Tricyrtis 'Omokage' is a toad lily with purple-tipped white flowers with delicate purple spots.

Tricyrtis 'Oniji' is a unique toadlily with purple and blue petals and a central white stripe.

White flowers with delicate purple spots and intricate centres.

Tricyrtis 'Raspberry Mouse' is a dramatic toad lily with bold raspberry chocolate petals.

Tricyrtis 'Seiryu' is a toad lily with light purple flowers with dark purple spots.

Large white orchid-like flowers with warm purple spots and yellow stamens. A late summer beauty for the shade garden.

Large white flowers with broad petals, purple at the tips and lightly spotted.

Tricyrtis 'Taipei Silk' is a gorgeous hybrid with glossy dark green leaves and spectacular multi-coloured flowers.

The narrow petals are white with pink tips and the wider petals are pink fading white at the bottom.

Pale yellow flowers with bronze dots look like intricate orchids in the shade garden.

Trillidium (Trillium) govanianum is a rare Himalayan species of mid to high elevation forests.

Trillium albidum is rare in cultivation and so elegant in the shade garden with sessile white petals and mottled foliage.

Trillium apetalon is a very rare oddball Japanese species in which the petals are missing and the sepals are red to burgundy.

Trillium grandiflorum 'Flore Pleno'/'Plenum' is a rare and exquisite double form of the snow trillium with white rose-like flowers. Spectacular.

Trillium grandiflorum 'Snowbunting' is a rare and exquisite double form of the snow trillium with creamy white flowers. Spectacular.

Trilium kamtschaticum is a sister species from Asia to North America's western and snow trilliums. Beautiful.

Trillium pusillum is a dwarf woodland treasure with green to red-tinged sepals and white petals that age to pink.

Tropaeolum brachyceras is a climbing nasturtium with small leaves and thin tubular bright yellow flowers.

Climbing nasturtium, Tropaeolum speciosum, is a choice climbing vine with dainty stems and delicate, clover-like leaves that erupts into masses of bright red flowers in summer.

Tropaeolum tricolor is a climbing nasturtium with numerous funnel-shaped red, yellow, green, and purple flowers.

Tropaeolum tuberosum is a climbing nasturtium with small leaves and thin tubular orange flowers.

Tropaeolum tuberosum 'Ken Aslet' is an amazing climbing nasturtium with glaucous small leaves and thin tubular orange flowers.

Tulipa greigii 'Fire of Love' has stunning blue-green foliage edged in creamy yellow and striped with red cupping large, bright red flowers.

Tulipa 'Calypso' has fiery orange-red flowers with yellow edges all above attractive blue-green foliage.