Repotting guide

When & how to repot Purple Heart (Tradescantia pallida)

Also called Purple Heart, Purple Queen, Purple Secretia, Setcreasea, Purple Spiderwort, Purple Wandering Jew.

More about purple heart

About Purple Heart

Tradescantia pallida · also called Purple Heart, Purple Queen · houseplant

Purple Heart (Tradescantia pallida) is a fast-growing trailing houseplant prized for vivid violet-purple foliage. Give it the brightest light you can for deepest colour, let the top inch of soil dry between waterings, and pinch to keep it bushy. The ASPCA classes the Tradescantia genus as toxic, so keep it away from pets.

Mature size: Around 30 cm (1 ft) tall and spreading 30-60 cm (1-2 ft) wide; trailing stems can grow considerably longer in a hanging basket.

Watch for — Faded, greenish colour: Too little light. Move to a brighter spot with some direct or strong indirect sun to restore the deep purple pigment.

How to tell purple heart needs repotting

Repotting on a calendar is less reliable than reading the plant. For purple heart, 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 purple heart

Every 2–3 years, into bone-dry mix. Purple Heart's growth habit — fast-growing, trailing/cascading and spreading herbaceous perennial with succulent, jointed stems. excellent in hanging baskets or as a cascading accent; pinch stem tips above a leaf node to encourage bushy, compact growth. — sets the pace. Purple Heart (Tradescantia pallida) is a fast-growing trailing houseplant prized for vivid violet-purple foliage. Give it the brightest light you can for deepest colour, let the top inch of soil dry between waterings, and pinch to keep it bushy. The ASPCA classes the Tradescantia genus as toxic, so keep it away from pets.

What size pot to step purple heart up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Purple Heart 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 purple heart

Spring or summer, while purple heart 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 purple heart

Repot dry. Do not water purple heart 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 light, well-draining potting mix rich in organic matter 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 purple heart 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 purple heart 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 purple heart

Purple Heart wants light, well-draining potting mix rich in organic matter. Adaptable to clay, loam or sandy soils and to acidic, neutral or alkaline pH (per NC State Extension). For containers, a peat- or coir-based mix amended with perlite gives the drainage it needs. 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 heart — frequently asked questions

How often should you repot purple heart?

Every 2–3 years, into bone-dry mix for purple heart. Repot purple heart every 2–3 years into a snug pot of light, well-draining potting mix rich in organic matter, 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 purple heart need?

When is the best time of year to repot purple heart?

Should you water purple heart after repotting?

No — not straight away. Repot purple heart 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 purple heart after repotting?

Not immediately. Wait about 3 weeks after repotting purple heart. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.