Repotting guide

When & how to repot Miniature Creeping Jenny (Lysimachia japonica 'Minutissima')

Also called Miniature Creeping Jenny, Japanese Creeping Jenny Minutissima.

More about miniature creeping jenny

About Miniature Creeping Jenny

Lysimachia japonica 'Minutissima' · also called Miniature Creeping Jenny, Japanese Creeping Jenny Minutissima · flowering

Miniature Creeping Jenny is a tiny, mat-forming ground cover with delicate, rounded chartreuse leaves and small yellow flowers in summer. Perfect for alpine troughs, the edges of containers, terrariums, and between paving stones, it forms a dense, low carpet. Requires consistent moisture and partial shade to prevent leaf scorch.

Mature size: 1–3 cm tall (0.5–1 in), spreading 15–30 cm (6–12 in) over time

Watch for — Drying out and wilting: The shallow, fine root system dries out very quickly in hot weather or porous substrates. Maintain consistent moisture by watering frequently and applying a fine mulch or grit dressing around plants. Self-recovers quickly after rehydration if not severely desiccated.

How to tell miniature creeping jenny needs repotting

Repotting on a calendar is less reliable than reading the plant. For miniature creeping jenny, watch for these signs:

Roots growing out of the drainage holes, or the rootball lifting the plant proud of the rim.
Soil that has shrunk away from the pot sides and no longer holds water.
The pot is unstable because the plant has grown top-heavy.
Old, compacted, broken-down mix that stays wet too long — for a succulent that is a rot risk, so refresh it even if the pot size is fine.

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot miniature creeping jenny

Every 2–3 years, into bone-dry mix. Miniature Creeping Jenny's growth habit — tiny, prostrate mat-forming perennial, rooting at nodes as it spreads — sets the pace. Miniature Creeping Jenny is a tiny, mat-forming ground cover with delicate, rounded chartreuse leaves and small yellow flowers in summer. Perfect for alpine troughs, the edges of containers, terrariums, and between paving stones, it forms a dense, low carpet. Requires consistent moisture and partial shade to prevent leaf scorch.

What size pot to step miniature creeping jenny up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Miniature Creeping Jenny stores water and rots in a large pot of slow-drying soil. A tight terracotta pot that dries fast is far safer than a generous plastic one. Never up-pot a succulent by several sizes.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot miniature creeping jenny

Spring or summer, while miniature creeping jenny is in active growth and warm, is best — roots recover fastest then, and the plant is not sitting in cool damp soil. Avoid repotting a succulent in winter dormancy.

Step-by-step: repotting miniature creeping jenny

Repot dry. Do not water miniature creeping jenny for several days first. Working with dry roots and dry mix dramatically lowers the rot risk for a succulent.
Pick a snug, fast-draining pot. Choose terracotta one size up at most, with a drainage hole. Have gritty moist, gritty loam or humus-rich compost ready.
Tip it out and clean the roots. Slide the plant out, crumble off the old soil, and trim any black, mushy or dead roots with clean snips.
Pot into dry mix. Set miniature creeping jenny at its original depth in dry gritty mix, firming gently. Do not bury the stem deeper than it was.
Wait a week before watering. Leave it completely dry and out of harsh sun for about 7 days so any damaged roots callus. Only then water lightly.

Aftercare

Keep miniature creeping jenny completely dry and out of fierce sun for about a week so any nicked roots callus before they meet moisture; watering a freshly repotted succulent is the classic way to rot it. Then resume the normal lean, dry rhythm. Do not fertilise for about 3 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for miniature creeping jenny

Miniature Creeping Jenny wants moist, gritty loam or humus-rich compost. Requires moisture-retentive yet well-aerated soil. Use a mix of loam, fine grit, and compost in alpine troughs to balance drainage with moisture retention. pH 5.5–7.0. Avoid waterlogged or bone-dry substrates, both of which cause rapid decline. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting miniature creeping jenny — frequently asked questions

How often should you repot miniature creeping jenny?

Every 2–3 years, into bone-dry mix for miniature creeping jenny. Repot miniature creeping jenny every 2–3 years into a snug pot of moist, gritty loam or humus-rich compost, ideally in spring or summer. Let it sit in dry soil and do not water for about a week afterwards so any nicked roots can callus. Over-potting and watering straight away is what rots succulents.

What size pot does miniature creeping jenny need?

When is the best time of year to repot miniature creeping jenny?

Should you water miniature creeping jenny after repotting?

No — not straight away. Repot miniature creeping jenny into dry mix and wait about a week before the first watering so any damaged roots callus over. Watering a freshly repotted succulent is the single most common way to rot one.

Should you fertilise miniature creeping jenny after repotting?

Not immediately. Wait about 3 weeks after repotting miniature creeping jenny. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.