Do you have details for the two UK nurseries?

Mark
N Ireland

I grew P. incrassatum in Tucson, Az in a raised bed in Arizona's sandy
clay. The bed was watered twice a week, on my irrigation system, all
year. The plant went dormant for the summer and didn't seem to mind the
water. It did beautifully for the four years I lived there. We were at a
3,000 foot elevation with intense sun. I brought it with me when I moved
to Florida and it is just beginning to show some growth after being dried
off this summer. After reading that wonderful introduction...I shall have
to grow more pelargoniums.

Here's what she says: "P. schlechteri. Two-tiered
Pelargonium. Leaf margins toothed, net veins strongly raised;
inflorescence usually 2 tiered, petals greenish yellow, each with purplish
red blotch." She doesn't show a geographic range for this species.
Incidentally, the book's full title is A Field Guide to the Wild Flowers of
KwaZulu Natal and the Eastern Region. It's a good reference for the area;
more than 1800 species are covered, not all geophytes, of course. (You may
need a magnifying glass to look at some of the photographs, though.) I
purchased my copy through Silverhill Seeds.