Repotting guide

When & how to repot Marseille Germander (Teucrium massiliense)

Also called Marseille Germander, Hybrid Germander.

More about marseille germander

About Marseille Germander

Teucrium massiliense · also called Marseille Germander, Hybrid Germander · flowering

Teucrium massiliense is a deciduous Mediterranean subshrub native to southern France and surrounding coastal regions, growing to around 1 m tall with grey-tomentose stems and small pink flowers that appear in summer and sometimes again in early autumn. It demands full sun and alkaline, sharply drained soil, rewarding neglect with drought tolerance rather than regular irrigation. After two to three years of establishment virtually no supplemental watering is needed. The plant is mildly toxic if ingested due to diterpene compounds present throughout the Teucrium genus.

Mature size: Typically 60 cm–1 m tall and 30–50 cm wide after several years.

Watch for — Winter waterlogging: Grey-leaved, tomentose Teucrium species are especially sensitive to wet roots in winter; raised beds or very gritty soils are strongly recommended in high-rainfall UK gardens.

How to tell marseille germander needs repotting

Repotting on a calendar is less reliable than reading the plant. For marseille germander, watch for these signs:

Roots spiralling thickly out of the drainage holes or pushing the whole plant up out of the pot.
The pot is so packed that water runs straight through in seconds and barely wets the soil.
It has split a plastic pot, or the rootball is a solid mass with almost no soil left when you slide it out.
Growth and (for marseille germander) flowering have clearly stalled despite good light and feeding — but remember this plant likes being snug, so a little crowding alone is not a reason to repot.

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 marseille germander

Only every 2–4 years, when genuinely crowded. Marseille Germander is one of the plants that genuinely prefers a snug pot — it grows and flowers better with its roots a little restricted, so resist the urge to repot it on schedule. Upright to bushy deciduous subshrub with grey-tomentose stems..

What size pot to step marseille germander up to

Go up only one pot size — roughly 2–3 cm (about an inch) wider in diameter, no more. Marseille Germander positively prefers a snug pot: it flowers and grows better when the roots are a little restricted. The single biggest repotting mistake here is over-potting — dropping marseille germander into a pot two or three sizes up. All that surplus soil holds water the small root system cannot use, stays cold and wet, and rots the roots within weeks. When in doubt, choose the smaller pot.

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 marseille germander

Early spring, just as new growth restarts, is the ideal window for marseille germander. The plant is moving into its strongest growth phase and re-roots into fresh soil quickly. Avoid repotting in winter dormancy or, for flowering plants, while it is in bud or bloom — recovery is slowest then and you risk dropping the flowers.

Step-by-step: repotting marseille germander

Confirm it actually needs it. Slide marseille germander out and check the roots. Only continue if it is genuinely packed — this plant prefers a snug pot, so if there is still soil and room, put it straight back.
Pick a pot only one size up. Choose a pot just 2–3 cm wider with good drainage. Resist anything bigger; over-potting is the main killer here.
Ease it out gently. Water lightly the day before, then tip marseille germander out, supporting the base. Tease the outer roots free only enough to stop them circling.
Repot at the same depth. Add a layer of fresh well-drained, calcareous to neutral loam or sand; alkaline to neutral ph, set the plant so the soil line sits exactly where it did before, and backfill around the sides, firming lightly.
Settle it in. Water once to settle the soil, then let it sit. Hold off on more water until the top of the soil dries — fresh soil around a small root system stays wet for a while.

Aftercare

Because the new soil holds more water than the old crammed rootball did, ease right back on watering — let the top of the soil dry before you water marseille germander again, or you will rot the roots in the very pot you just moved it to. Keep it out of harsh direct sun for a fortnight. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for marseille germander

Marseille Germander wants well-drained, calcareous to neutral loam or sand; alkaline to neutral ph. Good drainage is critical for grey-leaved species; amend with grit or sharp sand and avoid any site prone to winter waterlogging. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting marseille germander — frequently asked questions

How often should you repot marseille germander?

Only every 2–4 years, when genuinely crowded for marseille germander. Only repot marseille germander every 2–4 years, and only when it is genuinely root-bound — it flowers and grows best slightly crowded. Step up just one pot size in spring using well-drained, calcareous to neutral loam or sand; alkaline to neutral ph. The key mistake is over-potting: a too-big pot stays wet and rots the roots.

What size pot does marseille germander need?

When is the best time of year to repot marseille germander?

Does marseille germander like to be root-bound?

Yes — marseille germander genuinely flowers and grows best when slightly pot-bound, so do not rush to repot it. The mistake to avoid is over-potting into a much larger pot: the excess soil stays wet, the roots cannot use it, and the plant rots. Only repot every few years and only one snug size up.

Should you fertilise marseille germander after repotting?

Not immediately. Wait about 4 weeks after repotting marseille germander. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.