Repotting guide

When & how to repot Golden Lemon Thyme (Thymus citriodorus 'Aureus')

Also called Golden Lemon Thyme, Lemon Thyme 'Aureus'.

More about golden lemon thyme

About Golden Lemon Thyme

Thymus citriodorus 'Aureus' · also called Golden Lemon Thyme, Lemon Thyme 'Aureus' · herb

Golden Lemon Thyme is an ornamental-culinary hybrid thyme with bright gold-edged leaves and a distinctive citrus-lemon scent. It forms a low, spreading mound and produces pale lilac flowers in summer. Used fresh in salads, poultry, and fish dishes, it needs full sun to maintain its golden variegation and flavour.

Mature size: 20–30 cm tall, 30–45 cm wide

Watch for — Root rot in wet soil: Soggy or compacted soil causes rapid crown rot, especially in winter. Ensure sharp drainage and, in containers, use a terracotta pot with drainage holes. Never let roots sit in standing water.

How to tell golden lemon thyme needs repotting

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

Every 2–3 years, into bone-dry mix. Golden Lemon Thyme's growth habit — low mounding, spreading subshrub; semi-evergreen — sets the pace. Golden Lemon Thyme is an ornamental-culinary hybrid thyme with bright gold-edged leaves and a distinctive citrus-lemon scent. It forms a low, spreading mound and produces pale lilac flowers in summer. Used fresh in salads, poultry, and fish dishes, it needs full sun to maintain its golden variegation and flavour.

What size pot to step golden 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. Golden 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 golden lemon thyme

Spring or summer, while golden 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 golden lemon thyme

Repot dry. Do not water golden 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 loam 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 golden 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 golden 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 golden lemon thyme

Golden Lemon Thyme wants light, gritty, free-draining loam. A 50:50 mix of multi-purpose compost and horticultural grit is ideal. Good drainage is non-negotiable. pH 6.0–7.5. In borders, improve heavy soil with grit before planting. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting golden lemon thyme — frequently asked questions

How often should you repot golden lemon thyme?

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

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

Should you water golden lemon thyme after repotting?

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

Not immediately. Wait about 3 weeks after repotting golden 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.