In much of the United States, summer droughts are expected to become more frequent and intense, and longer in duration due to climate change. Soil moisture deficits will cause declines in tree vigor and loss of forest growth, resulting in degraded wildlife habitat, reduced carbon uptake, and loss of forest productivity. Researchers with the Forest Service, the U.S. Geological Survey, and the universities of Minnesota and Maine have implemented an experiment on Forest Service experimental forests to examine forest growth response to past droughts as influenced by different levels of tree stocking (basal area) and regeneration methods. The study capitalizes on the Forest Service's research infrastructure on experimental forests, which maintains long-term silvicultural experiments with different stand structures that are 50 years old or older, across several past drought events in a wide range of forest types. Results show that stocking levels can minimize growth losses during and after drought in a range of forests, including red pine, ponderosa pine, and northern hardwoods. This project is extensive in scope and scale and is helping managers understand how to adapt forests to a changing climate so the effects of drought are minimized and ecosystem goods and services continue.