If you have any gaps in your borders in late summer, heleniums and rudbeckias will add a splash of rich fiery colour. Watch this video clip from Gardeners’ World to find out how to plant these two North American daisies, which Monty Don is adding to his Jewel Garden. He offers advice on what conditions they need, how to arrange them, and what aftercare to give. He also recommends two gorgeous varieties – orange-flowered perennial Helenium ‘Dark Beauty’ and bronze-yellow biennial Rudbeckia hirta ‘Cappuccino’. Follow Monty’s lead and give them a try.