Scleranthus biflorus and Isotoma fluvatilis

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Hi

I am interested in attempting to grow these two plants as a groundcover/base. I would have to propogate from seed as I have never seen them in a SA nursery.

Has anyone had experience with these (Moira down under perhaps?). How difficult are they to grow from seed and what are their moisture requirements in summer?  I am in Cape Town on the coast with acid sand and strong hot salty winds in summer. We have winter rainfall - if wet winter conditions are a factor would the sharp drainage offset this?

I got  the info below of a web site.

Richard (I think it was) from Valhalla Nurseries - if you see this post please advise on the availability of seed or plants in SA.

Regrds

Charl

"For best results, provide a moist but well-drained, sandy soil in full sun. Plants will prove reliably hardy if wet winter conditions are avoided".

"Growth is relatively slow; however, well established plants may be easily divided and the divisions successfully replanted. New plants may also be produced in time from seed. When this plant is being sited in the garden, a position in full sun with adequate moisture will ensure the optimum growth conditions. Soil types do not appear to be critical"