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All ratings refer to the UK growing conditions unless otherwise stated. Minimum
temperature ranges (in degrees C) are shown in brackets
AGM plants have been through a rigorous trial and assessment programme. They are:
This plant will provide nectar and pollen for bees and the many other types of pollinating insects.
It is included in an evolving list of plants carefully researched and chosen by RHS experts. Divided into 3 groups these lists, linked below, are maintained by a team of RHS staff and are reviewed annually.
'Gallery Pablo' is a compact plant to 50cm, with light coral-red flowerheads, the florets shading to apricot-yellow towards the base
'Lucy' is a cultivar that reaches 90cm in height. It flowers early, in late summer to early autumn, bearing sprays of anemone-style flowers with yellow centres and pale pink florets
'Alison Taylor' grows to 60cm in height, with up to 5 flowers per stem, the standards ochre yellow fading to cream in the centre, the falls bright lemon yellow edged with ochre yellow
'Orange Glow' forms a small clump of rounded, palmately lobed basal leaves, with deep yellow flowers 2-3cm wide, sitting above deeply divided green bracts and opening in late winter and early spring
'Wisley Supreme' is a spreading deciduous shrub or small tree, with broadly ovate or rounded leaves and fragrant golden-yellow flowers borne in small clusters on the leafless twigs from mid to late winter
S. flava is a carnivorous perennial to 90cm, with slender yellow-green pitchers with erect lids, and nodding yellow flowers 10cm across
'Variegatum' is a semi-evergreen perennial forming a low clump to 10cm in height, with fleshy, bluntly toothed obovate leaves margined with creamy-white and tinged pink, and loose clusters of starry bright yellow flowers in late summer
'Fireworks' is a slowly clump-forming, non-invasive, cultivar. It flowers in late summer through to autumn. Its sprays of tiny yellow flowers are held in finer wands than many of its more densely-flowered relatives
T. tricolor is a summer-dormant, tuberous, perennial climber to about 1.5m with small, light green, five- or seven-lobed leaves. The small, yellow flowers are surrounded by a showy purple-tipped, orange-red calyx with a long red or purple spur, in all about 3cm long. Flowering takes place from winter to early summer
'Dainty Marietta' is a dwarf French marigold growing to 35cm in height, with pinnate green foliage and single, bright yellow flowers, each ray with a deep red blotch at the base, from late spring to autumn
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