Repotting guide

When & how to repot Table Fern (Pteris vittata)

Also called Table Fern, Ladder Brake Fern, Arsenic Fern.

More about table fern

About Table Fern

Pteris vittata · also called Table Fern, Ladder Brake Fern · houseplant

Pteris vittata is a fast, finely cut brake fern with ladder-like fronds of narrow pinnae on wiry stems. It is famous as a hyperaccumulator that pulls arsenic from soil. Indoors it makes an easy, airy tabletop fern, tolerating more light and slightly drier spells than most ferns while still wanting steady moisture and humidity.

Mature size: Fronds typically 30-60 cm long; clumps reach 30-50 cm tall and wide indoors.

Watch for — Yellowing, limp fronds: Overwatering or poor drainage causing root rot. Let the surface dry slightly and check the pot drains freely.

How to tell table fern needs repotting

Repotting on a calendar is less reliable than reading the plant. For table fern, watch for these signs:

Roots creeping out of the drainage holes or matting tightly across the soil surface.
The rootball dries out within a day or two no matter how much you water.
Water channels straight down the gap between rootball and pot without wetting the centre.
Steady decline — thin growth, persistent crispy edges — that good humidity and watering have not fixed. Only then is the disturbance of a repot worth the risk for table fern.

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 table fern

Every 1–2 years, disturbing the roots as little as possible. Table Fern's growth habit — clump-forming terrestrial fern with arching, once-pinnate fronds rising from a short rhizome; spreads readily by spores. — sets the pace. Pteris vittata is a fast, finely cut brake fern with ladder-like fronds of narrow pinnae on wiry stems. It is famous as a hyperaccumulator that pulls arsenic from soil. Indoors it makes an easy, airy tabletop fern, tolerating more light and slightly drier spells than most ferns while still wanting steady moisture and humidity.

What size pot to step table fern up to

Go up only one size and handle the rootball as little as possible. Table Fern resents root disturbance, so the goal is to slide the intact rootball into slightly more soil — not to tease, wash or prune the roots. A modest step up means less shock and a faster recovery.

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 table fern

Early spring, just as new growth restarts, is the ideal window for table fern. 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 table fern

Keep disturbance to a minimum. Table Fern resents root disturbance, so the plan is to move the intact rootball — not to wash, tease or prune the roots.
Choose just one size up. Pick a pot only one size larger with drainage, and have moisture-retentive loose, humus-rich, free-draining mix ready.
Slide the rootball out whole. Water the day before, then ease table fern out keeping the rootball intact. Gently free only the roots that are circling the very bottom.
Nestle it into fresh soil. Add a base layer of fresh mix, set the rootball in at the same depth, and backfill gently around the sides without packing hard.
Water and protect. Water in, then keep it warm, humid and out of direct sun for a few weeks while it re-roots. Expect a short sulk — that is normal.

Aftercare

Expect table fern to sulk for a couple of weeks — that is normal after any root disturbance for this group. Keep it warm, humid and out of direct sun, water just enough to keep the mix lightly moist, and do not panic and overwater while it re-roots. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for table fern

Table Fern wants loose, humus-rich, free-draining mix. Peat-free or coir-based potting mix lightened with perlite and a little fine bark. Slightly acidic to neutral. Good drainage is essential to prevent root and 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 table fern — frequently asked questions

How often should you repot table fern?

Every 1–2 years, disturbing the roots as little as possible for table fern. Repot table fern every 1–2 years, disturbing the roots as little as possible — it sulks for weeks if the rootball is teased apart. Slide it into one size up in spring with fresh loose, humus-rich, free-draining mix, keep it warm and humid afterwards, and never bare-root or hard-prune the roots.

What size pot does table fern need?

When is the best time of year to repot table fern?

Why does table fern sulk after repotting?

Table Fern resents root disturbance, so a wilt or stall for a week or two after repotting is normal, not a failure. Minimise it by keeping the rootball intact, stepping up just one size, and keeping the plant warm, humid and out of direct sun while it re-roots.

Should you fertilise table fern after repotting?

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