Pollinator garden in one season

Pollination is the oldest plant–animal relationship that produces food. Roughly 87% of flowering plants depend on animal pollinators. Roughly one in three bites of human food traces back to that relationship. A pollinator garden is the act of consciously hosting it. Read [[pollination]] as the substrate under everything that follows.

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*Pollinator* is a category, not a species. Bees do most of the work, but moths, butterflies, hoverflies, beetles, hummingbirds, and even some bats are pollinators in different contexts. Designing for one — usually honeybees — produces a thin garden. Designing for the category produces a layered, season-long, climate-resilient one.

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North America has roughly 4,000 native bee species. Most are solitary, ground-nesting, and dramatically more efficient pollinators than the imported European honeybee. A pollinator garden that supports only honeybees has missed the point. Bare ground for ground-nesters, hollow stems for cavity-nesters, native flowers for forage — these are the design moves.

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Solitary, gentle, dramatically more efficient at fruit-tree pollination than honeybees. A mason bee in a tube of paper or a hollow stem will produce orchard-quality fruit set on a residential scale. The simplest specific pollinator to host: drill some 5/16″ holes in a block of wood and put it on a south-facing wall.

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Bumble bees do something honeybees cannot: *buzz pollination*. They grip the anther of a flower and vibrate their flight muscles, shaking pollen out of flowers (tomato, blueberry, cranberry) that other bees cannot effectively work. Without bumble bees, large categories of food production simply do not happen. Plant tubular flowers — they are built for this body shape.

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*Asclepias tuberosa* and the rest of the milkweed genus are the only host plants for monarch caterpillars and a major nectar source for many butterflies and native bees. A pollinator garden without milkweeds is a pollinator garden missing its keystone. Plant several species; let some go to seed; tolerate the chewed leaves as evidence the plan is working.

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The monarch is the most-recognized butterfly in North America and an emblem of the pollinator-decline conversation. Its multi-generation migration spans Canada to central Mexico. Its caterpillars eat only milkweeds. The species' population has dropped roughly 90% in three decades. A residential garden with milkweeds is a stop on a continental journey.

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Hummingbirds are major pollinators of tubular red flowers in the Americas. They migrate thousands of miles annually and refuel at residential gardens along the route. Native cardinal flower, bee balm, columbine, salvia — these are not ornamentals; they are infrastructure for a continental migration.

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Pollinator populations are collapsing across most of the documented world: habitat loss, pesticide exposure, monoculture, disease, climate disruption. The drop in monarch numbers, the rusty-patched bumble bee on the endangered species list, the broad insect-biomass decline. A garden does not solve this. A million gardens, plus structural change, begins to.