Nicole's two Cephalotus (terrarium, 4×100W CFL equiv, 12″ away) have fully formed but closed adult pitchers. Also, rooted Nepenthes cuttings (south kitchen window, winter vaporizer) aren't pitchering despite mother plants doing so.
Pitchers stay closed for weeks, then suddenly pop open—patience.
Light is likely the main factor; wait for longer days.
Can Nepenthes Be Propagated from Root Cuttings?
Cephalotus Soil Mix: Silica Sand Sources and Why Vermiculite Fails
Nepenthes tentaculata Color & Drosophyllum Humidity
Mold in Nepenthes Pitchers: Normal When Overloaded with Prey
Planting Depth for Nepenthes mirabilis Rooted Cutting
Do Cephalotus Flower Only Once? No—They Bloom Repeatedly With Proper Care
Nepenthes 'Miranda' Stops Pitchering Outdoors in Pennsylvania
Feeding Nepenthes Bloodworms and Nectar Production
Controlling Snails in Nepenthes: Transplant and Bait Strategies
Nepenthes, Seedling, and Darlingtonia Dormancy & Light Requirements
Optimizing Fluorescent Light Distance for Nepenthes sanguinea and N. 'Miranda': Close Is Better
How to Propagate Nepenthes: Cuttings, Air Layering, and Seeds
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