Vallea stipularis

A relative of Crinodendron and Aristotelia with small pink cup shaped flowers and variable leathery leaves.

This is a lax scambling species, best grown as a wall shrub or through other shrubs. Not considered very hardy in the UK – there is nevertheless a large specimen on a wall at Wakehurst

£20

Titanotrichum oldhamii

Classic gesneriaceae - sturdy basal rosette of fleshy crinkly leaves and stems of foxglove like flowers emerging from the centre. The flowers are a very striking bright yellow, deep red inside, and the leaves are purple on the reverse. Not well tried outdoors in the UK, but the main problem overwintering temperate gesneriads usually is not the cold so much as keeping them dry in winter, This doesn't seem to be a problem in this case.

Titanotrichum is best in a moist woodsy soil, and it is imperative that it does not dry out in summer, or else the flower buds will turn to tiny tubers (gemmae). A solid and vigorous woodland perennial as long as it has enough water

£10

Sophora flavescens

A herbaceous species from China with pale yellow, somewhat monk's-hood like flowers on slender stems over elegant pinnate foliage. A cool airy alternative to Baptisia and Thermopsis. Fully hardy.

£8

Salvia chamaedryoides

An absolutely gorgeous little Salvia from Texas and thereabouts, sprouting spikes of intense indigo violet over low ash-white bushes.

It will, like so many species from this area, need the driest sunniest site you've got but is cold tolerant and can eventually make quite a sizeable patch.

£6

Rhodiola rosea

Our native rose root – quite a common plant of uplands and crags forming dense clusters of grey succulent leaves on stems radiating from a compact root.

Clusters of yellow flowers appear at the ends of the shoots in spring. Very adaptable to any sunny well-drained spot

£6

Pycnanthemum muticum

Another North American that certainly deserves to be better known. Forms colonies of upright stems with fresh green rounded leaves ultimately developing an almost Euphorbia-like inflorescence of tiny white flowers subtended by silvery white bracts. At this stage the whole plant has a pale silvery sheen.

Not invasive. Has a lovely fresh peppermint fragrance too, and can be used in the same way. Any soil.

£8

Phlomis atropurpurea

Very different to the sub-shrubby Mediterranean types. This is a herbaceous species from Asia with dark maroon flowers in small whorls among green leaves.

Prefers plenty of moisture and doesn’t need full sun.

£8

Lathyrus vernus cyaneus

One of the best forms of the European spring vetchling – with flowers of a pure inky blue and not a trace of purple or pink

£7

Hydrophyllum canadense

A handy woodlander for perhaps a wildish part of the garden – the leaves resemble a creeping buttercup being lobed, dark green and marked with silver – very attractive when they appear. Copious white flowers in broad cymes in spring give a beautiful frothy effect.

Not weedy but likely to seed about a bit.

£6

Chrysogonum virginianum australe

A terrific small sunflower type making a compact clump of deep green leaves and bright golden flowers over a long period. Very adaptable to a variety of conditions.

This is the southern form of the species and to my mind, definitely the nicer plant – more compact and better colours.
£6

Ceanothus papillosus

A gorgeous and rarely seen species with sky blue flowers and glistening, slightly sticky leaves.

Reputedly not quite as hardy as the popular hybrids but it’s been undamaged for many years with me here in SE England.

£12

Biarum tenuifolium abbreviatum

Black arum flowers at soil level in autumn followed by narrow leaves. Full sun and excellent drainage – ideally dry in summer and protected from the worst of the winter weather
£8

Boehmeria sieboldiana

Shiny fresh green attractively veined and serrated nettle leaves on a lush bushy plant to 4ft tall. Whitish flowers. Moist woodland ideally but adaptable
£8

Arthropodium milleflorum

A very pretty and understated plant found growing among the grasses and other herbs under Eucalypts over large parts of south-eastern Australia, where it is very adaptable.

In the UK it will be less adaptable (shade in England is not like shade in New South Wales) but given a well-drained soil and sun or light shade it is quite hardy and the delicate mauve flowers on tall, slender arching stems (to 3ft high) give a fresh, light effect in the border.

£6