My Cups Runneth Over (With Bees)….

(Hmmm. I just re-read my title and almost changed it, but decided not to. Snicker away – I’m going with “cups”.)

My second yellow-gold blog for July (the first was on companion plants for blackeyed susans) honours another composite prairie perennial that has pride of place in my meadows at Lake Muskoka.  Cup plant or Indian cup (Silphium perfoliatum) gets both its common name and Latin specific epithet from the way the leaves encircle the stem, thus making the stem appear to pierce the foliage – i.e. a ‘perfoliate’ habit.

This clasping leaf arrangement creates a kind of ‘cup’ in which water can collect after rains, supposedly providing drinking water for birds and insects. Alas, insects are often found floating in the water, with some experts suggesting that it may actually act as a deterrent against insect pests that might climb up the stem.

While it is a fabulous native, indigenous to moist woods and prairies in much of mid and east North America, including my province Ontario, its tendency to colonize makes it problematic. In fact, though it is classified as “threatened and endangered”in Michigan, it is “potentially invasive” and banned for sale in Connecticut. I received my fleshy roots from the compost bins of Toronto’s beautiful Spadina House gardens, and the gardeners gave me fair warning that it was invasive, and hard to dig up to control its spread. So I don’t; I merely enjoy it and give thanks for it when the bumble bees are nectaring on the big yellow flowers.

Here are bumble bees in action, along with a surprise visitor for whom those itty-bitty leaf pools are no deterrent, when tasty cup plant seedheads are the rewards for ascending that thick stem.

Honey bees love cup plant as well. There are no apiaries near my cottage on Lake Muskoka, but I photographed this one in the meadows at Miriam Goldberger’s Wildflower Farm an hour so south.

Butterflies like the monarch enjoy cup plant, too.


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I grow cup plants near my stairs so I can photograph the pollinators at eye level.

But they’re in my meadows as well. Though they prefer adqequate moisture in the soil, they are surprisingly drought-tolerant (as they’ve had to be this hot, dry summer), but will develop yellow leaves and stunted flowers in time. Here’s a colony below my bedroom window amidst sweet blackeyed susans (Rudbeckia subtomentosa) still to come into flower.

They make good companions to gray-headed coneflowers (Ratibida pinnata), which bloom at the same time.

They are easily the tallest perennials I grow. Last summer (a season of good rains), I lay down the loftiest stems so I could do a measurement. Yes, 9 feet.

I leave you with a little narrated tour…..

….and a cottage bouquet showing cup plant flowers in the bottom tier, surrounded by summer flowers like ratibida, perovskia, liatris and goldenrod.  Yellow/gold for July 2016, over and out.

Bouquet-Cup Plant & friends

21 Hot Dates for Blackeyed Susan

Here we are in July, my Paintbox Garden month for yellow/gold. and what more summery illustration of that sunny part of the paintbox than blackeyed susan!

Rudbeckia hirta closeup

When Carl Linnaeus named the genus of North American plants that include the ones we call blackeyed susan as Rudbeckia, he was honouring someone very cherished in his life, his Uppsala University mentor and fellow botanist Olof Rudbeck the Younger (1660-1740).  In 1730 Linnaeus moved into Rudbeck’s house where he became tutor for his three youngest children (of 24 in total by three wives!). It was Rudbeck who recommended Linnaeus as lecturer to replace him and as the botanical garden demonstrator, even though he was only in his second year of studies.

In Wilfrid Blunt’s 1971 biography, Linnaeus, The Compleat Naturalist, the author quotes Linnaeus: “So long as the earth shall survive and as each spring shall see it covered with flowers, theRudbeckia will preserve your glorious name. I have chosen a noble plant in order to recall your merits and the services you have rendered, a tall one to give an idea of your stature, and I wanted it to be one which branched and which flowered and fruited freely, to show that you cultivated not only the sciences but also the humanities. Its rayed flowers will bear witness that you shone among savants like the sun among the stars; its perennial roots will remind us that each year sees you live again through new works. Pride of our gardens, the Rudbeckia will be cultivated throughout Europe and in distant lands where your revered name must long have been known. Accept this plant, not for what it is but for what it will become when it bears your name”.

The painting of Rudbeck, below, hangs at Uppsala University.

