Red Wiggler Care Farm has a great service hours program for high schoolers (and companies). It's a vegetable farm that employs neurodiverse adults of all abilities. Half of the produce is donated to combat local food insecurity.

https://redwiggler.org/volunteer/

Look at this site. They have a section on MD and VA.
https://dcurbangardenernetwork.wordpress.com/

Wondering if anyone knows about a community garden that needs volunteers in Montgomery County, MD? Would they take HS students as volunteers? Thanks !