20
Bring some sunshine to your borders with this resilient cottage-garden favourite. Neat clumps of tall, elegant stems with striking yellow flowers are borne from mid-summer through until early autumn. Golden Lysimachia punctata is great for difficult clay soils and shadier parts of the garden, thriving in damp borders, bog gardens or at the margins of a pond. Grow dotted loosestrife in woodland gardens or informal areas for a burst of late summer colour! Height: 90cm (35). Spread: 60cm (24).