Olof RudbeckYounger

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I am a great fan of biennial blackeyed susans (Rudbeckia hirta). They have been an integral part of my little meadows here on Lake Muskoka since we built our home in 2002. In fact, they were the plants I sowed initially, along with red fescue grass (Festuca rubra), to retain the sandy soil we placed on the property once construction was finished.  And it’s a bit of an understatement to say that they grew well, given they had no competion yet from other tough customers.  They grew extraordinarily well here.

Rudbeckia hirta-Lake Muskoka

When I think back to the summer of 2003, it’s of having these amazing ‘lawns’ of blackeyed susans, which later evolved (with a lot of research and work on my part) into more complex meadow-prairies.

Rudbeckia hirta-Blackeyed Susan Meadow

I spent summer 2003 photographing them, and had a little photo show the next summer – long before I switched to digital.

Janet Davis-Rudbeckia hirta

I even wrote about them for Cottage Life magazine, given that they seemed like the ‘way back’ for our property from construction site to buzzing, fluttering habitat (and, ultimately, a much more bio-diverse place than our little shore had ever been).

Cottage Life-Blackeyed SusansThey became part of the pollinator landscape here, attracting all types of bees and butterflies.

Rudbeckia hirta - leafcutter bee

Over the years, I’ve chronicled the lovely plant pairings that pop up – because I never know where this little biennial will be next. Unlike its more refined, floriferous, multi-stemmed, perennial cousin Rudbeckia fulgida ‘Goldsturm’, which I’ll talk about later in this blog, common blackeyed susan is a single-stemmed will-o-the-wisp, its seeds spread by birds, its short 2-year lifespan all there is (leafy rosette the first season, flowers the next). Occasionally, depending on the length of the flowering season, it might emerge and flower in the same year, or it might even hang around to flower a second year, but that is rare. However, individual plants can begin flowering from June well into September, so its plant partners can be highly varied – as varied as the ones in this cottage bouquet I made years ago.

Rudbeckia hirta-in bouquet

Hot Dates for Susan

1)  In my own garden at the cottage, wild beebalm (Monarda fistulosa) is a hardy perennial that I adore for its attractiveness to bees and hummingbirds. In fact, I have two small meadows that I call my “monarda meadows”.  And this is how it looked growing alongside Rudbeckia hirta at Niagara Botanical Garden’s Legacy Prairie

Rudbeckia hirta & Monarda fistulosa-Niagara-Legacy Prairie

Here’s a closer look at this duo in another garden. Note the dark streaks on this blackeyed susan; it’s one of many selected strains that come under the heading “gloriosa daisy”. Genetically, they’re no different from common Rudbeckia hirta wildlings, but have traits that make them worth growing as separate seed mixes, in this case ‘Denver Daisy’.

Rudbeckia hirta & Monarda fistulosa

2) Here is blackeyed susan at the Legacy Prairie with swamp milkweed (Asclepias incarnata). Note that it will tolerate very dry, sandy conditions and remain quite compact, but if grown in the kind of moisture-retentive soil that swamp milkweed prefers, it will grow much taller.

Rudbeckia hirta2 & Asclepias incarnata

3) In contrast, this is how it looks growing in sandy soil with the more drought-tolerant butterfly milkweed (Asclepias tuberosa) here at Lake Muskoka.

Rudbeckia hirta & Asclepias tuberosa

4) Similarly, in dry soil blackeyed susan will be happy with hoary vervain (Verbena stricta), one of the toughest customers in my meadows….

Rudbeckia hirta & Verbena stricta
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5) ….. while more moisture-retentive soil creates conditions for blue vervain (Verbena hastata) – and taller blackeyed susans.

Rudbeckia hirta & Verbena hastata-Niagara-Legacy Prairie

6) There is simply no better bee plant than mountain mint (Pynanthemum sp) (unless it’s calamint).  Here is Virginia mountain mint (P. virginianum) at Niagara’s Legacy Prairie growing with blackeyed susans.

Rudbeckia hirta & Pycnanthemum virginianum - Legacy Prairie - Niagara Botanical Garden

7) I grow the smaller veronica Veronica spicata ‘Darwin’s Blue’ in my meadows. Surprisingly drought-tolerant, it is lovely with blackeyed susans.

