pesticide free potting soil

[Kay Lancaster]

How about using acid-washed sand and defined nutrient solutions?  Would that
work?

I'd consider even "organic" potting soils possibly contaminated with
pesticides.

What's the purpose of the exercise?


On 19 Apr 2004 20:06:09 +0100, "Fisher, Roxanne" <RFisher at Chatham.edu> wrote:
> 
> Dear Plant-ed folks:
> 
> I have some colleagues in chemistry that want to grow some carrots and
> potatoes in a pesticide free environment.  Do you know if there are any
> potting soils that are pesticide free?  I thought of mixing up our own
> from vermiculite, perlite and peat moss but then there's question about
> the exposure of the peat moss to pesticide.  They can test the soil
> themselves, but it would save some time and effort if  pesticide free
> potting soil is available.
> 
> Thanks!
> 
> Roxanne
> ***********************************************************************
> Roxanne H. Fisher
> Assistant Professor of Biology
> Buhl Hall
> Chatham College
> Woodland Road
> Pittsburgh, PA 15232
> Phone: 412.365.1893
> Fax 412.365-1505
> email: rfisher at chatham.edu
> ***********************************************************************
> 
> 
> ---