Repotting guide

When & how to repot Tiny Sundew (Drosera parvula)

Also called Tiny sundew, Dwarf sundew.

More about tiny sundew

About Tiny Sundew

Drosera parvula · also called Tiny sundew, Dwarf sundew · houseplant

Drosera parvula is one of the smallest pygmy sundews, native to south-western Western Australia, where it occupies damp, sandy, nutrient-deficient soils in Mediterranean-climate heathland. Its rosettes are rarely more than 1 cm across and the entire plant fits on a fingernail, yet it is a full carnivore producing sticky mucilage-tipped tentacles to trap and digest insects. Like all pygmy Drosera it produces gemmae in autumn for vegetative propagation, and it follows a strict winter-growing, summer-dormant cycle — disrupting this rhythm is the primary cause of plant loss in cultivation. Drosera is not listed in the ASPCA database; treat as mildly-toxic for pets.

Mature size: Rosette typically under 1 cm in diameter — among the smallest of all sundews.

Watch for — Total loss during summer dormancy: The dormant stipule bud is easily rotted if the pot remains wet in warm weather; once the tiny leaves die back in spring move the pot away from the water tray, keep it warm and bone-dry until regrowth appears in autumn.

How to tell tiny sundew needs repotting

Repotting on a calendar is less reliable than reading the plant. For tiny sundew, 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 tiny sundew) 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 tiny sundew

Only every 2–4 years, when genuinely crowded. Tiny Sundew 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. Miniature pygmy rosette sundew; winter-active, summer-dormant; produces gemmae in early winter..

What size pot to step tiny sundew up to

Go up only one pot size — roughly 2–3 cm (about an inch) wider in diameter, no more. Tiny Sundew 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 tiny sundew 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 tiny sundew

Early spring, just as new growth restarts, is the ideal window for tiny sundew. 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 tiny sundew

Confirm it actually needs it. Slide tiny sundew 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 tiny sundew 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 40% peat, 60% perlite or coarse sand, 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 tiny sundew 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 tiny sundew

Tiny Sundew wants 40% peat, 60% perlite or coarse sand. A lean, fast-draining mix of peat and perlite (or washed sand) in a deep pot (at least 10 cm) gives the fine roots room to develop; the mix must be completely nutrient-free. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting tiny sundew — frequently asked questions

How often should you repot tiny sundew?

Only every 2–4 years, when genuinely crowded for tiny sundew. Only repot tiny sundew 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 40% peat, 60% perlite or coarse sand. The key mistake is over-potting: a too-big pot stays wet and rots the roots.

What size pot does tiny sundew need?

When is the best time of year to repot tiny sundew?

Does tiny sundew like to be root-bound?

Yes — tiny sundew 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 tiny sundew after repotting?

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