Huernia zebrina or lifesaver plant produces plastic-like, star-shaped, red and yellow petals with a deep red, lifesaver-like ring.

Hydrangea integrifolia is a rare evergreen climbing hydrangea from Taiwan and the Philippines.

Hymenocallis (Ismene) caribaea is a robust spider lily or Peruvian daffodil with pure white, daffodil-like flowers with a round corona & long thin petals.

Hymenocallis festalis or Peruvian daffodil resembles a pure white, spidery daffodil with nice fragrance.

Hymenocallis harrisiana is a very spider-like species with white flowers with small coronas and narrow petals.

Hymenocallis littoralis is a very spider-like species with white flowers with small coronas and narrow petals.

Hymenocallis 'Zwanenburg’ is noted for having large white flowers that resemble pure white, spidery daffodils with nice fragrance.

The fragrant Carolina spider lily (Hymenocallis caroliniana) resembles a pure white, spidery daffodil.

Hymenocallis (Ismene) 'Advance' resembles a spidery, white daffodil with a round corona, long, thin filaments, yellow stamens, a greenish yellow throat, and stubby, narrow petals.

Hymenocallis (Ismene) 'Sulphur Queen' has spidery, pale yellow, fragrant, daffodil-like flowers with a green throat and stubby, narrow petals.

Iberis sempervirens First Flush 'Lavender' is a candytuft with a long blooming period of bi-coloured lavender and white flowers.

Golden foliage changes to chartreuse green with age. Topped with classic candy tuft white flowers.

Iberis x hybrida Mermaid 'Lavender' is a candytuft with deep lavender flowers.

Iberis 'Sweetheart' is a stunning new colour of flower for the candytufts: lavender! Oh la la!

Ilex crenata 'Mariesii' is a very slow grower. This variety is excellent for bonsai or as a low-maintenance garden specimen.

Ilex crenata 'Sky Pencil' is an incredibly narrow, fastigiate selection of Japanese holly that requires little maintenance.

Iris foetidissima is an evergreen, shade tolerant species with pretty flowers and dramatic displays of orange seeds in autumn.

Iris foetidissima 'Citrina' is an evergreen, shade tolerant species with pretty pale yellow flowers and bright orange seeds in autumn.

Iris japonica, known as fringed or crested iris, has white petals decorated with blue and yellow markings atop evergreen foliage.

Iris japonica 'Aphrodite', known as variegated fringed or crested iris, has white petals decorated with blue and yellow markings atop evergreen foliage.

Iris tenax or tough-leaf iris is a West Coast native with beautiful blue, lavender and purple blooms and evergreen foliage.

Iris unguicularis is a surprising feature of the winter to spring garden with fragrant, blue-mauve flowers from November-March.