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> ***********************************************************************
>>> ---
