Pruning orchids: spikes, leaves and roots

When should you prune an orchid?

After flowering, once the last flower falls. This is the only timed task: the RHS cuts spikes when all flowers have fallen¹. Other work follows the plant's condition throughout the year:

• cut dry, brown or yellowed spikes at the base once dry²;
• remove fading leaves as they begin to fade¹;
• cut dead roots at repotting, possible in any season while roots are active with green tips¹.

Moth orchids (Phalaenopsis) have no branches to thin or shape. Pruning means removing spent parts, leaving aerial roots untouched².

Pour qu'une nouvelle hampe parte après la coupe, la plante a besoin de quelques semaines de journées plus fraîches : encouraging an orchid to flower again explique le déclencheur.

Where to cut spikes after flowering

Three choices, depending on the plant and your aim. Spikes have nodesA small stem swelling beneath a brown triangular scale, containing a dormant bud that can produce a flowering branch, leaf or keiki., small swellings below flowers. Used nodes have scales lifted away from the stem; usable nodes have scales flat against it³.

Where to cut	Expected result	Source
Just above the second node below faded flowers, about 1 cm (0.4 in) above it	A secondary flowering branch in 8–12 weeks according to the AOS	RHS1, Maryland2, AOS4
At leaf level	Stronger flowering with larger flowers in under a year	AOS4
Nowhere: leave the spike whole	A green spike may continue growing and flower again	Muséum5

Repeat flowering has a cost. The American Orchid Society warns it may tire the plant, often producing smaller, weaker flowers; it recommends this only for vigorous plants and often prefers allowing recovery³.

If no usable nodes remain, cut as low as possible. Otherwise cut above the second node but below any dry or brown section³. One exception: novelty hybrids with star-shaped flowers and short spikes flower again from the same stem tip; do not cut while green³.

Faded leaves and dry spikes: cut at the base

Cut old yellowed leaves and dry spikes at the plant's base². The RHS removes old leaves as soon as they start fading¹.

A soft blackish leaf releasing water when pressed is different: rot needs prompt removal. On moth orchids, the AOS removes affected tissue or the entire leaf before rot reaches the crownThe moth orchid’s growing point at the center of the rosette, where new leaves emerge., with a small margin of healthy tissue, then dusts the wound with cinnamon⁶.

Avant de couper, distinguez la vieille feuille qui s'en va d'un signal d'alarme : yellow orchid leaves se lisent selon leur place et leur texture.

Taches détrempées, pourriture noire, insectes : orchid diseases se reconnaissent symptôme par symptôme.

Dead roots and aerial roots

Cut dead roots at repotting; never cut aerial roots. The RHS removes brown, shriveled, soft or hollow roots, then shortens healthy roots to about 12 cm (4.7 in); healthy roots are full, firm and silvery white¹. The Muséum likewise removes dried roots when renewing substrate⁵.

Aerial rootsRoots extending outside the pot into air; in epiphytic moth orchids, they absorb water and contribute to photosynthesis. extending beyond pots are normal: University of Maryland Extension insists they should not be cut². The RHS advises against burying them because they would rot beneath substrate¹.

Tri des racines, écorce neuve et pot à la bonne taille : repotting an orchid se fait quand de nouvelles racines pointent.

Disinfect blades between plants

A clean blade for each plant: cuts transmit viruses. Hands and tools are the main transmission route, and no treatment cures a virus-infected orchid⁷. The American Orchid Society disinfects tools between plants by one of these methods⁷:

1. Five minutes in a 10% commercial bleach solution.
2. A few seconds in flame, after alcohol treatment.
3. One hour at 132 °C (270 °F) in an oven.
4. A new razor blade per plant, discarded afterwards.

Stephen Batchelor's AOS bulletin calls for a clean cut: a neat wound dusted with fungicide resists infection better than a ragged one⁸. Powdered cinnamon acts as fungicide on small wounds⁶.

A keiki on the spike: wait for roots

If a spike node produces a keikiA plantlet on an orchid spike or base, with its own leaves and roots; Hawaiian for “baby”., do not cut the stem. The plantlet feeds from its parent until it has several good roots¹. Batchelor separates it at 2.5–5 cm (1–2 in) root length, with sterilized pruning shears⁸.

Détacher le keiki, le rempoter, ou en provoquer un : propagating an orchid détaille ce qui marche et ce qui ne marche pas.

Add your orchid: Floralens reminds you when to cut spikes and repot, according to flowering in Pro mode. Get reminders

Frequently asked questions

Where should I cut an orchid stem after flowering?

Just above the second node below faded flowers, about 1 cm (0.4 in) above it², but below any dry stem section³. If the spike pales and dries, cut at the base¹.

How do I cut an orchid so it grows again?

Leave two nodes on the spike: one generally flowers within 8–12 weeks. For stronger flowering the following year, instead cut at leaf level⁴.

How do I prune an orchid with no flowers left?

Look at the spike: if green, cut above the second node or leave it whole, since it may flower again⁵; if dry, cut at the base². Other plant parts need no pruning except faded leaves¹.

Where should I cut an orchid branch?

Treat secondary branches like the main spike: above a usable node, below dry tissue, with a disinfected blade³. Novelty hybrids with branched spikes flower again from tips: leave branches while green³.

When and how should I prune an orchid?

After flowering, once all flowers fall, use a clean blade above the second node below faded flowers¹. Disinfect tools between plants using flame or diluted bleach⁷.

What should I do after my orchid finishes flowering?

Cut the spike, or leave it if green⁵. Repot if bark breaks down or the plant outgrows its pot: Maryland Extension does this as new growth starts, rather than necessarily just after flowering².