Onoclea sensibilis
A deciduous fern with finely cut pale green fronds.
Onobrychis viciifolia
A British native wild flower with attractive leaves and pink or red flowers often with purplish veins.
Omphalodes verna ‘Alba’
A semi-evergreen perennial with creeping stems and pretty white flowers in spring.
Omphalodes verna
A semi-evergreen perennial with creeping stems and pretty bright blue flowers with a white eye in spring.
Omphalodes cappadocica ‘Starry Eyes’
An evergreen perennial with lustrous leaves and pretty deep blue flowers with a central white stripe on each petal in early spring.
Omphalodes cappadocica ‘Cherry Ingram’
An evergreen perennial with lustrous leaves and pretty deep blue flowers in early spring.
Omphalodes cappadocica
An evergreen perennial with lustrous leaves and pretty azure-blue flowers in early spring.
Olsynium douglasii
A clump-forming alpine with rush-like, grey-green leaves and nodding, bell-shaped, rich purple flowers.
Olearia x macrodonta
An upright shrub with holly-like glossy, dark green leaves and dense clusters of fragrant, daisy-like, white flowers with a reddish brown eye in summer.
Olearia x haastii
A dense bushy shrub with glossy, dark green leaves and dense clusters of daisy-like, white flowers with a yellow eye from mid to late summer.
Olearia x haastii
A dense bushy shrub with glossy, dark green leaves and dense clusters of daisy-like, white flowers with a yellow eye from mid to late summer.
Olearia ‘Waikariensis’
An evergreen bush with olive-green leaves above, white beneath and clusters of daisy-like, white flowers in summer.