Repotting guide

When & how to repot Johnson's Pleurothallis (Pleurothallis johnsonii)

Also called Johnson's Pleurothallis, Johnson's Bonnet Orchid.

More about johnson's pleurothallis

About Johnson's Pleurothallis

Pleurothallis johnsonii · also called Johnson's Pleurothallis, Johnson's Bonnet Orchid · tropical

A medium-sized warm-to-intermediate growing orchid native to pine-oak forests of Mexico through Panama at 1,000–2,450 m. Also accepted as Acianthera johnsonii (Kew). Produces branched, creeping inflorescences bearing 5–7 small blooms with a distinctive pungent scent in summer and autumn. Best suited to intermediate household conditions.

Mature size: 20–35 cm tall including inflorescence; leaves 8–15 cm long

Watch for — Root rot: Warm growing conditions combined with poor drainage lead to root rot. Use a freely draining mix and pots with ample drainage holes. Inspect roots at repotting and trim any brown, mushy tissue with sterile scissors.

How to tell johnson's pleurothallis needs repotting

Repotting on a calendar is less reliable than reading the plant. For johnson's pleurothallis, watch for these signs:

Roots poking out of the drainage holes or coiling visibly around the inside of the pot.
You are watering far more often than you used to because the rootball dries out within a day or two.
Water runs straight through and out the bottom without soaking in.
Top growth has slowed or new johnson's pleurothallis leaves are noticeably smaller than older ones despite good light.

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 johnson's pleurothallis

Every 12–18 months — sooner if roots show fast. Johnson's Pleurothallis's growth habit — medium-sized, tufted, unifoliate epiphyte or lithophyte; terete ramicauls with 3–4 nodes bear a single elliptic-oblong apical leaf; creeping, branched inflorescences carry 5–7 flowers with a notable pungent odour — sets the pace. A medium-sized warm-to-intermediate growing orchid native to pine-oak forests of Mexico through Panama at 1,000–2,450 m. Also accepted as Acianthera johnsonii (Kew). Produces branched, creeping inflorescences bearing 5–7 small blooms with a distinctive pungent scent in summer and autumn. Best suited to intermediate household conditions.

What size pot to step johnson's pleurothallis up to

Step up one pot size — about 2–3 cm (an inch) wider. Johnson's Pleurothallis grows fast, so it will fill that space within a season, but jumping several sizes at once still backfires: the unused soil stays soggy and rots even a vigorous root system. One size at a time, every year or so, is the rhythm.

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 johnson's pleurothallis

Early spring, just as new growth restarts, is the ideal window for johnson's pleurothallis. 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 johnson's pleurothallis

Time it for spring. Repot johnson's pleurothallis in early spring as growth restarts so it re-roots quickly into the fresh soil.
Choose one size up. Pick a pot about 2–3 cm wider with drainage holes. One step only — a much bigger pot stays soggy and rots roots.
Ease the plant out. Water lightly the day before, then tip johnson's pleurothallis out and gently loosen any roots circling the bottom of the rootball.
Repot at the same depth. Put a layer of fresh fine bark and perlite orchid mix in the new pot, set the plant so its soil line is unchanged, and backfill, firming lightly.
Water and pause feeding. Water once to settle the soil. Hold off fertiliser for about a month — fresh mix already has nutrients and feeding now burns new roots.

Aftercare

Water johnson's pleurothallis once to settle the soil, then let the surface dry before watering again — fresh mix around the roots stays wetter than the old compacted ball, so the commonest post-repot mistake is overwatering. Keep it out of direct sun for a week or two while roots re-establish. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for johnson's pleurothallis

Johnson's Pleurothallis wants fine bark and perlite orchid mix. A moisture-retentive, free-draining mix of fine fir bark, perlite, and chopped sphagnum works well. Small pots or baskets help prevent medium saturation. Mounting on tree-fern with a sphagnum pad is also effective in humid growing rooms. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting johnson's pleurothallis — frequently asked questions

How often should you repot johnson's pleurothallis?

Every 12–18 months — sooner if roots show fast for johnson's pleurothallis. Repot johnson's pleurothallis roughly every 12–18 months, in early spring as growth restarts. It grows fast and circles its pot quickly, so step up one size (about 2–3 cm wider) into fresh fine bark and perlite orchid mix. Don't jump several sizes — that soggy excess soil is what rots vigorous roots.

What size pot does johnson's pleurothallis need?

When is the best time of year to repot johnson's pleurothallis?

Can you put johnson's pleurothallis straight into a much bigger pot?

No. Even a fast-growing johnson's pleurothallis should only go up one pot size at a time. A vastly oversized pot holds a reservoir of wet soil the roots cannot reach, which stays cold and soggy and rots the roots — the opposite of what you wanted.

Should you fertilise johnson's pleurothallis after repotting?

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