killer Metromix?

[ctimpte at bio.indiana.edu]

	We use Grace/Sierra MetroMix 360 for our Arabidopsis plantings. Within the
past month, plants from several of our plantings have failed to thrive. 
The seedlings barely grow 2-4 primary leaves and bolt, but are tiny and
very
stressed. I wonder if we received a bad batch of soil, possibly
contaminated
 with herbicides? Has anyone else recently had problems with Metro Mix?
     I am writing the company to inquire about the soil, and it would be
useful to know if others have had this problem too.
Thanks,
Candace