Can You Root a Cut Orchid Flower Spike? Almost Certainly Not

Short Answer: No

Cut flower spike in a bouquet? Highly unlikely to root. Unlike houseplant cuttings, orchid spikes need:

Without the plant, the spike lacks the signals to initiate growth. Enjoy the bouquet, but start a new plant from a proper division or keiki.

Orchids: Encouraging Blooms on a Mature Phalaenopsis Orchid; Mealybugs on Orchids: Identification, Treatment & Root Rot Prevention; Post-Keiki Removal: When Will My Orchid Bloom Again?; Orchid Keikis: What They Are, When to Remove & How to Pot Successfully; Dying Orchid with No Leaves: Crown Rot Likely Fatal; Phalaenopsis Dormancy Myth: They Don't Need a Rest Period; Rescuing a Sick Phalaenopsis: Repotting from Soggy Roots; Keiki on Browning Spike: Mother and Baby Survival Strategy; Phalaenopsis in Sphagnum Moss: Repot to Bark, Manage Green Spike; Phalaenopsis Keiki: Baby Plant on Flower Spike - What to Do

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