Paph. charlesworthii not blooming

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bulolo

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I've been growing this plant for several years, but it just keeps growing new growths but not blooming while another charlesworthii has bloomed twice for me now but is half the size.
Any suggestions as to how to get it to bloom? Perhaps this fall I should chill it?
 

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tnyr5

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They require two chilling cycles to bring them out of complacency. The first winter chill sets the clock, the second one next year pushes the spikes. After that, they will bloom every year, unless you stop chilling them. For stubborn clones, take them all the way down to the 40's in winter. Throw them in the fridge at night in winter, if all else fails lol.
 

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