Mature size & growth rate

How big does Hedge Woundwort (Stachys sylvatica) get?

Also called Hedge Woundwort, Whitespot.

More about hedge woundwort

About Hedge Woundwort

Stachys sylvatica · also called Hedge Woundwort, Whitespot · flowering

Hedge woundwort is a robust herbaceous perennial native to woodland edges, hedgerows, and shaded banks across Europe and western Asia. It thrives in moist, humus-rich soils in dappled to full shade, making it ideal for naturalising under trees or in wild gardens. The most important care fact is that it spreads readily by rhizomes and self-seeding, so containment is needed in formal beds. It is not listed on the ASPCA toxic plant database, but crushed foliage produces a strongly unpleasant odour that typically deters pets from ingesting it; classify as mildly-toxic out of caution.

Mature size: 60–100 cm tall, spreading 60 cm or more over time.

Indoor size vs how big it gets in the wild

Hedge Woundwort stays fairly low but widens over time — it spreads into a bigger clump by offsets, runners or rhizomes rather than shooting upward. Indoors and in a pot, expect 60–100 cm tall, spreading 60 cm or more over time.. A pot, your light levels and a little pruning are what set the final size in a home, far more than the plant's theoretical potential.

Size here is about width, not height: the plant builds an ever-wider clump or sends out plantlets and runners while staying relatively short.

Growth rate and years to mature

Hedge Woundwort is a moderate grower. Realistically, expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Its feeding profile backs this up: feed with a balanced general fertiliser in spring only if growth is poor; on fertile woodland soils no feeding is required.

Want this turned into the right next pot at the right moment? The pot size calculator and the hedge woundwort repotting guide cover when and how much to size up — pot size is one of the biggest levers on how fast hedge woundwort grows.

How to keep hedge woundwort smaller

You are not stuck with the maximum size. For hedge woundwort specifically, these are the levers, in order of impact:

Divide the clump every year or two — splitting hedge woundwort is the main way to control its spread and refresh it.
Remove runners, plantlets or offsets as they appear if you want it to stay a single tight clump.
Keep it slightly pot-bound; a snug pot naturally limits how wide the clump can get.

The keep-it-smaller method, step by step

Lift the whole plant. Slide hedge woundwort out of its pot in spring when the clump has filled it.
Split the clump. Tease or cut the rootball into two or more sections, each with healthy roots and growth.
Repot one division. Put a single division back in the original pot to reset it to a smaller size; pot or give away the rest.
Remove offsets as they form. Through the year, detach new runners or pups to stop it spreading again.

How to grow hedge woundwort bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for hedge woundwort the accelerators are:

Give it a wider pot and let the clump fill it — width is exactly how this plant gets bigger.
Brighter light speeds up clump and offset production noticeably.
Leave plantlets and offsets attached and feed through the growing season for the fastest spread.

Light is almost always the ceiling. The hedge woundwort light requirements page covers exactly how bright a spot it needs to grow at its potential instead of stalling.

When hedge woundwort outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for hedge woundwort:

The clump bulging over the pot rim or splitting the pot — the cue to divide, not to find a bigger room.
A dense centre that goes bare or tired while the edges keep spreading.
Runners or offsets escaping across the shelf or into neighbouring pots.

If it is the pot rather than the room, it is a repotting job, not a goodbye — see the hedge woundwort repotting guide. If you want more of this plant instead of a bigger one, the hedge woundwort propagation guide turns prunings into new plants.

Hedge Woundwort size — frequently asked questions

How big does hedge woundwort get?

Hedge Woundwort reaches 60–100 cm tall, spreading 60 cm or more over time. when grown indoors. Size here is about width, not height: the plant builds an ever-wider clump or sends out plantlets and runners while staying relatively short.

Is hedge woundwort slow or fast growing?

Hedge Woundwort is a moderate grower. Expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Hedge Woundwort stays fairly low but widens over time — it spreads into a bigger clump by offsets, runners or rhizomes rather than shooting upward.

How long does hedge woundwort take to reach full size?

Roughly three to six years to reach mature indoor size, gaining a steady amount each growing season. Light, pot size and feeding move that timeline more than anything else.

How do I keep hedge woundwort smaller?

Divide the clump every year or two — splitting hedge woundwort is the main way to control its spread and refresh it. Remove runners, plantlets or offsets as they appear if you want it to stay a single tight clump. Keep it slightly pot-bound; a snug pot naturally limits how wide the clump can get.

How can I make hedge woundwort grow bigger or faster?

Give it a wider pot and let the clump fill it — width is exactly how this plant gets bigger. Brighter light speeds up clump and offset production noticeably. Leave plantlets and offsets attached and feed through the growing season for the fastest spread.