In agriculture there is always a 'right time' to do things, but even with hindsight it would be hard to define the best time to lift the Oca this year. Getting a balance between delaying harvest to maximise tuber development, versus lifting early to avoid damage from frost is a difficult call at the best of times, but this year it was always going to be wrong; with a very early first-frost in October, and a record-breaking cold spell in December, this was not an 'Oca-year'.
The top growth has been dead for several weeks now, but harvest has been delayed either by snow cover, sub-zero temperatures, heavy rain, or pessimism-induced lethargy. However, the snow cover has been the saviour of the crop...
Tubers are generally small, and yield is well below that of previous years, but a few plants have produced a reasonable crop, while a couple have failed to make any tubers at all.
So a bad year, but mustn't grumble.