As the likes of Joanna Lumley drift among their eponymous fuchsias, we look at the sky and pray for the good weather to last so that we, too, can make the most of our gardens.The RHS Chelsea Flower Show's annual celebration of floral fancies has been exceptionally eco-friendly this year. In honour of its resilient homage to horticultural elegance, we've rooted out 5 of the best garden-related gadgets to add style to whatever tiny patch of grass you find ...