Potentilla is in flower at the moment, making a great display of colour and it will go on flowering for months. Even though it is colourful, it is not one of the star plants of the garden in the way ...

In recent years we have all been encouraged to introduce more and more brightly coloured, "muscular" plants into our gardens. These big, bold plantings are seductive in their way, but unassuming ...

Ultraviolet photos of pressed flower specimens from the Munich Herbarium show pigment changes in the potentilla flower. The lighter areas are UV reflective and lack UV-absorbing compounds.

Gardeners love colour. Especially Canadian gardeners who, lets face it, are starved for visual excitement after our long white — and often grey — winter. So, when out shopping for flowering shrubs to ...