Sean Nash

A solar farm in Minnesota planted native wildflowers between its panel rows. Five years later, total insect populations tripled. Native bees increased 20-fold. Not only did insect populations boom, soybean fields next to the solar arrays got twice as many bee visits as fields farther away. Two of the things we usually think of as competing turned out to reinforce each other. One study, published in Environmental Research Letters in late 2024, tracked two utility-scale solar sites built on retired farmland in southern Minnesota, where the developer seeded native prairie species between rows of panels in 2018. By 2022, the sites looked less like industrial energy infrastructure and more like remnant prairie. Goldenrod soldier beetles colonized the goldenrod stands. Bumblebees nested in the soil. Monarch butterflies passed through during migration. The wildflower diversity grew sevenfold; insect diversity grew eightfold. This matters because, like it or not, utility-scale solar is going to take up real space. The US is on track to cover roughly six million acres in panels by 2050. The default approach is turfgrass, gravel, or herbicide-maintained bare ground, which is ecologically dead. The Argonne study shows the alternative isn't more expensive or harder to maintain. It's just a different seed mix.