Evaluating Perennials for Chicagoland Gardens

Perennials in Focus is a plant evaluation program that examines new and underused plants for Chicagoland, the third largest metropolitan area in the country. A group of horticultural experts trials and evaluates plants at numerous locations across the region. Results help consumers, public gardens, growers, landscape designers, breeders, and other industry professionals make informed plant choices.

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Red-Flowering Perennials for Hummingbird Gardens

Perennials that provide red flowers for hummingbird gardens, like Monarda didyma, are valued for more than colour. Their tubular blooms offer nectar and fit a layered feeding plan across a season. Scarlet bee balm is the classic benchmark, although soil, moisture and summer heat determine its reliability. Hummingbirds occur naturally in the Americas, so Australian gardeners should adapt the idea around local nectar-feeding birds. Learn more about Comparing The Winter Seed Heads Of Echinacea Versus Rudbeckia Overview.

Perennials in Focus is a collaborative plant evaluation program that trials selected new and underused perennials across multiple Chicagoland gardens and seasons. Gardeners and horticultural professionals record bloom period, flower colour, height and spread, creating region-specific evidence rather than relying on a plant’s catalogue description. That regional approach is useful when a perennial is being considered for a climate with broadly similar winter and summer patterns. Learn more about Perennials That Provide Nesting Material For Chickadees And Titmice In Winter Overview.

Red colour alone rarely creates a successful pollinator garden. Flower form, nectar availability, flowering length and the amount of open bloom all affect how useful a plant becomes. A sound scheme staggers early, middle and late flowers, places them within easy flight paths, and keeps pesticide use to a minimum. Shelter and water can matter as much as the floral display.

For Australian readers, hummingbird-style planting translates most closely to nectar gardens for honeyeaters, lorikeets and other native feeders. Melbourne’s cool winters and dry summers, Sydney’s humid summers and Brisbane’s subtropical conditions require very different plant choices. The plant market is broad, with garden centres, specialist native nurseries and online suppliers offering both familiar ornamentals and local alternatives.

Perennial or native option Typical flower and size Best garden role Important Australian check
Monarda didyma Scarlet tubular clusters; about 0.9–1.2 m Classic summer nectar display Needs cool winter and reliable moisture; check heat tolerance
Lonicera sempervirens Red tubular blooms on a twining perennial vine Fence or trellis for active nectar Needs room; check local weed rules and humidity
Penstemon barbatus Scarlet tubular flowers on upright spikes; often 0.5–0.9 m Sunny mixed border or dry edge Confirm cultivar persistence and local winter survival
Lobelia cardinalis Bright red flowers on stems around 0.6–1.2 m Moist border or pond edge Requires steady moisture and may flop in heat
Correa reflexa Red tubular bells on shrubs, roughly 0.5–1 m Native nectar source for honeyeaters A woody shrub, not a true perennial; choose a local form
Epacris impressa Slender tubular flowers, commonly red or pink Heath planting for native nectar birds Needs well-drained suitable soil; flowering differs among forms

Reading Regional Trial Evidence

Chicagoland trial results are most relevant to gardeners in comparable continental climates, especially those with cold winters and warm summers. They offer a useful starting point for judging habit and bloom sequence, but they cannot guarantee success in Australian soils. Melbourne and Hobart may share winter cold, yet rainfall patterns differ; a trial record should be checked against the receiving garden’s exposure and irrigation.

Plant labels can also blur the differences between a species, cultivar and trade-marked selection. A broad international research overview can help readers place overseas material in context, yet observed local performance remains the decisive evidence. Use trial records to narrow the shortlist, then confirm nursery-grown stock, expected size and regional persistence before buying.

Monarda didyma and Closely Matched Perennials

Monarda didyma usually produces upright stems around 0.9–1.2 m high, carrying clustered scarlet tubular flowers through summer. It prefers sun, moisture and humus-rich soil, and may decline in prolonged drought or fierce humid heat. In Australia it is most plausible in sheltered, regularly watered gardens where winter conditions allow dormancy; in a very small bed, a compact cultivar may be more manageable than the species.

Penstemon barbatus offers similar red tubes on vertical spikes and often suits a sunny, well-drained border. Lobelia cardinalis gives a stronger red display beside damp soil, while Lonicera sempervirens needs a fence or trellis and considerable room. These choices extend the nectar season, but their spread and winter habits differ. North American bird-garden experience adds another dimension: this winter nesting-material overview examines the value of stems and foliage to chickadees and titmice.

Native Australian Alternatives for Nectar Birds

Correa reflexa and its cultivars offer red tubular flowers on Australian shrubs that suit honeyeaters, particularly where space is limited to a metre or so. Native Epacris impressa and selected Epacris longiflora provide fine tubular flowers for a heath-style planting, with local forms available in red, pink and white. Their value comes from matching native feeding seasons and flower shapes to birds already present in the landscape.

