Blue flowers can be particularly prized in summer, where their cool nature contrasts with summer heat (if we are lucky).

In the world of colour, the combination of blue, yellow and red creates a natural three-part harmony, and it is these colours that we associate with the autumn garden. While red, yellow and orange ...

According to the Royal Horticultural Society (RHS), if you have acidic soil (with a pH of 5.5 or lower) then this should produce rich blue flowers due to the availability of aluminium, whereas ...