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Perennial O-R

A-BC-EF-KL-PS-TU-Z
Orange Peel Plant

Orange Peel Plant

Aromatic, light yellow and red-edged, greyish-green, heart-shaped foliage and tiny, yellowish-green flowers surrounded by white, petal-like bracts.

Oriental Poppy

Oriental Poppy

This striking oriental poppy is excellent for a sunny, well drained border.

Ornamental Onion

Ornamental Onion

This tall, exotic-looking spherical perennial is perfect for adding vertical interest in a sunny, well-drained border.

Orpine

Orpine

This lovely orpine looks great planted in bold drifts in the middle of a sunny, well-drained border.

Paeony / Peony

Paeony / Peony

This lovely, long lived, late flowering peony is perfect for a border in full sun or partial shade.

Pasque Flower

Pasque Flower

Pasque flowers are often found growing on ancient earthworks or at the edges of Roman roads.

Peach-leaved Bellflower

Peach-leaved Bellflower

These lovely, light-blue bellflowers make excellent cut-flowers.

Penstemon

Penstemon

This multi-coloured penstemon continues flowering until the first frosts if deadheaded regularly.

Penstemon Garnet

Penstemon Garnet

This vibrant, easy-to-grow perennial commemorates an 18th century German astronomer.

Perennial Phlox

Perennial Phlox

This delightful perennial phlox is perfect for a 'cool' planting scheme based on blue shades.

Perennial Phlox (syn. Mount Fuji)

Perennial Phlox (syn. Mount Fuji)

This long-flowering perennial phlox is perfect for a mixed or herbaceous border in sun or partial shade.

Persicaria

Persicaria

This low-growing, evergreen perennial is excellent all year ground cover for the front of a damp border in sun or partial shade.

Phlomis

Phlomis

An erect perennial that is perfect for a sunny mixed border or shrub border.

Phlox

Phlox

This spreading, semi-evergreen phlox creates a beautiful fragrant edge for a well-used path in partial shade.

Phygelius

Phygelius

This splendid, summer-flowering, evergreen shrub is ideal towards the back of a sunny, well-drained mixed border, sheltered from cold drying winds.

Pinkroot

Pinkroot

A striking hardy perennial that was introduced last year and is ideal for growing in borders or in pots on the patio.

Plaintain Lily

Plaintain Lily

The glossy foliage of this handsome hosta are, allegedly, less likely to be demolished by slugs and snails.

Plantain Lily

Plantain Lily

Smooth, heart-shaped, grey-blue foliage with golden centres and spikes of lavender-grey flowers in June and July.

Plume Poppy

Plume Poppy

Unlike other flowering perennials of similar height this handsome plume poppy seldom requires staking.

Poppy

Poppy

Each of the delicate blooms has a sizable black mark at the base.

Prairie Mallow

Prairie Mallow

This wonderful prairie mallow tolerates a variety of soil conditions, except water-logging.

Purple Moor Grass

Purple Moor Grass

Ideal for the middle of the border where the spikelets will catch every breeze and last well into fall.

Red Bistort

Red Bistort

Long, narrow spikes of bright red flowers are borne from midsummer to eary fall above semi-evergreen, lance-shaped, classical green foliage.

Red Hot Poker

Red Hot Poker

These fiery, torch-like flowers are excellent for a planting scheme based on hot colours.

Regal Lily

Regal Lily

An incrediably common lily wide range with almost clean white flowers and orange anthers and the huge trumpet-shaped blooms are highly perfumed too.

Rock Cranesbill

Rock Cranesbill

It soon forms a strongly aromatic carpet of deeply cut, pale green foliage, which colour beautifully in fall.

Rodgersia

Rodgersia

This handsome leaves plant is perfect for the damp margins of a pond or stream.

Rusty Foxglove

Rusty Foxglove

An unusual variation on the common foxglove which looks lovely in a shady corner of the garden.