The Potomac Valley Audubon Society is sponsoring a Natural History Workshop on the structural pruning of trees on Saturday, Mar. 25 from 10 a.m. to 2:30 p.m. at Cool Spring Preserve in Jefferson County.

The workshop will be led by Shawn Walker, a local certified arborist.

Space will be limited to 15 people and pre-registration will be required. To register and get directions go to the PVAS website at www.potomacaudubon.org. There will be a fee of $20 for PVAS members and $25 for nonmembers.

Most of the tools needed will be provided. Participants should wear sturdy closed-toes shoes and bring work gloves, eye protection and any pruning tools they may have. They should also bring drinking water and a bag lunch.

Its workshops are intended for people who are interested in learning about specific natural history topics in considerable depth but cannot commit to pursue the much more comprehensive natural history education available through PVAS’s Potomac Valley Master Naturalist Program, which can take a year or more to complete.

For more information go to www.potomacaudubon.org or contact Krista Hawley at adultprograms@potomacaudubon.org or 703-303-1026.