The RNGR Support Act of 2024 directs the U.S. Department of Agriculture to expand support for tree nurseries and seed orchards across the country. The bill establishes a grant program to help state forestry agencies, Indian Tribes, and private nurseries develop and expand their operations through funding for equipment, infrastructure improvements, workforce training, and seed collection efforts. The legislation also requires the Forest Service to collaborate with federal and state agencies, international partners, and private entities to improve reforestation practices and address climate change impacts on tree supply chains. The bill authorizes $25 million annually from 2025 through 2029 for the grant program, plus up to $5 million per year from the existing Reforestation Trust Fund, with the grant program required to launch within two years of enactment. These investments aim to increase the availability of high-quality native trees and plants needed for large-scale reforestation and forest restoration projects nationwide.