These stars have been especially good value.
Corydalis, originally brought (legally) from Darwin's garden at Down House.
It has flowered all year, seeds itself around in a friendly but not thuggish manner.
County rose, Hampshire. In flower most of the year, even on Christmas day. Has grown in deep shape as well as sun (now the leylandii hedge has been removed).
Leysesteria formosa - shrubs, hedges, birds love the berries, seeds around easily even in terrible soil.
Modern rose, has flowered most of the year.
Phygelius, cape fuchsia. In the right spot (allowing roots to run in poor stony soil) it will fill a barren patch. To stop it becoming an enormous plant, plant it in its pot with the bottom removed - then it won't spread sideways.
Pineapple lily (Eucomis).
This one has set itself in a rough crazy paving and endured minus 20 degrees.