aquarium moss characterized by its distinct, triangular fronds that closely resemble miniature pine branches. It forms dense, lush bushes when attached to hardscape and provides excellent hiding spaces for shrimp and fry.

Weeping Moss

Vesicularia ferriei

Moss / Liverwort
Attached to hardscape
Foreground
BeginnerModerate

A highly popular aquatic moss known for its distinct downward-drooping growth habit, reminiscent of a miniature weeping willow tree. It is most effective when attached to driftwood or overhanging hardscape to emphasize its cascading form.