By Steveg1966
West Yorkshire,
United Kingdom 
Papalisa ulluco (Ullucus tuberosus) has Anybody grown these before looks good I am thinking of buying some tubers so any info would be great,
2 Mar, 2014
The main considerations are length of season and summer heat. You need to get them to mid-November without frost and they will suffer in prolonged periods of temperatures above 80F/27C. Many are seriously infected with viruses, so if you can't find a good commercial source, try to verify that the person supplying them to you is able to get reasonable yields. Low yields of small tubers may be an indication that the tubers are infected.
More growing info:
http://www.cultivariable.com/?page_id=165
9 Mar, 2014