Contents
What is the terminal spike
In a healthy Phalaenopsis, new leaves emerge from the center of the rosette. A terminal spike appears when, at that central point, the plant forms a flower spike instead of a new leaf. After that, it can no longer produce leaves from the same growth point.
The terminal spike does not automatically mean the plant is lost. It is the end of central growth, not necessarily of the plant. Phalaenopsis can continue through a basal keiki or, more rarely, through other lateral growths.
This phenomenon occurs in monopodial orchids, such as Phalaenopsis. Unlike a Cattleya, which produces new growths from the base of pseudobulbs, Phalaenopsis normally grows from a single central tip.
Why it appears
Some specimens reach the terminal spike at maturity without having been cared for improperly. The predisposition may depend on the variety or hybrid. In other plants, a crown affected by rot, aggressive treatments, cold, burns, or impacts can stop central growth; subsequently, the plant may try to continue its cycle through basal growths.
Do not confuse a terminal spike with a regular spike that starts between leaves. The terminal spike emerges right from the center of the rosette, where the next leaf should have appeared.
What happens to the plant
The plant can bloom normally on the terminal spike. After flowering, the spike may dry out, and the Phalaenopsis remains with the existing leaves and roots. In the following months, it may generate one or more basal keikis, but this is not guaranteed and may take time.
The basal keiki eventually becomes the new growth point. Do not separate it immediately: while it is small, it remains connected to the mother plant and uses its resources. Separation makes sense only after the keiki has sufficiently developed its own roots.
Example of a Phalaenopsis with a terminal spike and basal keikis.
What to do after you notice it
Do not cut the spike just because it is terminal. Let the plant bloom if it has healthy roots and looks stable. The spike should be removed only after it dries out, using a clean tool.
Do not force the plant. Do not apply keiki paste on a weakened plant and do not start treatments without a clear reason. First, ensure proper light, correct watering, aerated substrate, and moderate fertilization. A plant with affected roots needs stabilization, not stimulation.
Check the roots and crown. If the phenomenon appeared after rot or injury, remove affected parts only if necessary and correct the cause. Repot only when the substrate is degraded or the roots have problems.
For light, watering, fertilization, substrate, and daily care, read the complete Phalaenopsis care guide.
A Phalaenopsis without a central point can continue through basal keikis and new roots.
Frequently Asked Questions
Is the plant lost?
Not necessarily. If it has firm leaves, functional roots, and no active rot, it can remain alive for a long time and may generate a basal keiki.
Will it definitely produce a keiki?
There is no guarantee. Some plants quickly generate a basal keiki, others need a long time, and some do not produce a visible one.
Can I still fertilize?
Yes, but moderately, only if the plant has active roots and is growing. Do not fertilize a dehydrated plant or one with affected roots.
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