Posted: 11/04/2013 at 16:39
I'd do for the plain green or, at a stretch, amber heuchera. In my experience, the purples and limes prefer it cooler than your agapanthus will want it. IMHO you'd preobably be better off with one of the small sun-loving hardy geraniums, or even the tough but lovely alchemilla mollis in with the agapanthus. Foliage would give a similar effect and both would flower well before the aga, lengthening your season. The geranium may even stay evergreen, given that you'll have to put the pot somewhere sheltered over winter for the aga anyway... I'd expect the heuchera to start to suffer after a season or two, so unless you want to move the plants into the garden and buy anew each year, they're really not quite right for a hot dry pot...Either of my suggestions would trail a little too, addressing Matty2's point. A different approach would be to plant the aga in a narrower pot, sinking it into the larger with soil around. This would have a double benefit of insulating the aga in the winter and allowing you to put annual bedding around it into the soil at the margin - you could cram it in as you would in a hanging basket without fear of it stealling nutrition/water etc from your aga. You could even tuck some little bulbs such as muscari in deep down in there too (under the bedding) for some spring colour, without the usua worry of it legging it off around the garden ... Just a thought. I've used this approach with smaller clematis to cool their feet and hide their ankles with great success. But if you're set on heuchera, some of the greens with red flowers are real toughies. Bx