What's in Bloom

Anemone tomentosa 'Robustissima'

Featured Bloom: Grapeleaf Anemone (Anemone tomentosa 'Robustissima')

Commonly called windflower or Japanese Anemone, Anemone tomentosa ‘Robustissima’ features 2- to 3-inch pale pink flowers that grow on wiry 3- to 4- foot flower stems, which seem to float above the plant's foliage. The flowers typically bloom August to October, providing some late-season interest to perennial borders, woodland gardens and cottage gardens -- they also make great cut flowers. Native to north and central China, this vigorous perennial prefers evenly moist, well-drained soils in full sun to part shade.  

You’ll find Anemone tomentosa ‘Robustissima’ at the Arboretum in the Spiegel Entrance Garden, Morgan Terrace Garden, Elizabeth Carr Slade Perennial Garden and Ornamental Grass Collection.

What Else Is Blooming

Aromatic Aster (Symphytotrichum oblongifolium)
Native to the northeastern and central United States, this perennial blooms in late summer through early fall.  When in flower, this plant will produce daily-like flowers with blue to purple rays and yellow center disks.  This plant is attractive to pollinators such as butterflies, and also works well as a cut flower.

New York Aster (Symphyotrichum novi-belgii 'Professor Anton Kippenburg')
‘Professor Anton Kippenburg’ is a dwarf selection of New York Aster that flowers in late summer through fall.  The plant will produce flowers in shades of blue to purple that are semi-double.  Attractive to birds and butterflies, this perennial is also deer and rabbit resistant. 

Sunflower (Helianthus 'Lemon Queen')
‘Lemon Queen’ was given the Award of Garden Merit by the Royal Horticulture Society.  Reaching heights of 6 to 7 feet, this perennial provides late season interest with its pale yellow flowers.  The plant can bloom for up to 6 weeks, providing a long window of interest in the garden.

Dahlia (Dahlia)
An annual favorite among most gardeners, Dahlias are known for their flamboyant display of flowers. Their blooms span the whole spectrum of the rainbow. Grown from tubers, these annuals are highly collectible and provide mid to late summer interest. They are also a huge attraction to pollinators, including butterflies.

Garden Mum (Chrysanthemum 'Minngopher')
Introduced by the University of Minnesota in 1977, ‘Minngopher’ is known for its small pompon flowers that are ruby-red when in bloom.  Producing a cushion habit, this is one of the earlier blooming hardy garden mum cultivars introduced by the University of Minnesota.

Showy Stonecrop (Hylotelephium spectabile 'Herbstfreude')
Blooming in late summer through fall, 'Autumn Joy' is a magnet for pollinators looking for their last source of food for the growing season.  When in bloom this plant produces dense displays of star-shaped, pink flowers atop thick succulent-like stems.  It works best in a rock garden or along a sunny border.

Hungarian Daisy (Leucanthemella serotina)
Native to parts of Europe and Asia, this perennial is a recipient of the Award of Garden Merit from the RHS.  Reaching heights of up to 6 feet, this plant will bloom in the late summer to early fall with bright, white flowers. and golden centers.

Zig-zag Goldenrod (Solidago flexicaulis)
Native to North America, the zig-zag goldenrod is easily identified by its zig-zag stem. While most goldenrods can be found in full sun situations, this goldenrod actually prefers to be planted in shade. Blooming in late summer through fall, this goldenrod will produce vibrant, golden clusters.

Great Blue Lobelia (Lobelia siphilitica)
Related to the cardinal flower, the great blue Lobelia blooms a bright blue in late summer and early fall. This plant grows best in shade, so it works as an excellent addition to a woodland garden. This plant is native to eastern North America.

Rose (Rosa)
The Wilson Rose Garden is one of our most colorful collections featuring the pinks, reds, whites and oranges of a myriad of rose species, selections and hybrids.

Smooth Aster (Symphyotrichum laeve)
Smooth Aster is a late blooming, native perennial that is hardy to zone 3. A non-aggressive spreader, this plant is host to the silvery checkerspot and the pearl crescent butterflies. The flowers provide interest with their blue to purple rays and yellow center disks.

Black-eyed Susan (Rudbeckia 'American Gold Rush')
‘American Gold Rush’ is an All-America Selections 2020 winner that was bred at Intrinsic Perennial Gardens, Inc. Compact in habit, this cultivar of black-eyed Susan produces profuse amounts of gold flowers that bloom from summer through early fall.

Windflower (Anemone × hybrida 'Andrea Atkinson')
The Heath Aster is a drought-tolerant plant as it thrives in medium to dry soils. Blooming in late summer through early fall with white ray flowers, this native perennial can be aggressive if left to go to seed. This plant is host to the pearl crescent butterfly.

Heath Aster (Symphyotrichum ericoides)
Producing semi-double white flowers atop stems that can reach up to 5 feet, the ‘Andrea Atkinson’ windflower blooms in late summer to early fall. This plant is hardy to zone 4 and prefers to be in full sun or partial shade. Planted in mass, this perennial will be sure to provide any garden with an excellent late season show.

Showy Stonecrop (Hylotelephium telephium 'Matronna')
‘Matrona’ is a winner of multiple European awards that provides interest throughout the entire growing season. When in bloom, this showy stonecrop produces masses of pale pink flowers that sit atop red stems. Its compact size makes it suitable for rock gardens or sunny borders.

Garden Phlox (Phlox paniculata 'Tracy's Treasure')
‘Tracy’s Treasure’ garden Phlox is most notable for its later blooming period, which can be up to a month after other popular garden phlox cultivars. Attractive to butterflies, ‘Tracy’s Treasure’ lacks strong powdery mildew resistance.

Pink Turtlehead (Chelone lyonii)
Typically growing to heights of two to three feet, pink turtlehead will grow best in light shade and bloom in the late summer to early fall. Native to Eastern United States, this plant will attract butterflies and hummingbirds with its vibrant pink blooms.

Showy Stonecrop (Hylotelephium spectabile 'Neon')
Providing bloom interest in late summer through fall, the ‘Neon’ cultivar of stonecrop produces neon pink flowers. Drought tolerant, this perennial not only attracts butterflies, but also works well in a rock garden setting or along the border of a sunny garden.

Red-stemmed Aster (Symphyotrichum puniceum)
The red-stemmed Aster is a Minnesota native perennial that blooms in late summer through early fall.  In its native habitat, it can most commonly be found where the soil is moist such as in a bog, swamp, or in wet meadows.  The flowers are purple and butterflies find the plant attractive.

Annual Garden (Assorted plants)
You know that the summer solstice has passed when the Annual Garden at the University of Minnesota Landscape Arboretum is bursting with color. This year, the annual garden is a literal rainbow with flowers ranging all the way from the cool end of the color spectrum to the warm end.

Stiff Goldenrod (Solidago rigida)
Blooming from late August through September, this native perennial produces tiny gold flowers on stiff stems. Due to its aggressive nature, this plant is best suited for naturalistic plantings as it will readily seed in. The spent flowers can be removed to promote reblooming.

Updated September 14, 2021

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