Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Pine Needles
Name: Emily
Location: N/A
Country: N/A
Date: N/A

What effect to the needles from pine trees, on the grounds around it?

Dear Emily,

In the undisturbed forest, contributes to the forest floor/organic layer of the soil.

Used as a mulch in landscaping but contributes to acidification of the soil.

Also please see the following:


Anthony R. Brach

Pine needles are acidic, which inhibits growth of some plants; see a basic ecology/forest ecology book for details.

J. Elliott

Click here to return to the Biology Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (, or at Argonne's Educational Programs

Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory