Dahlias Are superb Garden Plants There Are Varieties To Suit Any Size Garden & Just About Any Planting Scheme. Beautiful Foliage & Innumerable Flower Forms ð The Choice Is Almost Overwhelming. We Have Selected A Few Of Our Favourites To Give You Plenty Of Options For Your Preferred Planting Style.deepest & Darkest Velvety Blooms. This Collection Contains Some Of The Richest & Most Sumptuous Dark Dahlia Flowers You Will Find. Incredibly Easy To Grow, They Flower Abundantly & With Their Mix Of Different Flower Shapes They Look Incredible In A Vase.flowers July-october.height 75-100cm/30-39in.