You may already be keeping bees. You just don’t know it.⁠ ⁠ North America is home to more than 4,000 species of bees — and some of them may be nesting in your garden right now. Tiny Ceratina bees tuck themselves into hollow stems. Sweat bees may nest in bare patches of soil. Leafcutter bees use small holes and crevices, lining their nests with those suspiciously perfect circles you sometimes find cut from leaves.⁠ ⁠ In other words, a garden can be a bee hotel without ever installing a bee hotel.⁠ ⁠ And that raises an interesting question. If the bees are already here, do we need to buy more?⁠ ⁠ As concern for pollinators has grown, so has the market for mail-order mason bees and other managed species. Researchers caution that moving bees around can also move pathogens and parasites, introduce nonnative species, and create competition with local pollinators.⁠ ⁠ A better place to start may be with the bees that have already found you.⁠ ⁠ Grow native plants. Leave some dried stems standin...