Repotting guide

When & how to repot Microsorum pteropus 'Windelov' (Microsorum pteropus 'Windelov')

Also called Windelov Java fern, lace Java fern.

More about microsorum pteropus 'windelov'

About Microsorum pteropus 'Windelov'

Microsorum pteropus 'Windelov' · also called Windelov Java fern, lace Java fern · tropical

Microsorum pteropus 'Windelov' is a lace-leaf Java fern cultivar whose frond tips split into fine, frilly fingers, giving a delicate crested look. Like the standard Java fern it is an epiphyte grown on wood or rock, thrives in low light, and is exceptionally hardy. It spreads via frond plantlets into ornate, finely-tipped green clusters.

Mature size: Fronds typically 15-25 cm tall, a little more compact than the standard Java fern; the rhizome spreads slowly across wood or rock.

Watch for — Java fern melt: Translucent, mushy fronds after stress or a move. Stabilise water quality, dose potassium, remove affected fronds, and the rhizome pushes healthy new lace growth.

How to tell microsorum pteropus 'windelov' needs repotting

Repotting on a calendar is less reliable than reading the plant. For microsorum pteropus 'windelov', 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 microsorum pteropus 'windelov'.

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 microsorum pteropus 'windelov'

Every 1–2 years, disturbing the roots as little as possible. Microsorum pteropus 'Windelov''s growth habit — epiphytic, slow-growing creeping rhizome producing upright fronds whose tips fan into fine, frilly crests, forming ornate spreading clusters on hardscape. — sets the pace. Microsorum pteropus 'Windelov' is a lace-leaf Java fern cultivar whose frond tips split into fine, frilly fingers, giving a delicate crested look. Like the standard Java fern it is an epiphyte grown on wood or rock, thrives in low light, and is exceptionally hardy. It spreads via frond plantlets into ornate, finely-tipped green clusters.

What size pot to step microsorum pteropus 'windelov' up to

Go up only one size and handle the rootball as little as possible. Microsorum pteropus 'Windelov' 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 microsorum pteropus 'windelov'

Early spring, just as new growth restarts, is the ideal window for microsorum pteropus 'windelov'. 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 microsorum pteropus 'windelov'

Keep disturbance to a minimum. Microsorum pteropus 'Windelov' 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 none; epiphyte attached to wood or rock ready.
Slide the rootball out whole. Water the day before, then ease microsorum pteropus 'windelov' 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 microsorum pteropus 'windelov' 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 microsorum pteropus 'windelov'

Microsorum pteropus 'Windelov' wants none; epiphyte attached to wood or rock. Never bury the rhizome, it will rot. Tie or glue the rhizome to driftwood or stone and let the roots grip the surface while it feeds from the water column. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting microsorum pteropus 'windelov' — frequently asked questions

How often should you repot microsorum pteropus 'windelov'?

Every 1–2 years, disturbing the roots as little as possible for microsorum pteropus 'windelov'. Repot microsorum pteropus 'windelov' 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 none; epiphyte attached to wood or rock, keep it warm and humid afterwards, and never bare-root or hard-prune the roots.

What size pot does microsorum pteropus 'windelov' need?

When is the best time of year to repot microsorum pteropus 'windelov'?

Why does microsorum pteropus 'windelov' sulk after repotting?

Microsorum pteropus 'Windelov' 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 microsorum pteropus 'windelov' after repotting?

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