Posted: 19/02/2013 at 18:00
I've got some in large pots, under planted with small bulbs. The rest are in the ground.
IME they do better in slightly richer soil conditions- not too dry, nor too shaded. Although I have VW in the garden, they seem to leave them alone in most circumstances.
Every Feb I remove all the old, tatty leaves. Later on in the Spring, if they've become 'woody' & lifted out of the soil/compost, I replant the youngest 'stems' deeper. Advice from an exhibitor at a RHS show. You can do it in the Autumn, but the risk I find then, is them starting to rot off over the winter. I keep the older stems for cuttings-
If you look closely at the stem you can see the 'nodes' from where new growth will start. so you can chop an old stem into sections, making sure there are 'nodes' on each section. Keep it the correct way up, & replant them level with the compost in pots & a top dressing of grit. Keep out of direct sun- coldframe, side of wall etc- & you'll soon have new plants to use. J.