Some plants have never made it onto my radar despite their total suitability for my garden. Centaureas, for example. For me, the cornflower or Knapweed has either been a lovely, but desperately tall annual (I am never going to stake an annual!), or a dull and very weedy knapweed. Finally, some bored browsing where I came across a national collection and the scales have fallen from my eyes. Fortune intervened the very next day when a friend of mine offered me a C.pulcherrimma, now sitting in my gravel garden in all its lilac loveliness. This part of the allotment is finally getting a sorting out so all the remaining duffers (hemerocallis,) or maniacs (those eryngiums and acanthus) are being rehomed or composted. I predict a looming craze. As a novice to knapweeds, do tell all.