Hello,
Last year I grew some Canadian Goldenrod ( Solidago Canadensis ) in a
new perennial border I've made up, and it's OK, tall, bright yellow brushes
of tiny flowers, but on the downside they really need staking, the flowering
period is not all that long, they would not flower again even after I
deadheaded the flowers that had gone off, and the foliage isn't really
architectural.

I'm thinking of replacing them this year with Yarrow, which looks to
me as giving a similar visual effect, but a long flowering period than the
Goldenrod ( which goes on for about, what, four weeks in late August/early
september? ). I also understand the foliage is more interesting.

Does anyone out there have a personal preference between these two
plants/opinion? I'm on heavyish clay soil, and there's nearly full sunlight
available.

Andy.