These substitutes should be chosen as habitat, not treated as visual imitations. Grevillea species can extend the red display, but many are woody shrubs rather than perennials; label them accurately. Prefer plants sourced close to the intended region where possible, since local provenance can affect flowering and wildlife value. Leave some stems and litter undisturbed, and avoid pesticides that contaminate nectar or insect prey.

Matching Plants to Australian Conditions

Site matching begins with temperature and water. Melbourne benefits from plants that handle cool winters and summer dryness, Sydney needs tolerance of humidity and mildew, and Brisbane choices must cope with subtropical heat and seasonal dryness. Full sun improves flowering for most candidates, while Correas and Epacris can accept some shelter. Soil preparation matters: incorporate organic matter without creating a wet crown, and use mulch to conserve water without burying stems.

Australian buying habits influence what reaches these gardens. Many householders buy plants at weekend garden centres, while local nurseries and online suppliers increasingly offer native cultivars; labels that say “pollinator friendly” rarely promise year-round value. Check mature height, spread, flowering time and whether the plant is locally invasive. Importing live plants can require approval under the Commonwealth Biosecurity Act 2015 and applicable state or territory quarantine rules.

Extending Blooms and Winter Habitat

A red display lasts longer when no single species carries the whole season. Combine an early correa or grevillea with summer bee balm and autumn penstemon, then retain seed-bearing perennials for winter. A winter seed-head comparison explains the different structural roles of Echinacea and Rudbeckia heads. Leave selected stems standing where they will not obstruct paths, creating perches and feeding opportunities for native birds.

Deadheading can tidy a border, but total removal of every stem reduces habitat value. Leave a portion of foliage and seed heads through winter, then cut back before new growth becomes congested. In Australia, native seed heads may feed finches and insect-eating birds, while tunnels and bark retained nearby can support local invertebrates. The North American nesting findings are instructive, but local species and habitat requirements should guide the final mix.

Create a Pollinator-Focused Planting Plan

Begin with a site plan rather than a wish list. Mark sun, summer wind, irrigation, mature size and existing bloom dates, then choose one reliable red-flowering perennial for each period. Include several native nectar plants, keep a small proportion of untreated stems, and provide a shallow water source positioned away from predators. Record visits by honeyeaters or hummingbirds where relevant, along with flowering length and plant vigour.

Buy healthy, accurately labelled stock from reputable local nurseries, prepare the soil, and plant at the spacing shown on the final label rather than the current pot size. Water deeply during establishment, remove weeds by hand and observe whether bloom is sustained through local heat. Share flowering records with a garden club, native plant society or regional trial group. Choose the first three plants now, then record what the garden actually delivers so each season becomes useful evidence for the next planting.

In the Garden

Evaluator gardens are located across the Chicagoland area, representing a range of growing conditions. Visit our retail and wholesale partners to find trialled perennials for your own garden.

Retail & Wholesale: Hinsdale Nurseries (Willowbrook, IL), Mariani Nurseries (Kenosha, WI & Garden Prairie, IL), Northwind Perennials (Burlington, WI), The Growing Place (Aurora, IL).

Wholesale Only: Hinsdale Nurseries (Plano, IL), Intrinsic Perennial Gardens (Hebron, IL).

Our Evaluation Program

The 2017–2020 evaluation cycle included Agastache 'Blue Boa', Allium senescens 'Blue Eddy', Amsonia ciliata var. filifolia 'Georgia Pancake', Astilbe 'Chocolate Shogun', Boltonia astroides 'James Crocket', Brunnera 'Alexander's Great', and Geranium cinereum 'Jolly Jewel Purple'. Completed evaluations include Amsonia 'Blue Ice' (2004–07).

On April 10, 2020, the program published snapshot profiles for Vernonia lettermanii 'Iron Butterfly', Stokesia laevis 'Elf', Stachys officinalis 'Pink Cotton Candy', Lobelia 'Monet Moment', Helleborus 'Winter Thrillers', Geum 'Mai Tai', Geranium soboliferum 'Butterfly Kisses', Gentiana x intermedia 'True Blue', Eurybia divaricata, Asparagus 'Purple Passion', and Agastache 'Bolero'.

Browse the full collection of snapshots organized alphabetically — from A–D, E–H, I–Q, and R–Z — to find detailed performance data on perennials trialled across Chicagoland.

Close-up of drooping orange and yellow spurred flowers with slender petals
Cluster of light purple daisy-like flowers with yellow centers
Tall spike of orange-yellow tubular foxglove flowers against blurred green
Cluster of small tubular orange-red flowers among green leaves