Fritillaria aurea 'Golden Flag' is a short species from Turkey with large golden yellow bells lightly speckled with red.

Fritillaria davisii has unusual nodding flowers in burgundy-brown and yellowish green.

Fritillaria imperialis 'Lutea Maxima' has lush green foliage and bright lemon yellow flowers.

The nodding yellow flowers of Fritillaria pallidiflora are some of the last of the genus to bloom.

Fritillaria thunbergii is a rare species with linear, bluish green leaves each with a curling tendril and pendulous, pale yellow flowers.

Gaillardia Commotion 'Moxie' is a blanket flower with warm yellow fluted petals around orange-red centres. Mounds of colour all summer long.

'Colorado Gold' is an unusual, super hardy Gazania with narrow, dark green foliage and large, bright yellow, daisy-like flowers.

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

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

'Tequila Sunrise' is a Geum with semi-double flowers with lemony yellow petals and flushes and edges of rose-red.

Geum Tempo Yellow produces multicoloured, semi-double flowers in shades of pink, peach, yellow, and creamy yellow all at the same time.

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

Gladiolus 'Irish Gold' is a hardy gladiola with large, ruffled yellow flowers with a green glow

Gladiolus 'Goldrush' has delicately ruffled yellow blooms edged with an orange-coppery glow.

Globba schomburgkii has large, dark green, tropical leaves and large, golden yellow clusters of branched, ginger-like flowers.

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.

Grewia asiatica is a small deciduous shrub known as sherbet berry that produces sour-sweet edible purple berries.

Hedychium flavum is a hardy ginger with lemony yellow, fragrant, tropical flowers on tall stems.

Hedychium gardnerianum is a hardy ginger with big, bold, beautiful heads of subtropical flowers in yellow and orange.

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

Hedychium 'Molten Gold' is a hardy ginger with rich yellow, fragrant, tropical flowers on short stems.

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