Long Lived Wallflowers

Wallflowers are usually considered biennials, planted in the Autumn to flower, and then be composted, the following year. Two years ago, instead of discarding all my wallflowers, I kept one, just pruning it as one would a rather leggy shrub. The following year it was much larger and flowered much more profusely that the plants put in the previous Autumn, so last Autumn I kept all my wallflowers, pruning them instead of discarding them. Having survived a distinctly cold spell in February they are now all thriving as little shrubs and are covered in buds.

There are some special variants of the wallflower that are sold as perrennials, but mine were ordindary garden centre generic wallflowers. It appears that all wallflowers are perennial.