A new study from Northwestern University indicates that gardeners can effectively support pollinator populations by incorporating cultivated flowers into their landscapes. This research challenges the long-held notion that only native plants are beneficial for pollinators, proposing a more balanced approach.

The findings, published in the journal Ecosphere, suggest that a mix of both cultivated and native species can create attractive and ecologically sound gardens. This perspective offers practical guidance for gardeners aiming to enhance biodiversity while maintaining aesthetic appeal.

Rethinking Pollinator Gardens

The concept of pollinator gardens gained traction in the mid-2000s due to concerns over declining bee and butterfly populations. Historically, these gardens have prioritized native plants, which have evolved over time to attract local pollinators.

However, the Northwestern study investigated the pollinator-attracting capabilities of cultivated varieties, which are often bred for human aesthetic preferences. The research aimed to determine if these popular garden plants could also serve as valuable resources for pollinators.

Promising Cultivated Varieties

The study found that certain cultivated plants performed remarkably well in attracting pollinators. For instance, the black-eyed Susan cultivar 'Goldsturm' and the foxglove beardtongue cultivar 'Husker Red' demonstrated pollinator attraction rates comparable to their wild counterparts.

These results suggest that visually appealing cultivated flowers can be integrated into gardens without sacrificing their ability to support bees, butterflies, and other vital insects. This offers a more accessible approach for gardeners who desire both beauty and ecological function.

Variability and Selection

Conversely, the research also identified cultivated varieties that were less effective at attracting pollinators. Plants like R. fulgida 'American Gold Rush' and P. digitalis 'Blackbeard' did not show the same level of pollinator engagement.

This highlights the importance of careful selection within cultivated plant groups. Gardeners are encouraged to choose specific cultivars known to be beneficial for pollinators, complementing their native plant choices.

A Harmonious Approach

Nicholas Dorian, the lead author from the Chicago Botanic Garden, stated that the findings prove environmental responsibility and aesthetic beauty can coexist. The study advocates for a thoughtfully planned garden that includes a mix of both cultivated and native plants.

This balanced strategy provides a practical solution for gardeners who may be hesitant to adopt a purely wild garden aesthetic. It offers a less daunting entry point for individuals looking to contribute to pollinator conservation.

Research Methodology

The study involved a two-year controlled experiment. Researchers planted native and 13 cultivated species and meticulously observed insect visitation rates.

They counted various pollinators, including bumblebees, honeybees, butterflies, moths, and beetles, visiting the flowers' reproductive structures. Observations were made in controlled plots and diverse community settings, including backyards and public areas, ensuring the study's real-world applicability.