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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Winter Seed Heads For Finches And Garden Birds

A perennial garden can continue feeding birds after the last flowers fade. Upright stems, dry cones and papery seed clusters provide natural forage through the cooler months, while also giving shelter to insects and small birds. American goldfinches are famous for clinging to seed heads, but Australian gardeners should also consider local finches, parrots and other seed-eating species.

The best planting choices depend on climate, soil and rainfall. Findings from the Perennials in Focus program are especially useful for understanding plant performance in cold, clay-heavy regions such as Chicagoland, while gardeners in Sydney, Melbourne, Brisbane, Adelaide or Perth need to translate those observations to local conditions.

Why Seed Heads Matter In Winter

Many birds need reliable food when insects are less abundant and flowering plants have slowed down. Echinacea cones, rudbeckia centres, grass seed panicles and the dried heads of yarrow can hold edible seeds well into winter. Leaving these structures standing also creates perches where birds can feed safely and watch for predators.

Seed heads bring value beyond food. Hollow stems can shelter insects, and dense clumps give small birds cover from wind and cats. A garden with several plant shapes is more useful than one filled with identical flowering varieties. Combine tall stems, fine grasses and low foliage so birds can move through the planting rather than gather in an exposed open bed.

Reading The Goldfinch Idea In Australia

American goldfinches are native to North America and are not the usual target species for an Australian garden. Their feeding behaviour is still a helpful model: they favour accessible, mature seed heads and often visit plants that retain seeds above the foliage. In Australia, similar planting can support red-browed finches, double-barred finches, spotted pardalotes, parrots and other local visitors, depending on the region.

Avoid assuming that an exotic plant will benefit every Australian bird. Local species have different beak sizes, feeding habits and habitat preferences. A Melbourne garden may attract small grassland birds with native grasses, while a Brisbane yard may be more successful with layered subtropical planting. In dry Adelaide or Perth conditions, drought-tolerant species and careful water use become central to the design.

Perennials With Useful Seed Structures

Coneflowers, including Echinacea purpurea, are among the most recognisable choices for winter seed heads. Their sturdy brown cones remain upright after pink or white petals drop, offering a visible food source and winter texture. Rudbeckia provides a similar effect with dark central discs, while yarrow produces flattened seed clusters that catch frost and light in cooler districts.

Liatris, penstemon and perennial asters can extend the seasonal sequence, although their performance varies across Australia. In cold areas, they may provide valuable late-season structure. In warmer regions, they may require afternoon shade, improved drainage or a position protected from humid summer weather. Do not cut every stem at the first sign of dormancy; retain the strongest plants until birds have finished using them.

Native Grasses And Australian Alternatives

Native grasses can make a seed garden more relevant to local wildlife. Kangaroo grass, wallaby grasses and selected Poa species offer fine foliage, flowering stems and seed-bearing panicles, with forms suited to different parts of the country. Lomandra is widely available and handles tough conditions, though its seed value varies between cultivars and it is often grown primarily for shelter and structure.

For a colourful perennial layer, consider everlasting daisies, billy buttons and other Australian daisies suited to the local climate. Their dried flower heads can persist for months and provide nesting material or insect habitat, even when birds do not eat the seed directly. Buy plants from reputable nurseries and check mature size, water needs and weed potential before planting.

Designing A Long Feeding Season

A useful bird garden does not depend on a single autumn crop. Combine early, middle and late seed producers so food remains available across several months. Cool-climate gardeners might pair spring grasses with summer coneflowers and autumn asters. In warmer districts, native grasses, everlasting daisies and locally adapted flowering perennials can create a longer sequence.

Plant in groups rather than scattering single specimens through lawn. Three or five plants of one kind create a stronger feeding patch and make it easier for birds to locate food. Leave a few open spaces at ground level for fallen seed, but avoid bare soil that becomes dusty or compacted. A shallow bird bath placed away from dense shrubs can provide water while reducing ambush points for cats.

Soil, Mulch And Winter Survival

Healthy roots determine whether a perennial returns strongly enough to flower and set seed. Australian soils range from heavy clay in parts of Melbourne and Canberra to sandy soils around Perth and nutrient-poor sites near coastal cities. Compost, aged organic matter and measured irrigation can help, but excessive soil amendment may harm plants adapted to lean conditions.

Research from colder clay regions also offers useful lessons about protecting crowns and managing moisture. The mulch survival findings from Perennials in Focus can help gardeners think carefully about mulch depth, drainage and winter wet. Use coarse mulch around, rather than over, the crown, and allow air movement through the planting to reduce rot.

Practical Maintenance For Bird-Friendly Beds

Delay hard pruning until late winter or early spring, particularly where stems are still carrying seed. Cut only damaged or collapsing growth, leaving strong stalks and cones in place. In fire-prone parts of Australia, this approach must be balanced with local bushfire regulations, defensible-space requirements and the need to keep vegetation away from buildings. A tidy edge and clear access path can make a wildlife planting safer without removing every useful stem.

Avoid pesticides that eliminate insects birds may eat, and do not use treated seed in areas where wildlife forages. State and territory laws protect native animals, and collecting plants or seed from reserves, roadsides or public bushland may be prohibited. If the garden is part of a community verge or shared courtyard, practical records such as shared garden access can support clear maintenance arrangements and reduce accidental disturbance.

Choosing Plants From The Local Market

Australian nurseries increasingly stock wildlife-friendly perennials, native grasses and waterwise plants, but availability differs by city and season. Ask for plants proven in your rainfall zone rather than relying only on attractive labels. A variety that performs in a Canberra trial may struggle in humid Brisbane, while a plant celebrated for Perth’s sandy soils may decline in wet winter clay.

Look for healthy, well-rooted specimens without signs of dieback, and check whether a plant is listed as invasive or restricted in your state. Local provenance can be valuable for native species, especially where the garden connects with nearby bushland or habitat corridors. In suburban Sydney and Melbourne, even a narrow side garden can contribute food and shelter when several compatible perennials are planted together.

Leave selected stems standing, observe which birds arrive and record flowering, seed retention and plant spread through the seasons. Those simple notes can help refine future purchases and provide useful evidence for local garden groups, nurseries and community planting projects. Build a small succession of seed-bearing plants, maintain clean water, and let the garden mature into a dependable winter resource for Australian birds.

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