Whether to cut a spent flower spike depends on genus. Some stay green and rebloom (e.g., Phalaenopsis); others brown and should be removed at the base. Watch the spike: if it browns, cut it off.
Read the spike, not the calendar: green stays, brown goes.
No New Spikes on Phalaenopsis: Light & Fertilizer Fixes
Why Are My Miltonia Flower Spikes So Short?
Phalaenopsis Spike Genetics: Brown vs. Green After Bloom
Why Miltoniopsis Flower Spikes Grow Zigzag & Break
Inducing Rebloom in Phalaenopsis or Dendrobium: Light, Fertilizer, and Temperature
Planting Flowering Dogwoods in Poorly Drained Soil
Managing Excessive Flowering in Drosera spatulata Under Long Photoperiods
Drosera regia Flowering: Cut or Keep? Depends on Light
Late-Season Flowering in Sarracenia flava
Drosera spatulata Flowering: To Cut or Not, and How to Harvest Seeds
Venus Flytrap Flowering: Self-Pollination and Seed Collection
Unidentified Flowering Plant: Need Photo for ID and Care
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