A natural bonsai with succulent scaly brown barked stems and long flowering period makes Pelargonium cotyledonis particularily desireable. P. cotyledonis is the sole species of Pelargonium on the island of St. Helena. For me the growth period is spring though summer. I reduce watering from September to spring. Propagation is possible from cuttings.
Plants seem to be self sterile and even with different clones seed set has been poor.
Though not commonly available this Pelargonium should be on every pachycaul collectors want list. Pelargonium luridu m Pelargonium luridum is distributed in the summer rainfall grasslands of the Transvaal and north eastern cape. Winter day temperatures commonly drop well below zero. I'll report next year how rockery planted tubers survive the wet and cold Seattle winter. Though having only slightly succulent stems I've included P. tongaense here since I've found it to be a very nice indoor pot plant.