If I could only have one single yellow flowered perennial in my garden, then it would be a Rudbeckia. In fact, it would be Rudbeckia fulgida ‘Goldstrurm’. Or maybe if I wanted more height it would be Rudbeckia ‘Herbstonne’ , or maybe…………… I like the Rudbeckias – the golden Coneflowers!
The hardy perennial Rudbeckia group can be planted almost anywhere in the garden and in a wide range of soil types with the only exception being boggy ground. I have seen them growing well in light dappled shade, even a woodland garden, and of course absolute full sun.
It would probably be easier to list where it does not like to grow. Ok – here goes. It is not too happy in dark shade or heavy clay soils, but the annoying thing is, that it will still put on a little show for you.
Most of the Rudbeckias we deal with on this page – herbaceous perennials - are fully hardy. In they are very hardy plants that form a clump of foliage out of which springs the flowering stems of various lengths depending upon variety.
The leaves of all are dark green and lance shaped which die down in the autumn and start into re-growth the following spring.
The golden yellow flowers - ‘Goldsturm’ translates roughly into ‘storm of gold’ – are produced singly at the top of the flowering stems. Flowers of the hardy Rudbeckias tend to droop slightly – giving rise to the common name of Coneflower. Before you put finger to email, I realize that the Echinacea is also called Coneflower. Such is the delight and vagaries of common names.
Echinacea were also classed as Rudbeckia for a while, and of course they both belong to the same family as most ‘daisy’ flowers – Asteraceae, which again at one time was named Compositae. I only mention this unimportant fact in case you pick up an old gardening book – or listen to an old gardener who is still rooted in the past! The centre of the flowers of all the hardy Rudbeckias are slightly raised and domed. Even moreso with the variety ‘Herbstonne’.
Position them in the garden wherever you want a bright spot for the several months of summer into late autumn. The flowers take on a deeper gold in the autumn – maybe because of the autumn light! They are perfect border plants and also make a fine solitary lawn bed – maybe surrounded with Lavenders or similar.
Hardy Rudbeckias can be raised from seed, but they differ from the Rudbeckias normally sold by seed of Autumn Shades and Rustic Dwarfs etc. Make sure that the seed stipulated Hardy Perennial. The others are annuals.
The easiest way to get a few more plants is to divide the established crown in late autumn – or better still – early spring. These can be planted out immediately in their new growing flowering position.
Slugs of course are always after a tasty snack. The young and emerging shoots of Rudbeckia can supply that for them. Otherwise, they seem to have no insect pests.
One thing I have noticed is that toward the end of summer, some of the leaf edges tend to show a little browning. I have not found any fungal disease that causes this. Probably just an acceptance that summer is ending!
Rudbeckia fulgida var. sullivantii ‘Goldstrurm. (Image top) This grows to around 60cm tall and forming a clump of foliage 60cm across, with shorter flower spikes than some. ‘Goldsturm’ has a mass of ‘black eyed Susan’ type flowers and deep gold. It is trouble free and as reliable as they come.
Rudbeckia fulgida ‘deamii’ (Image Bottom) is similar, but with hairy foliage and pointed lanceolate leaves.
Rudbeckia ‘Herbstonne’ (Image Centre) I first saw growing in a shaded spot of a shrub border. It was all os 2m – 6ft –tall, and happy with its situation. The flowers – on long stems – are more yellow than the gold of the first two. It is nonetheless attractive. This one spread a little with underground rhizomes but is not invasive – simply easier to divide and multiply your stock! It is later flowering than either R. Goldsturm or R. deamii. Probably the reason it also has the common name of Autumn Sun.