Repotting guide
When & how to repot Lemon Catnip (Nepeta cataria 'Citriodora')
Also called Lemon Catnip, Citron Catnip.
More about lemon catnip
About Lemon Catnip
Nepeta cataria 'Citriodora' · also called Lemon Catnip, Citron Catnip · herb
Lemon Catnip is a lemon-scented cultivar of common catnip that is less attractive to cats than the species. It thrives in full sun with well-drained soil and is drought-tolerant once established. Bees and butterflies love it. Cut back after flowering to encourage a second flush and prevent self-seeding.
Mature size: 60–90 cm tall, 45–60 cm wide
Watch for — Floppy, sprawling stems: Caused by too much shade or over-fertilising with nitrogen. Move to full sun and cut back to 10 cm after the first flush to stimulate compact regrowth.
How to tell lemon catnip needs repotting
Repotting on a calendar is less reliable than reading the plant. For lemon catnip, watch for these signs:
- Roots circling the bottom of the module or pot, or poking out of the drainage holes.
- The seedling dries out within a day and growth has visibly stalled.
- Roots are white and matted in a tight spiral when you tip the plant out.
- It has outgrown its current container for the stage of the season — pot lemon catnip on before it becomes hard root-bound.
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 lemon catnip
Pot on seedlings as they grow; not a perennial repot. Lemon Catnipis grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Upright, mounding herbaceous perennial.
What size pot to step lemon catnip up to
Pot lemon catnip on gradually — a seedling jumped straight into a huge pot sits in cold, wet, airless soil and stalls. Step up one or two sizes at a time as the roots fill each container, finishing in a large final pot or the ground. The aim is roots that never circle and never check.
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 lemon catnip
Pot lemon catnip on through the active growing season, whenever roots fill the current container — there is no single date, just "before it becomes root-bound". Avoid potting on during a cold snap.
Step-by-step: repotting lemon catnip
- Pot on before it is root-bound. Check lemon catnip regularly; move it up as soon as roots reach the edge of the cell or pot, not after they have circled.
- Step up one or two sizes. Choose the next container up — not a giant one. Cold, wet, unused soil around a small root system stalls seedlings.
- Knock it out gently. Support the stem, tip the pot, and ease the rootball out without breaking it. A little teasing of circled roots at the base is fine.
- Pot into rich mix. Set it into fresh lean, well-drained loam or sandy loam; ph 6.0–7.5 at the same depth (tomatoes are the exception — they can go deeper to root along the stem).
- Water in and grow on. Water well, keep it in good light, and resume feeding once it is established and growing again.
Aftercare
Water lemon catnip in well and keep it in bright light; a freshly potted-on seedling can wilt for a day while roots settle, so do not overcompensate by drowning it. Do not fertilise for about 1 week — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.
The right soil mix for lemon catnip
Lemon Catnip wants lean, well-drained loam or sandy loam; ph 6.0–7.5. Avoid rich, moisture-retentive soils — excess fertility promotes lush but floppy growth with fewer blooms. Good drainage is essential; standing water around the crown is fatal. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.
Repotting lemon catnip — frequently asked questions
How often should you repot lemon catnip?
Pot on seedlings as they grow; not a perennial repot for lemon catnip. Lemon Catnip is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into lean, well-drained loam or sandy loam; ph 6.0–7.5 so the roots never circle the cell, ending in a large final container. A root-bound transplant stalls and never fully recovers.
What size pot does lemon catnip need?
Pot lemon catnip on gradually — a seedling jumped straight into a huge pot sits in cold, wet, airless soil and stalls. Step up one or two sizes at a time as the roots fill each container, finishing in a large final pot or the ground. The aim is roots that never circle and never check. Use our pot size calculator to size it from the plant's current pot and root spread.
When is the best time of year to repot lemon catnip?
Pot lemon catnip on through the active growing season, whenever roots fill the current container — there is no single date, just "before it becomes root-bound". Avoid potting on during a cold snap.
Can you put lemon catnip straight into a much bigger pot?
No. Even a fast-growing lemon catnip should only go up one pot size at a time. A vastly oversized pot holds a reservoir of wet soil the roots cannot reach, which stays cold and soggy and rots the roots — the opposite of what you wanted.
Should you fertilise lemon catnip after repotting?
Not immediately. Wait about 1 week after repotting lemon catnip. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.
Related guides
- Lemon Catnip care — light, water, soil and common problems
- How often to water lemon catnip — the watering brief
- How to repot a plant — the complete step-by-step method
- Root-bound plant — how to spot and fix it
- Pot size calculator — size the next pot correctly
- When & how to repot psyllium
- When & how to repot fragrant agrimony
- When & how to repot white horehound
- All 8452 repotting guides in the Growli library