We have found 24 plants that meet your criteria.

Yarrow ‘Achillea filipendulina Cloth of Gold’ Flat, plate-like yellow flowers on tall stems £5.99 Buy
Yarrow ‘Achillea Moonshine’ Lovely, large sulphur-yellow flowers £5.99 Buy
Rock Bells ‘Aquilegia canadensis’ Delicate, nodding flowers. Ideal in a meadow £4.99 Buy
Price Pruned
Granny's Bonnet ‘Aquilegia Yellow Queen’ Elegant lemon yellow flowers NOW £3.99 Buy
Valerie Finnis Artemisia ‘Artemisia ludoviciana Valerie Finnis’ Very drought tolerant £5.49 Buy
Price Pruned
Wormwood ‘Artemisia Powis Castle’ Silvery, aromatic foliage NOW £4.99 Buy
Wood Spurge ‘Euphorbia amygdaloides Purpurea’ Lovely deep purple foliage and acid-yellow flowers £5.49 Buy
Wood Spurge ‘Euphorbia amygdaloides var. robbiae’ Great for a woodland setting £5.49 Buy
Spurge ‘Euphorbia characias Silver Swan’ Delightful variegated foliage £6.99 Buy
Spurge ‘Euphorbia characias subsp. wulfenii’ Handsome tall evergreen with chartreuse flowers in spring £5.99 Buy
Price Pruned
Cypress Spurge ‘Euphorbia cyparissias Fens Ruby’ Dusky purple leaves and bright yellow flowers in summer NOW £5.49 Buy
Price Pruned
Spurge ‘Euphorbia palustris’ Bright green flowers. Ideal for a woodland edge or sunny border NOW £3.99 Buy
Price Pruned
Spurge ‘Euphorbia polychroma’ Vivid acid yellow flowers NOW £5.49 Buy
Spurge ‘Euphorbia Whistleberry Garnet’ Bold evergreen foliage £6.49 Buy
Stinking Gladwyn ‘Iris foetidissima’ Bright orange berries. Useful for dry shade £5.99 Buy
Phlomis ‘Phlomis russeliana’ Pretty whorls of pale yellow flowers £6.99 Buy
Price Pruned
Columbine ‘Aquilegia McKana Hybrids’ Bonnet-like flowers in a range of colours NOW £4.99 Buy
Price Pruned
Spurge ‘Euphorbia x martinii’ Perfect for a small sunny border NOW £6.49 Buy
Price Pruned
Daylily ‘Hemerocallis citrina’ Star-shaped, lemon-yellow flowers NOW £5.49 Buy
Price Pruned
Daylily ‘Hemerocallis Golden Chimes’ Deep yellow, lily-like flowers NOW £4.99 Buy