Successful Trial Results

Plant Health Care PLC
16 April 2007


                              Plant Health Care plc
                     ('Plant Health Care' or 'the Company')                     

        Successful trial results for Plant Health Care's unique technology

        - Harpin-based N-Hibit product successfully suppresses nematodes
            in soybeans and increases yields in cotton by up to 15% 

Plant Health Care (AIM: PHC.L), a leading provider of natural products for
plants and soil, is pleased to report the success of independent trials of its
Harpin-based N-Hibit seed treatments on cotton and soybean crops. This takes the
Company a further step toward commercialisation of this product in these and
other crops.

The trials, undertaken by Southern Illinois University, demonstrated that
N-Hibit reduced cyst nematodes in soybean roots by up to 60%, resulting in
average increases in yield of 8%. Approximately 150 million acres of soybeans
are planted each year in the US and Brazil alone. Similarly, when used in
combination with other treatments offered by the major agrichemical businesses,
the trials showed N-Hibit increased the yield of cotton by up to 15%.

Harpin is a fundamentally new and patented technology based on naturally
occurring proteins which activate internal plant growth and stress-defence
responses. Plant Health Care acquired the Harpin technology as a part of its
acquisition of the majority of the assets and business of Eden BioScience in
February this year (2007).

Plant Heath Care also announced today that it is in discussions with the world's
largest crop science companies regarding supply agreements for its Harpin
technology, and, further to its earlier agreement with Bayer CropScience, for
other uses of Myconate, its mycorrhizal stimulant.

John Brady, Chief Executive of Plant Health Care, commented: 'N-Hibit is the
only product currently available, natural or otherwise, which can suppress
nematodes economically in soybean crops.

'Overall these trial results fully endorse our expectations the Harpin
technology will be as important to Plant Health Care as Myconate.'


For further information:

Plant Heath Care plc                   Tavistock Communications              
John Brady, Chief Executive            Jeremy Carey/Simon Compton            
16 -17 April Tel: [phone]        Tel: [phone]                    
Thereafter: 001 603 525 3702                                                 



                      This information is provided by RNS
            The company news service from the London Stock Exchange