The Ecological Service Most Gardens Could Support Better
Pollinator populations — bees, butterflies, moths, and the many other insects that transfer pollen between flowers — have declined significantly in North America and globally, driven by habitat loss, pesticide exposure, and the replacement of diverse flowering landscapes with monoculture lawn and agricultural fields. Residential gardens collectively represent a significant potential habitat network that can support pollinator populations when designed with their needs in mind.
The garden designed for pollinators isn’t a sacrifice of aesthetics for ecology — pollinator-supportive gardens are typically more interesting, more seasonally varied, and more visually dynamic than gardens planted primarily for their static appearance. The ecological goal and the design goal are more compatible than they might seem.
The Native Plant Foundation
Native flowering plants are the foundation of effective pollinator habitat because the relationship between native bees and native plants has co-evolved over thousands of years. Native bees (solitary bees, bumblebees, mason bees, and the hundreds of native species that aren’t honey bees) have evolved to forage on native flowers — the pollen nutrition, flower structure, and bloom timing are matched to the bees’ needs in ways that non-native plants often aren’t.
The most impactful native plants for pollinators vary by region — the native plant societies and cooperative extension services for each U.S. region provide specific regional guidance. The broadly applicable recommendation: choose plants from the goldenrod, aster, coneflower, sunflower, and milkweed families as pollinator-support anchors, and supplement with regional natives for the specific bee and butterfly species of your area.
Bloom Succession: Something for Every Season
A garden with blooms from early spring through late fall provides continuous food resources through the full pollinator season. The bloom sequence that most effectively supports pollinators: early spring bulbs and native ephemerals (which provide the first pollen and nectar when bees emerge from overwintering), spring perennials and shrubs (the main early-season food source), summer perennials (the longest flowering period), and fall flowers — particularly goldenrods and asters — that provide critical fuel for migrating and overwintering pollinators.
Many gardens are planted for peak summer display without intentional early spring and late fall resources. Adding at least one plant in each of these shoulder periods — a flowering native willow or serviceberry for early spring, a goldenrod cultivar and native asters for fall — creates the seasonal resource continuity that supports resident pollinator populations year-round.
Nesting Habitat: Beyond Just Food
Providing food resources without nesting habitat creates a restaurant without a neighborhood — pollinators visit but don’t establish a resident population. Most native bee species nest in the ground (70% of North American native bee species are ground-nesters) or in hollow stems and wood cavities (the remaining 30%). Both habitat types can be provided in residential gardens with modest intentional effort.
Ground-nesting habitat: a bare or sparsely vegetated south-facing slope or patch of ground with well-drained soil. Many ground-nesting bees require bare soil with no mulch — dense mulching of all garden beds eliminates ground-nesting habitat. Leaving unmulched patches in sunny locations supports ground-nesting bees. Stem and cavity nesting habitat: hollow-stemmed perennials (bee balm, rudbeckia, goldenrod) left standing through winter provide nesting tubes. Commercial bee houses installed in sunny, east-facing positions provide additional cavity nesting sites.
The Pesticide Impact and What to Do About It
Any pesticide application — including products marketed as ‘natural’ or ‘organic’ — can harm pollinators when applied during bloom periods or when plants treated with systemic pesticides are visited by foraging bees. Neonicotinoid insecticides (commonly used as systemic soil drenches on nursery plants) persist in plant tissue for weeks to months, meaning that plants treated at the nursery continue to expose pollinators long after purchase.
The practical pollinator-protective approach: avoid applying any pesticide to or near blooming plants; if treatment is necessary, apply in the early morning or evening when pollinators aren’t actively foraging; purchase plants from nurseries that certify they haven’t used neonicotinoid systemic pesticides; and ask about treatment history for any plant you’re buying specifically to support pollinators.