Rudbeckias produce a wonderful display of bright yellow, daisy like flowers with black centres in late summer. A must have in every garden as it flowers late in the season so will give your garden late summer/ early autumn colour. A very reliable performer.
Goldsturm has a taller habit and is ideal mid border.
Use a granular fertiliser incorporated in to the soil when planting, along with plenty of compost or well rotted manure. Liquid feed every 2 weeks or so during the growing season. Leave Rudbeckias to die back gradually through the autumn / winter and tidy up the plants in late winter or early spring by cutting old stems down to the ground. New growth will appear from the ground in spring.