Every time I grow them they either dry up and turn brown or they just keep ending up shriveling up and losing their leaves.

Can anyone tell me how to water this. I think where I went wrong was with the watering.

For the soil, I suspect I need a good draining porous soil with a good amount of perlite and sand.

This time, I plan on having it indoors facing an eastern facing window.

BTW, what's the difference between S.radicans and S.rowleyanus?

I used to have trouble with them, too. Make sure you don't have mealy bugs or other pests, even hidden down amongst the roots. These two plants tend to lose some leaves that dry up on me, especially the radicans, but on the whole, they do well.

They have done better since I began giving them a little more water than I give my bigger, thick-leaved succulents, especially when trying to root them.

They certainly would like a well-draining soil, but don't use too much sand. Right now I am using a mixture of about 1/3 sharp sand, 1/3 pumice or else pea gravel, and 1/3 supersoil with some green-capped Osmocote granules thrown in.

Sometimes it's good to lay the long ends back on top of the soil, where they can make new roots. That way, you get a fuller pot before you begin to let the ends hang down.

I had copied a page of advice on the Hermann Englemann Greenhouses site about Senecio rowleyanus to my Scrapbook in FireFox, and now when I click on "Home" to find out an address to give you, I find the page unavailable, so here I have copied the advice part of it for you (Haven't got time right now to be searching for the site, and it may have disappeared from the Web, anyway.):

"Succulent senecios grow best where they receive about four hours of direct sunlight or 14 to 16 hours of strong artificial light daily in the growing season; however, they will grow well in bright indirect light. Reduce artificial light to 12 hours a day in winter. Night temperatures of 50° to 55° and day temperatures of 68° to 72° are ideal. For most succulent senecios, allow the top of the soil in their containers to become dry to the touch before watering thoroughly from spring through autumn. In winter, water the plants only enough to prevent them from shriveling.

Feed established plants monthly in spring and summer with a foliage-house-plant fertilizer such as 10-20-10, following the instructions given on the label. Repot when necessary in a mixture of equal parts of commercial potting soil and sharp sand. Propagate succulent senecios at any season by division or stem cuttings."

There is also a thread about the plant, whose URL I will post here. You can likely find more by searching on the forum for "string of pearls".