Growing Yam/Oca, also Oka

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20 Feb 19 Carl-Philip (New Zealand - cool/mountain climate)
My yams have taken off. Growing about 6 feet now from the garden. Do I cut the vines back? . Like kumara.
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24 Feb 19 Mike (New Zealand - sub-tropical climate)
Sounds like too much fertiliser - nitrogen - to have a massive leaf crop. Cut them back to half.
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