Some tips for finding free trees to plant include learning which trees grow well in the area, asking local nurseries for unsold trees they are planning to throw out, applying to the National Wildlife Foundation for free native tree seedlings and posting requests on Freecycle.org and Craigslist.org. Joining the Arbor Day Foundation costs $10, but members can opt to receive 10 free trees just for joining, as of 2015.
Finding out beforehand which trees do well in an area helps determine which trees to request. Walking around an area to see which trees are there and asking local nurseries or landscaping firms are ways to obtain this information. The nurseries and landscaping companies may also have free trees that would otherwise go to waste.
The National Wildlife Foundation has a program, Trees for Life, that gives free trees to adults planning educational events to teach children about planting and caring for trees and their importance. These trees are for planting in community areas rather than on private property. However, local organizations such as TreePhilly, which is part of Philadelphia Parks & Recreation, have yard tree giveaway events.
Freecycle.org or Craigslist.org may have posts offering free trees, and people can post requests for them. Relevant parts of the "for sale" section of craigslist.org are "barter," "free" and "farm+garden."