Repotting guide

When & how to repot Purple Heart (Tradescantia pallida 'Purpurea')

Also called Purple Queen, Setcreasea purpurea.

More about purple heart

About Purple Heart

Tradescantia pallida 'Purpurea' · also called Purple Queen, Setcreasea purpurea · houseplant

Purple Heart, Tradescantia pallida 'Purpurea', is a tough trailing perennial grown for its deep violet-purple, lance-shaped leaves and small pink flowers. Native to Mexico, it is heat- and drought-tolerant and intensely coloured in strong light. Easy and fast, it makes an excellent hanging plant indoors or a vivid groundcover in warm climates.

Mature size: Around 20-40 cm tall, with stems trailing or spreading 0.4-0.6 m.

Watch for — Leggy, sparse stems: From low light or age. Pinch tips hard and replant cuttings into the pot to thicken the plant.

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 — sprawling, trailing perennial with brittle, jointed purple stems that root wherever they touch soil; cascades from pots and spreads as a groundcover in frost-free areas. — sets the pace. Purple Heart, Tradescantia pallida 'Purpurea', is a tough trailing perennial grown for its deep violet-purple, lance-shaped leaves and small pink flowers. Native to Mexico, it is heat- and drought-tolerant and intensely coloured in strong light. Easy and fast, it makes an excellent hanging plant indoors or a vivid groundcover in warm climates.

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 well-draining general-purpose potting mix 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 well-draining general-purpose potting mix. An ordinary peat-free mix with added perlite or grit suits it well. It is unfussy but needs free drainage to keep the succulent stems from rotting. 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 well-draining general-purpose potting mix, 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.