Repotting guide

When & how to repot Purple Dragon Dead Nettle (Lamium maculatum 'Purple Dragon')

Also called Purple Dragon Dead Nettle, Purple Dragon Spotted Dead Nettle.

More about purple dragon dead nettle

About Purple Dragon Dead Nettle

Lamium maculatum 'Purple Dragon' · also called Purple Dragon Dead Nettle, Purple Dragon Spotted Dead Nettle · flowering

An eye-catching cultivar with predominantly silver leaves bearing a wide green margin and exceptionally large, deep magenta-purple flowers — notably bigger than those of most other Lamium maculatum selections. Fast-growing and effective as ground cover under trees or in shaded borders. Hardy to USDA zone 3.

Mature size: 15–20 cm tall (6–8 in); spreads 45–60 cm (18–24 in) wide

Watch for — Powdery mildew: Common in densely planted areas with poor air circulation, especially when soil dries at the roots. Thin clumps and maintain even soil moisture. Remove and dispose of affected leaves.

How to tell purple dragon dead nettle needs repotting

Repotting on a calendar is less reliable than reading the plant. For purple dragon dead nettle, 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 purple dragon dead nettle) 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 purple dragon dead nettle

Only every 2–4 years, when genuinely crowded. Purple Dragon Dead Nettle 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. Fast-growing, prostrate, mat-forming semi-evergreen perennial; spreads rapidly by stolons.

What size pot to step purple dragon dead nettle up to

Go up only one pot size — roughly 2–3 cm (about an inch) wider in diameter, no more. Purple Dragon Dead Nettle 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 purple dragon dead nettle 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 purple dragon dead nettle

Early spring, just as new growth restarts, is the ideal window for purple dragon dead nettle. 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 purple dragon dead nettle

Confirm it actually needs it. Slide purple dragon dead nettle 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 purple dragon dead nettle 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 average to humus-rich, well-drained soil, 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 purple dragon dead nettle 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 purple dragon dead nettle

Purple Dragon Dead Nettle wants average to humus-rich, well-drained soil. Adaptable to loam, clay-loam, or amended sandy soils. Target pH 6.0–7.0. Add compost to improve moisture retention in light soils. Drainage is essential in winter to prevent crown rot. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting purple dragon dead nettle — frequently asked questions

How often should you repot purple dragon dead nettle?

Only every 2–4 years, when genuinely crowded for purple dragon dead nettle. Only repot purple dragon dead nettle 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 average to humus-rich, well-drained soil. The key mistake is over-potting: a too-big pot stays wet and rots the roots.

What size pot does purple dragon dead nettle need?

When is the best time of year to repot purple dragon dead nettle?

Does purple dragon dead nettle like to be root-bound?

Yes — purple dragon dead nettle 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 purple dragon dead nettle after repotting?

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