Opuntia santa-rita 'Tubac' is a tender Prickly Pear with yellow flowers followed by purple fruit and blue-grey pads that turn purple in winter.

Opuntia sp. (John B.) has mid green new pads becoming bluish with long cinnamon spines & yellow flowers with red centres.

Opuntia utahensis is known as the grizzlybear prickly pear perahps thanks to its copious, long white spines.

Opuntia 'Cyclops'has rounded pads with few spines & only brown glochids like polka-dots with cheerful yellow flowers.

Orostachys ‘Chinese Hat’ is a succulent hybrid that forms succulent rosettes of pale silver/grey foliage with yellow flowers.

Orostachys japonica is a hardy rosette succulent with many cylindrical, pointed, light green leaves that can flush orange.

Osmanthus fragrans f. thunbergii has small, pale yellow, extremely fragrant, edible flowers famous in China for use in teas and other foods.

Othonna capensis or little pickles is an extremely hardy ground-covering succulent with blue-green leaves and yellow daisy flowers.

Pachyphytum bracteosum 'Silver Jelly Bean' is an Echeveria relative with thick, oval, silver-blue leaves and yellow flowers.

Pachyphytum compactum has thick, rounded, pointed, grey-green leaves with white crystal-like markings.

Pachyphytum oviferum is a gorgeous succulent with palest silver blue, rounded, balloon-like leaves that can flush pink.

Pachyphytum 'Blue Haze' has broad, flattened, rounded, succulent leaves that can be silver blue or flush with pink.

Pachyphytum 'Pink Bunny' has broad, flattened, succulent leaves that can be palest silver blue or flush with pink with a little stress.

Pachyphytum 'Solomon' is an Echeveria relative with thick, cylindrical, powder blue, succulent leaves with pointed tips.

Pachyveria 'Dr Cornelius' has thick, flattened, cylindrical, silver blue, succulent leaves with pointed tips.

Packera is a daisy relative that forms a great groundcover for sun or shade with cheerful yellow flowers.

Packera obovata is a daisy relative that forms a great ground cover for sun or shade with cheerful yellow flowers.

Paeonia lactiflora 'Lemon Chiffon' is a unique pale yellow peony with large, fragrant, semi-double to double flowers.

Paeonia ‘Primevere’ has large, single cups of cream-coloured petals and a large, ruffly, golden yellow centre.

Paeonia 'High Noon' is a lutea hybrid with fragrant, golden yellow flowers and stamens.

A species tree peony with yellow flowers.

Paeonia 'Bartzella' has warm butter yellow flowers with orange-red centres.

Paeonia 'Border Charm' is an Itoh peony with bright yellow petals with a coral centre.

Paeonia 'Canary Brilliants' are creamy yellow with highlights of apricot and pink.

Paeonia 'Candy Cane' has yellow flowers with variable magenta to red striping. Itohs are exciting crosses between tree and garden peonies.