'Frostproof' is a hardy gardenia with double rose-like flowers with intoxicating gardenia fragrance and good bloom even in cool springs and summers.

'Kleim's Hardy' has incredible gardenia fragrance and is hardy to minus 18 degrees Celsius! Go figure.

‘Summer Snow’ has beautiful pure white double flowers that are sweetly fragrant. Reportedly hardy to zone 6 which would make it the hardiest of the hardyGardenia.

Gasteria 'Little Warty' has light grey-green leaves with raised pale silvery-green stripes with bumpy tubercles.

Gasteria 'Silver Bullion' is an intriguing variegated succulent in shades of forest green, grey-green, light green and ivory white.

Gaultheria procumbens 'Berry Cascade' is a great hardscape groundcover with berries growing the entire length of the stem.

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.

Gladiolus carneus is a South African native with large flowers in shades from white through pink with dark pink markings.

Gladiolus communis subsp. byzantinus is a hardy species to zone 6 with bright magenta flowers.

Gladiolus italicus is a smaller, hardy gladiola with delicate magenta flowers.

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

Gladiolus nanus 'Elvira' has orchid-like, palest pink flowers with bold dark pink spots and a dark pink throat.

Gladiolus nana is a smaller, hardy Gladiolus native to Africa. 'Halley' has ivory flowers with creamy centres.

Gladiolus nanus 'Impressive' has orchid-like, light pink flowers with bold red and magenta prints on the upper three petals.

Gladiolus nanus is a smaller, hardy gladiola. 'Nymph' has white florets with pretty, hot pink markings.

Gladiolus 'Prins Claus' has orchid-like, pure white flowers with bold magenta and pink spots on the three lower petals.

Gladiolus nanus 'White Eyed Miss' has orchid-like, soft rose pink petals with striking white eyes edged in red.

G. papilio is a hardy gladiolus with slate-lilac flowers.

Gladiolus papilio 'Ruby' is a hardy glad with stunning, bright magenta red flowers.

Gladiolus primulinus 'Atom' is a 1946 hybrid with graceful, scarlet flowers with a white picotee edge.

Gladiolus primulinus 'Las Vegas' is a hardy glad with yellow funnel-shaped flowers with broad orange-red borders.

Gladiolus primulinus 'Laura Jay' is a hardy glad with funnel-shaped flowers with red and white contrasting petals.

Gladiolus ramosus 'Vulcano' is a real stunner in hardy glads with magenta-pink flowers with lavender-purple chevrons.