Repotting guide

When & how to repot Quedlinburg Lemon Balm (Melissa officinalis 'Quedlinburger Niederliegende')

Also called Quedlinburg Lemon Balm, Quedlinburg Prostrate Lemon Balm.

More about quedlinburg lemon balm

About Quedlinburg Lemon Balm

Melissa officinalis 'Quedlinburger Niederliegende' · also called Quedlinburg Lemon Balm, Quedlinburg Prostrate Lemon Balm · herb

Quedlinburg Lemon Balm is a low-growing, spreading German cultivar of Melissa officinalis selected for high essential oil content. Its prostrate habit makes it ideal for ground cover, edging, and mass production of herb material. Strong lemon scent with excellent vigour, it is popular in European medicinal herb cultivation and is fully cold-hardy.

Mature size: 15–25 cm tall (6–10 in), 50–80 cm wide

Watch for — Self-seeding and spread: Produces viable seed freely and can spread beyond intended boundaries. Deadhead before seed set or use a root barrier in formal plantings. Its spreading habit is an asset in production but a risk in mixed borders.

How to tell quedlinburg lemon balm needs repotting

Repotting on a calendar is less reliable than reading the plant. For quedlinburg lemon balm, 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 quedlinburg lemon balm 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 quedlinburg lemon balm

Pot on seedlings as they grow; not a perennial repot. Quedlinburg Lemon Balmis grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Prostrate, spreading herbaceous perennial.

What size pot to step quedlinburg lemon balm up to

Pot quedlinburg lemon balm 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 quedlinburg lemon balm

Pot quedlinburg lemon balm 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 quedlinburg lemon balm

Pot on before it is root-bound. Check quedlinburg lemon balm 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 average to moderately fertile, well-draining loam or sandy loam 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 quedlinburg lemon balm 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 quedlinburg lemon balm

Quedlinburg Lemon Balm wants average to moderately fertile, well-draining loam or sandy loam. Tolerates a wide range of soils with pH 6.0–7.5. Its prostrate growth suits slightly leaner soils that prevent overly lush, rank growth. Ensure free drainage, particularly in winter to prevent crown rot. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting quedlinburg lemon balm — frequently asked questions

How often should you repot quedlinburg lemon balm?

Pot on seedlings as they grow; not a perennial repot for quedlinburg lemon balm. Quedlinburg Lemon Balm is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into average to moderately fertile, well-draining loam or sandy loam 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 quedlinburg lemon balm need?

When is the best time of year to repot quedlinburg lemon balm?

Can you put quedlinburg lemon balm straight into a much bigger pot?

No. Even a fast-growing quedlinburg lemon balm 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 quedlinburg lemon balm after repotting?

Not immediately. Wait about 1 week after repotting quedlinburg lemon balm. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.