Tom Brown asked >I have tubers of..T.brachyceras, ciliatum, polyphylum, tuberosum (Ken >Aslet) & piliphera . I would be grateful for any advice regards their >planting....soil conditions; location; watering; etc.? Would planting in >pots be recommended/OK and if so what sizes? T. brachyceras (now available commercially) is a small species that can be grown successfully in a 10-inch/25 cm diameter, deep pot, though it does better given more space. I don't know piliferum (I think that must be the right spelling, not piliphera; also polyphyllum, not polyphylum). The others are large-growing plants that would do better in a gritty soil in a deep raised bed, covered against excessive wet. I did not find T. tuberosum 'Ken Aslet' hardy in western Oregon, but no doubt winters are warmer in Wales where Tom lives. Other than piliferum, I can recommend dry summer conditions for all mentioned. Jane McGary Portland, Oregon, USA