Gaultheria procumbens 'Cherry Berries' is a great hardscape groundcover with exceptionally large berries.

Gaultheria procumbens Winter Fiesta has large, white berries that flush to pink on red stems.

Gaultheria procumbens 'Winter Splash' is the only variegated Wintergreen on the market.

Gazania krebsiana 'Tanager' has large, dramatic, bright orange daisy flowers with intricate black markings around the centre.

Gelsemium 'Margarita' is a hardy Carolina jessamine with masses of large, bright yellow flowers on a semi-evergreen vine.

Gentiana makinoi 'Blue Star' has upright, tubular-shaped violet-blue flowers with yellow stamens and glossy green foliage.

Geranium 'Jolly Jewel Salmon' forms dense, low cushions of bluish-green leaves bearing salmon pink flowers.

Geranium oxonianum 'Southcombe Double' is an unusual, long blooming, semi-evergreen, hardy cranesbill geranium with double pink flowers.

Geranium pratense 'Cloud Nine' is a cranesbill with fully double, light blue flowers and dark green bushy foliage.

Geranium pratense Dark Eyes is a bold cranesbill with single, dark-eyed magenta flowers and burgundy foliage.

Geranium 'Bloom Time' is a cranesbill with single, bright pink flowers, white centres and red veining.

Geranium 'Dreamland' is a cranesbill with soft-pink flowers with pale centres and dark veins on mat-forming plants.

Geranium 'Elworthy Eyecatcher' is a Cranesbill geranium with single flowers emerge pale green with white margins evolving to deep pink.

Gerbera Garvinea Femmy has pink flowers with yellow centres and blooms from spring until fall. Hardy to zone 7!

Gerbera Garvinea 'Sweet Frosting' has snow white flowers with yellow and brown centres blooming from spring to fall. Hardy to zone 7!

Gerbera Garvinea Sweet Love is a Gerbera daisy with red petals and red and yellow centres that blooms from spring to fall. Hardy to zone 7!

Gerbera Garvinea 'Sweet Vibe' is a Gerber daisy with yellow petals and dark centres that blooms from spring to fall. Hardy to zone 7!

Gethyllis cavidens has a white stem covered in black spots that opens into blue-green, twisty, tentacle-like leaves.

Geum coccineum 'Orange Pumpkin' is a long-blooming, red avens with unique, fully double, orange flowers.

Geum Coral Tempest is a long-blooming avens with multitudes of semi-double, peachy-orange flowers.

Geum 'Scarlet Tempest' is an avens that produces a multitude of semi-double flowers or red-orange with yellow centres.

Geum Tempo 'Coral' is a compact avens that produces a multitude of semi-double coral-red flowers.

Geum 'Tempo Orange' produces a multitude of single to double flowers in shades of cream, peach, and orange.

Gladiolus ecklonii is from eastern South Africa with unique white tepals liberally spotted with pink, red or purple.

Gladiolus nanus 'Carine' has orchid-like, ivory white flowers with bright pink markings and a green flush in the throat.