Gasteria 'Flow' forms rosettes of pointed, dark green leaves with raised, rough, white speckling.

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

Gaura lindheimeri 'Siskiyou Pink' is a butterfly gaura with delicate pink flowers on arching stems and dark green foliage.

Gentiana cruciata 'Blue Cross' is a cultivar bred to be easier to grow and to have a bushier, more compact growth habit.

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

Glamini 'Kim' is a dwarf Gladiolus in various shades of purple and white

Gladiolus Glamini 'Romy' is dwarf gladiolus in shades of pink and purple with white stripes.

Gladiolus Glamini 'Thomas' is a dwarf glad with very showy indescribable orange/red blooms with yellow throats.

Gladiolus Glamini 'Zoe' is a dwarf glad with delicate sprays of coral pink flowers highlighted with yellow.

Gladiolus 'Grozny' has delicately ruffled pink and magenta blooms with white throats.

Gladiolus 'Lumiere' offers a combination of hot pink, mauve and violet flowers on long 3-4 foot stems.

Gladiolus 'My Love' offers white flowers gently edged with pretty pink blushes on 3-4 foot stems.

Gloriosa carsonii has striking flowers with yellow rippled petals centred with burgundy-red.

Gloriosa greenii offers greenish yellow to lemon yellow flowers with thick, leathery, lightly rippled petals.

Gloriosa lutea has pale lemon-yellow flowers that are crisped on the edges and turn orange-yellow as they age.

Gloriosa superba 'Himalayan Select' is a rare selection with bright, firey red flowers with recurved tepals (frequently more twisted than the picture) and a lemon-yellow base.

Gloriosa superba 'Rothschildiana' has striking flowers with broad, bright red, rippled petals with golden yellow bases.

Gloxinia 'Emperor Frederick' is a houseplant with velvety bell-shaped blossoms of scarlet red with white edging and undersides.

Gloxinia 'Emperor Wilhelm' is a tender perennial with velvety bell-shaped blossoms of deep purple and white edging and undersides.

Gloxinia 'Tigrina Blue' is a tender perennial with bi-coloured velvety bell-shaped blossoms of white and purple speckles.

Gloxinia 'Violacea' is a tender perennial with multi-coloured velvety bell-shaped blossoms in various hues of purples.

Graptopetalum filiferum is an intriguing species related forming a tight, symmetrical rosette of grey-green leaves each with a pink, hair-like tip.

Graptoveria (Echeveria) 'Chanel' has thick, rounded leaves in powder blue that develop pink tones on older foliage.

Graptoveria (Echeveria) 'Lovely Rose' forms interesting, squished, silver rosettes that are not completely symmetrical.

Graptoveria (Echeveria) 'Rose Queen' ('Stone Rosa') has beautiful lavender-blue leaves highlighted with glowing pink.