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The Chicago Botanic Garden Plant Evaluation Notes (PE Notes) are reviews of recommended plants for gardens in the Upper Midwest, as determined through scientific evaluation over a period of...
Over a 12-year period, the Chicago Botanic Garden evaluated 26 taxa of Eutrochium species and related genera with the goal of identifying ou...
Over our 6-year trial, seven asters received five-star excellent ratings for their overall performance. Top-rated asters displayed consisten...
From 2001 through 2009, the Chicago Botanic Garden (USDA Hardiness Zone 5b, AHS Plant Heat Zone 5) evaluated 78 Phlox taxa in full-sun trial...
Spiderworts may be pegged as common garden plants, but their unique flowers and strong habits mark them as uncommonly good garden plants. A...
Throughout spring and summer the spiky flowers of Veronica rise like sentinels in the sunny garden. Speedwells can be long-lived provided th...
Balloonflower is a bushy, clump-forming perennial, up to 3 feet tall, with winsome buds and exuberant blossoms in midsummer. In the border o...
The distinctive blossoms of bellflower (Campanula) come in hues of blue and violet, from the deepest purple to softest gray blue. Grown in f...
Many new cultivars have renewed excitement in the Shasta daisy, including cultivars with frilly double flowers or thin curly petals. Plant i...
Equally wonderful as accents or massed in large groups, catmints are well-suited to perennial borders, herb gardens and rockeries, and can b...
The wealth of meadow rues available to gardeners ensures a profusion of pretty blooms from spring into fall. These easy-to-grow plants gener...
Stachys' silvery leaves are perfect foils for plants with hot- or cool-colored blossoms. Conversely, betonies bring a casual formality to th...
Heavy-flowering Oenothera are healthy plants with winter hardiness, giving many of these taxa five-star excellent ratings. Sundrops and even...
One of the most attractive aspects of fall-blooming anemones is their extended bloom period. It is not uncommon for these plants to bloom co...
With few exceptions, Alchemilla prove to be good garden plants. The similarity of the cultivated species -- minor differences in leaves, flo...
Uneven moisture regimes can make the placement of plants in the shady garden an all-or-nothing experiment. In these circumstances, a variety...
Hardy geranium is a general term that is used to distinguish Geranium from its tender cousin Pelargonium, the colorful floral or bedding ger...
Few perennials have exploded onto the scene quite like coral bells, or Heuchera. Breeding has brought a variety of foliage shape and color a...
Barrenworts are tough, long-lived perennials that are an invaluable garden plant for the challenging environment of the Midwest -- their tou...
While many artemesias in the study proved unsuitable for northern climes, planting artemisias in lighter soils with sharp drainage may reduc...
Bluestars prove to be hardy, low-maintenance perennials, giving three seasons of interest in the garden. Clusters of pale blue flowers top t...
WIth neither serious nor consistent pest problems and a host of shade applications, Lungwort can brighten an area of your yard with a variet...
Some of the new cultivars of Tricyrtis have become available only in the last few years from specialty nurseries in Japan and the United Sta...
This 5-year study compared ornamental traits, disease and pest resistance, and cultural adaptability of 25 species and garden hybrids of sol...
Fifteen easy to grow and pest-resistant perennial Salvia taxa were grown and evaluated at the Chicago Botanic Garden from the 1993 to 1998,...
This 3-year comparative study of Phlox find that there are garden phlox that are beautiful in flower and form AND resistant to powdery milde...
Beebalms and bergamots are great perennials for meadows and wild gardens, along streams and ponds, in woodlands and also in the garden borde...
Modern shrub roses hold the promise of being better plants for today’s landscapes. But which shrub roses are best suited for the gardens of...
Of the 64 original clematis observed in this study, 33 are recommended for Northern landscapes, with nine taxa rated as superior for heavy f...
While many blazing stars can be successfully grown locally, not all species are suitable for growing in the Chicago area. This report detail...
With a diverse range of species that are easy to grow and well-adapted to a variety of cultural situations, coneflowers endure and provide f...
Fifty-five herbaceous summer flowering annuals tested this year (1994) included 16 All American Selections (AAS). All selections are rated o...
Of 30 species of Buxus cultivated in the Midwest, few boxwood varieties are hardy in colder, northern sites. Ten boxwoods were evaluated in...
While some Achillea in this study did not prove winter-hardy, a wide variety of hybrids had outstanding performance, including 10 cultivars...
Given minimal cultural care, rose mallow cultivars thrived in this evaluation. The range of flower colors, flower sizes, foliage types and h...
Bamboo can be grown successfully in the Chicago region and the Midwest, although size and coloration of bamboo canes isn't reliable in colde...
Fox Valley(TM) River Birch, Betula nigra 'Little King', proves a promising as a specimen plant, hedge, or in a shrub border. It's exfoliatin...
Rhododendrons can be grown with success in the Midwest. The top five performers of this five year study of small-leaved evergreen rhododendr...