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Repotting guide

When & how to repot Wood Sage (Teucrium scorodonia)

Also called Wood Sage, Woodland Germander, Sage-leaved Germander.

More about wood sage

About Wood Sage

Teucrium scorodonia · also called Wood Sage, Woodland Germander · herb

Wood sage is a rhizomatous, clump-forming herbaceous perennial native to dry, acidic woodland, heathland, and rocky slopes throughout western and central Europe. Despite its common name, it is not a true sage (Salvia) but belongs to Lamiaceae and has distinctive garlic-scented foliage when crushed. It tolerates poor, acid, free-draining soils in partial shade and is exceptionally low-maintenance once established. As with other Teucrium species it contains potentially hepatotoxic diterpenoids and should be treated as mildly-toxic to pets as a precaution.

Mature size: 30–60 cm tall, spreading 30–50 cm.

Watch for — Root rot in heavy or wet soils: Stems turn black at the base and the plant dies back rapidly if planted in poorly drained or persistently wet soil; always plant in free-draining, lean conditions.

How to tell wood sage needs repotting

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

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 wood sage

Pot on seedlings as they grow; not a perennial repot. Wood Sageis grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Upright to spreading rhizomatous perennial forming loose clumps; spreads slowly by underground stems..

What size pot to step wood sage up to

Pot wood sage 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 wood sage

Pot wood sage 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 wood sage

  1. Pot on before it is root-bound. Check wood sage regularly; move it up as soon as roots reach the edge of the cell or pot, not after they have circled.
  2. 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.
  3. 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.
  4. Pot into rich mix. Set it into fresh free-draining, poor to moderately fertile, acidic to neutral sandy or rocky soil at the same depth (tomatoes are the exception — they can go deeper to root along the stem).
  5. Water in and grow on. Water well, keep it in good light, and resume feeding once it is established and growing again.

Aftercare

Water wood sage 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 wood sage

Wood Sage wants free-draining, poor to moderately fertile, acidic to neutral sandy or rocky soil. Thrives in lean, acidic soils typical of heathland and open woodland; avoid heavy, moisture-retaining soils or those with high lime content. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting wood sage — frequently asked questions

How often should you repot wood sage?

Pot on seedlings as they grow; not a perennial repot for wood sage. Wood Sage is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into free-draining, poor to moderately fertile, acidic to neutral sandy or rocky soil 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 wood sage need?

Pot wood sage 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. Use our pot size calculator to size it from the plant's current pot and root spread.

When is the best time of year to repot wood sage?

Pot wood sage 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.

Can you put wood sage straight into a much bigger pot?

No. Even a fast-growing wood sage 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 wood sage after repotting?

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

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