tropaeolum
Jane McGary (Sat, 15 Mar 2014 10:54:31 PDT)

Tom Brown asked

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