Repotting guide

When & how to repot Inch Plant (Tradescantia fluminensis)

Also called Inch plant, Small-leaf spiderwort, Wandering trad, Wandering Willie, River spiderwort, White-flowered spiderwort.

More about inch plant

About Inch Plant

Tradescantia fluminensis · also called Inch plant, Small-leaf spiderwort · houseplant

The inch plant (Tradescantia fluminensis) is a fast-growing trailing houseplant with small fleshy leaves, prized for cascading stems in pots and hanging baskets. Give it bright indirect light, water when the top half of the soil dries, and pinch to keep it bushy. The ASPCA lists it as toxic to cats, dogs and horses (dermatitis), so it is mildly toxic.

Mature size: About 6-9 in (15-23 cm) tall, spreading or trailing 9-24 in (23-60 cm) wide; trailing stems can reach 1-2 ft or longer indoors when left unpruned.

Watch for — Root rot (brown or black leaves): Whole leaves turning brown or black usually signals overwatering. Let the top half of the soil dry between waterings and ensure the pot drains freely.

How to tell inch plant needs repotting

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

Every 2–3 years, into bone-dry mix. Inch Plant's growth habit — fast-growing, spreading and trailing evergreen perennial with succulent, jointed stems and small oval leaves. looks best in hanging baskets or on shelves where stems can cascade; pinch growing tips regularly to keep it full rather than sparse and leggy. — sets the pace. The inch plant (Tradescantia fluminensis) is a fast-growing trailing houseplant with small fleshy leaves, prized for cascading stems in pots and hanging baskets. Give it bright indirect light, water when the top half of the soil dries, and pinch to keep it bushy. The ASPCA lists it as toxic to cats, dogs and horses (dermatitis), so it is mildly toxic.

What size pot to step inch plant up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Inch Plant 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 inch plant

Spring or summer, while inch plant 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 inch plant

Repot dry. Do not water inch plant 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 houseplant 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 inch plant 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 inch plant 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 inch plant

Inch Plant wants well-draining general houseplant potting mix. A standard peat- or coir-based potting mix amended with perlite for drainage works well. Use a pot with drainage holes; soggy, compacted soil quickly leads to root rot in this fast-growing trailer. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting inch plant — frequently asked questions

How often should you repot inch plant?

Every 2–3 years, into bone-dry mix for inch plant. Repot inch plant every 2–3 years into a snug pot of well-draining general houseplant 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 inch plant need?

When is the best time of year to repot inch plant?

Should you water inch plant after repotting?

No — not straight away. Repot inch plant 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 inch plant after repotting?

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