'Tree planting'--any suggestions of companies/non-profits that plant trees in honor of people?

Question

This year a friend of mine wants to give, as presents, 'tree plantings' to some of her clients. She wants to pay a company/non-profit/group for this service.

Does anyone have any suggestions about reputable companies that do this type of thing? Note, this would be a small purchase...not off-setting a whole company for example! Suggestions anyone?

Answer 1

The Arbor Day Foundation:  http://www.arborday.org/shopping/tictim/...

Answer 2

www.jnf.org

www.treesfortheholyland.com

www.treestoisrael.org