"p.k." wrote in message
...
Trevor wrote:
Can anyone point me in the direction of information on planting up an
herbaceous border? a.g. No plants per square metre? Its 20m x 1m
approx. Also any good websites on Herbaceous Border design??

As a simple rule of thumb use :

large perennials 60cm
medium 45cm
small 30cm

pk

I'd thought large 3 per sq m med 5 / sq m small 7/sq m - hows that sound??