Repotting guide

When & how to repot Lemon Thyme (Thymus citriodorus)

Also called Citrus Thyme.

More about lemon thyme

About Lemon Thyme

Thymus citriodorus · also called Citrus Thyme · herb

Lemon Thyme is a low, woody Mediterranean herb with small evergreen leaves carrying a bright lemon-thyme scent, excellent for poultry, fish and roasted vegetables. A hardy, drought-tolerant subshrub, it craves full sun and sharp drainage and resents wet feet. Light trimming keeps it compact, and it doubles as a fragrant edging or container plant.

Mature size: 15-30 cm tall, spreading 20-40 cm

Watch for — Root rot from overwatering: Soggy soil quickly rots the roots and crown. Plant in gritty, free-draining soil and water sparingly, letting it dry between drinks.

How to tell lemon thyme needs repotting

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

Every 2–3 years, into bone-dry mix. Lemon Thyme's growth habit — low, woody-based evergreen subshrub forming a spreading, slightly mounding cushion of small leaves with pale pink to lilac summer flowers loved by bees. — sets the pace. Lemon Thyme is a low, woody Mediterranean herb with small evergreen leaves carrying a bright lemon-thyme scent, excellent for poultry, fish and roasted vegetables. A hardy, drought-tolerant subshrub, it craves full sun and sharp drainage and resents wet feet. Light trimming keeps it compact, and it doubles as a fragrant edging or container plant.

What size pot to step lemon thyme up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Lemon Thyme 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 lemon thyme

Spring or summer, while lemon thyme 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 lemon thyme

Repot dry. Do not water lemon thyme 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 light, gritty, free-draining soil 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 lemon thyme 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 lemon thyme 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 lemon thyme

Lemon Thyme wants light, gritty, free-draining soil. Lean, sharply drained sandy or gravelly soil, pH 6.0-8.0. It thrives in poor ground; mix grit or sand into containers and avoid rich, moisture-holding mixes that rot the roots. 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 thyme — frequently asked questions

How often should you repot lemon thyme?

Every 2–3 years, into bone-dry mix for lemon thyme. Repot lemon thyme every 2–3 years into a snug pot of light, gritty, free-draining soil, 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 lemon thyme need?

When is the best time of year to repot lemon thyme?

Should you water lemon thyme after repotting?

No — not straight away. Repot lemon thyme 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 lemon thyme after repotting?

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