Rudbeckia hirta & Veronica 'Darwin's Blue'

8) Another blueish-purple plant that makes a good sidekick to blackeyed susan is English lavender (Lavandula angustifolia), shown below along with Anthemis tinctoria. A surprisingly hardy subshrub, its main requirement is dry feet in winter; it will languish and die if the soil stays moist.

Rudbeckia hirta & Lavandula angustifolia

9) There aren’t many glamorous plants in my meadows, but a brief flirtation with perfumed Orienpet lilies (half Oriental-half Trumpet) several years ago added a touch of the exotic. And I simply love the juxtaposition of a sophisticated lily like ‘Conca d’Or’ with the humble blackeyed susans.

Rudbeckia hirta & Lilium

10) Annual mealycup sage (Salvia farinacea ‘Victoria’) is beautiful with fancy gloriosa daisies (Rudbeckia hirta cv.)

Rudbeckia hirta & Salvia farinacea

11) I adored this colour-echo combination of golden Swiss chard (Beta vulgaris ‘Golden Sunrise’) with dwarf ‘Toto’ gloriosa daisies (R. hirta cv) at Montreal Botanical Garden.

Rudbeckia hirta 'Toto' & Swiss chard & carex

12) An ebullient assortment of gloriosa daisy cultivars mixed with blue cornflowers (Centaurea cyanus) was used in this mini-meadow at Montreal Botanical Garden a few years ago.

Rudbeckia hirta - gloriosa daisies - & Centaurea cyanus

Here’s a closer look at that pairing; the gloriosa daisy cultivar is Rudbeckia hirta ‘Irish Eyes’.

Rudbeckia hirta 'Irish Eyes' & Centaurea cyanus-closeup

The other blackeyed susan I grow is Rudbeckia fulgida var. sullivantii ‘Goldsturm’.  After being named Perennial of the Year in 1999, this bushy plant soared in popularity throughout the world. In the “new American landscape” made popular by Wolfgang Oehme and James Van Sweden, it was deployed alongside ornamental grasses in massive sweeps of gold. It continues to be one of the most popular summer perennials, and spreads very easily (too easily, perhaps, for some).

13) In my city garden, I grow a host of pollinator plants in my front garden, and Rudbeckia ‘Goldsturm’ is the perfect, long-flowering companion to purple coneflower (Echinacea purpurea). Since I enjoy it so much, I suppose it’s not a surprise that the neighbourhood rabbit seems to like the blossoms, too – as I discovered last summer, finding a large clump deflowered.

Rudbeckia 'Goldsturm' & Echinacea

14)  My friend Marnie Wright (whose garden I have blogged about previously) uses ‘Goldsturm’ throughout her Bracebridge garden. I especially like it with summer phlox (Phlox paniculata), and…

Rudbeckia 'Goldsturm' & Phlox

15) ….with agapanthus (Agapanthus africanus), and…. 

Agapanthus & Rudbeckia 'Goldturm'

16) ….with Marnie’s gorgeous daylilies (Hemerocallis ‘Jade Star’).

Rudbeckia 'Goldsturm' & Hemerocallis

At the Toronto Botanical Garden, Rudbeckia ‘Goldsturm’ is used in a few gardens.

17) Here it is with balloon flower (Platycodon grandiflorus), and ….

Rudbeckia 'Goldsturm' & Platycodon grandiflorus

18) …with ‘Diabolo’ ninebark (Physocarpus opulifolius) that has been coppiced to keep it compact, and….

Rudbeckia 'Goldsturm' & Physocarpus 'Diabolo'

19) .. with the prairie grass little bluestem (Schizachyrium scoparium), and…..

Rudbeckia 'Goldsturm' & little bluestem

20) …with great blue lobelia (Lobelia sophilitica).

Rudbeckia 'Goldsturm' & Lobelia siphilitica

At Toronto’s Spadina House gardens, Rudbeckia ‘Goldsturm’ provides huge colour from mid-to-late summer…..

Rudbeckia 'Goldsturm'-Spadina House

21) …. when it celebrates the beginning of autumn with a brilliant splash of gold from (appropriately) goldenrod (Solidago sp.) 

Rudbeckia 'Goldsturm' & Solidago

My work as a matchmaker is done. I hope you found a dance partner or two for your own blackeyed susans!