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.

Gomphocarpus physocarpus (previously Asclepias) is a cool milkweed relative known as balloon plant or hairy balls!

Grevillea victoriae is an evergreen shrub with orange-red, winter-blooming, tubular flowers loved by Anna's hummingbirds.

‘Disney’ produces racemes of fragrant, red-orange flowers with tropical-looking foliage that provides interest all season long.

Hedychium 'Anne Bishop' is a hardy ginger that produces large fragrant clusters of orange-yellow flowers with orange stamens in late summer.

Hedychium 'Pink V' is a hardy ginger that will produce large peachy-apricot flowers in late summer and fall with a light fragrance.

Hedychium 'Tahitian Flame' is a hardy ginger that produces large apricot flowers during in late summer with a strong, sweet fragrance.

Helenium Mariachi 'Bandera' produces deep red petals with yellow tips around dark centres.

Helenium Mariachi 'Fuego' is a short and compact multicolored sneezeweed with hot red petals edged in bright yellow.

Helenium Mariachi 'Salsa' produces spicy, red petals with orange highlights around dark centres.

Helenium Mariachi 'Fuego' is a short and compact true red sneezeweed.

Helenium Mariachi 'Sombrero' is a short and compact yellow sneezeweed.

Helenium 'Potter's Wheel' produces red petals with yellow edges around dark centres.

Helenium 'Double Trouble' has ruffly, double yellow flowers all summer.

Helenium 'Moerheim Beauty' has long-blooming flowers in shades of fire engine red, orange and yellow.

Helenium 'Ruby Tuesday' has long blooming, deep red flowers with button eyes that mahogany eyes that change to yellow.

Helianthus maximiliani is a towering perennial that can reach 9 feet high with spires of bright yellow daisies.

Helianthus tuberosus, Jerusalem artichoke or sunchoke, is a large perennial sunflower with edible tuberous roots.

Helianthus 'Lemon Queen' is an excellent border perennial with four foot tall stems topped with pale yellow daisies in summer.

Helianthus 'Suncatcher' is a dwarf perennial sunflower with large, yellow flowers and dark centres.