Repotting guide

When & how to repot Headed Thyme (Thymus capitatus)

Also called Headed Thyme, Conehead Thyme, Spanish Oregano.

More about headed thyme

About Headed Thyme

Thymus capitatus · also called Headed Thyme, Conehead Thyme · herb

Headed Thyme is a robust, strongly aromatic Mediterranean species with distinctive dense, cone-shaped flowerheads of deep pink-purple blooms. Native to rocky hillsides from Spain to the Middle East, it is used culinarily in Greek and Middle Eastern cuisines as a substitute for oregano. It demands full sun and exceptional drainage.

Mature size: 30–50 cm tall, 40–60 cm wide

Watch for — Root and crown rot: The primary threat in cooler, wetter climates. Wet winter soil quickly rots the woody crown. Grow on a slope, in raised gravel beds, or in containers that can be moved under cover. Never allow standing water around roots.

How to tell headed thyme needs repotting

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

Every 2–3 years, into bone-dry mix. Headed Thyme's growth habit — erect to spreading woody subshrub; evergreen — sets the pace. Headed Thyme is a robust, strongly aromatic Mediterranean species with distinctive dense, cone-shaped flowerheads of deep pink-purple blooms. Native to rocky hillsides from Spain to the Middle East, it is used culinarily in Greek and Middle Eastern cuisines as a substitute for oregano. It demands full sun and exceptional drainage.

What size pot to step headed thyme up to

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

Spring or summer, while headed 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 headed thyme

Repot dry. Do not water headed 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 poor, rocky, very free-draining alkaline 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 headed 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 headed 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 headed thyme

Headed Thyme wants poor, rocky, very free-draining alkaline soil. Prefers calcareous (limestone-based) or sandy, lean soil. Avoid rich composts entirely — they promote lush, disease-prone growth. Use a gritty alpine mix or 60% coarse grit: 40% loam. pH 7.0–8.5. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting headed thyme — frequently asked questions

How often should you repot headed thyme?

Every 2–3 years, into bone-dry mix for headed thyme. Repot headed thyme every 2–3 years into a snug pot of poor, rocky, very free-draining alkaline 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 headed thyme need?

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

Should you water headed thyme after repotting?

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

Not immediately. Wait about 3 weeks after repotting headed 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.