Plant Evaluation Notes

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Episodes

Date Title & Description Contributors
2014-03-19

  A Comparative Study of Joe-Pye Weeds and Their Relatives

Over a 12-year period, the Chicago Botanic Garden evaluated 26 taxa of Eutrochium species and related genera with the goal of identifying outstanding Joe-Pye weeds for Upper Midwestern gardens.
  Chicago Botanic Garden author
2013-02-21

  A Comparative Study of Cultivated Asters

Over our 6-year trial, seven asters received five-star excellent ratings for their overall performance. Top-rated asters displayed consistently strong habits, superior flower production, excellent disease resistance, and full winter hardiness throughou...
  Chicago Botanic Garden author
2011-10-13

  A Comparative Study of Phlox paniculata Cultivars

From 2001 through 2009, the Chicago Botanic Garden (USDA Hardiness Zone 5b, AHS Plant Heat Zone 5) evaluated 78 Phlox taxa in full-sun trials. Download the results in this PDF.
  Chicago Botanic Garden author
2010-12-09

  A Comparative Study of Tradescantia Cultivars

Spiderworts may be pegged as common garden plants, but their unique flowers and strong habits mark them as uncommonly good garden plants. A kaleidoscopic palette of colors marks the ephemeral blossoms of Tradescantia cultivars. Just over half of the sp...
  Chicago Botanic Garden author
2010-06-07

  Comparative Studies of Veronica and Veronicastrum

Throughout spring and summer the spiky flowers of Veronica rise like sentinels in the sunny garden. Speedwells can be long-lived provided that garden soils drain freely, which is especially important during winter months. A midsummer shearing after the...
  Chicago Botanic Garden author
2010-06-07

  A Comparative Study of Platycodon grandiflorus Cultivars

Balloonflower is a bushy, clump-forming perennial, up to 3 feet tall, with winsome buds and exuberant blossoms in midsummer. In the border or cottage garden, balloonflowers are good companions to other summer-blooming perennials and are long-lived unde...
  Chicago Botanic Garden author
2010-06-07

  A Performance Appraisal of Hardy Bellflowers

The distinctive blossoms of bellflower (Campanula) come in hues of blue and violet, from the deepest purple to softest gray blue. Grown in full sun or light shade, bellflowers are generally easy to grow and trouble free in well-drained, alkaline soils.
  Chicago Botanic Garden author
2010-06-07

  A Report on Leucanthemum xsuperbum and Related Daisies

Many new cultivars have renewed excitement in the Shasta daisy, including cultivars with frilly double flowers or thin curly petals. Plant in rich, well-drained soil: Shasta daisy is often considered a shortlived perennial, especially when grown in hea...
  Chicago Botanic Garden author
2010-06-07

  A Comparative Study of Cultivated Catmints

Equally wonderful as accents or massed in large groups, catmints are well-suited to perennial borders, herb gardens and rockeries, and can be used as ground covers, edging plants or for spilling over rock walls. True catnip, Nepeta cataria, is particul...
  Chicago Botanic Garden author
2010-06-07

  An Evaluation Report of Meadow Rues

The wealth of meadow rues available to gardeners ensures a profusion of pretty blooms from spring into fall. These easy-to-grow plants generally prefer moist, organic soils in partial shade to full sun. Plants that become ragged after flowering can be ...
  Chicago Botanic Garden author