This summer, expect stunning colour in the order beds, herbaceous borders and Duke's Garden, and gape at the Colour Spectrum, a 60m long plantscape with sinuous ribbons of red, blue and yellow flowers, interleaved with plantings of fresh green, warm red, vibrant orange and calm blue. Some of these plants, such as scabious and coreopsis, will feature in the hands-on natural dyes workshops on Sundays 21 and 28 July, 2.30pm to 4.30pm; the dyed fabrics will make you long to rush home and crush a vatful of marigolds.