bulbs in lawns; weeds
Diane Whitehead (Wed, 01 Sep 2004 21:47:20 PDT)

Michigan State University has had a weed seed germination experiment
going on since 1879. Bottles with a mix of weed seeds were buried
and are dug up on a regular basis to see which seeds will germinate.
The latest bottle produced only Moth Mullein, Verbascum blattaria,
from 120 year old seed.

http://newsbulletin.msu.edu/july27/beal.html Five of the original 20
bottles remain buried, and the next one to be dug up and tested will
be in 2020.

Diane Whitehead