Licensing Agreement

Plant Health Care PLC
19 September 2005


Embargoed until 7am                                         19 September 2005


                              Plant Health Care plc
                                        
                                License Agreement

Plant Health Care ('PHC' or the 'Group') is pleased to announce that it has
entered into a licensing agreement with Eden Bioscience for the use of Eden's
next generation Harpin technology. Harpins are proteins that elicit a growth
response when applied to plants. Under the terms of the agreement PHC will have
exclusive rights for a minimum of 5 years (subject to minimum purchase
requirements) to use Harpin technology in nutritional products in the UK, the
Netherlands and Scandinavia, and non-exclusive rights to sell those products in
Northern Africa and Italy. PHC has the right to test these products in Mexico
and the US to determine their market potential.

PHC has developed a product trademarked Pre-Tect which combines Harpin with
some of PHC's proprietary natural based technologies. In trials, Pre-Tect has
been shown to consistently increase the yield and the shelf life of leaf crops,
such as lettuce, spinach and broccoli, for 2 to 5 days.

The Group is currently in discussions with certain supermarket chains in the UK
concerning the possibility of Pre-Tect being used by their growers and suppliers
in order to reduce their product wastage.

John Brady, CEO of Plant Health Care, said, 'The incorporation of Eden's next
generation Harpin technology into PHC's product portfolio is a very exciting
addition for the Group. Our Pre-Tect product has consistently increased yield
and shelf life on leaf crops and by using Pre-Tect as one of their regular
cropping inputs grocers can address one of the most significant problems that
they face, namely the limited shelf life of fresh produce. PHC'S Pre-Tect will
allow the grocers to naturally add shelf life, limit losses due to spoilage and,
as a result, increase profits.

For further information please contact:

Plant Health Care plc
John Brady, CEO                                     Tel: [phone]

Eden Bioscience
Rhett Atkins, CEO                                   Tel: [phone]

Tavistock Communications                            Tel: [phone]
Jeremy Carey
Christian Taylor-Wilkinson


Notes to Editors:

About Plant Health Care
Plant Health Care plc ('PHC') is a leading provider of natural products for
plants and soil. Established in 1995 in Pittsburgh (Pennsylvania) in the United
States, PHC currently has approximately 60 employees and has operations in the
US, Mexico, UK, Spain, and the Netherlands with technical support in Austria.
The Group has two principal operating subsidiaries in the US - PHC Inc (PA) and
PHC-REC. The Company listed on the AIM market of the London Stock Exchange in
July 2004. Ticker symbol is phc.

PHC's products are aimed at the horticulture, agriculture, turf grass,
commercial landscaping, forestry and land reclamation industries and are both
environmentally beneficial and on the whole more cost effective than synthetic
chemical alternatives. Through the commercialisation of these products, PHC is
capitalising on current long-term trends toward natural systems and biological
products for plant care and soil and water management uses.

PHC-REC is an environmental and reclamation engineering consulting firm which
provides engineering and design services for reclamation lands disturbed by
mining, construction, and other activities. PHC-REC is the recognised leader in
the use of biologically based solutions using mycorrhizal fungi and bacteria for
the establishment of trees, shrubs, and grasses on these disturbed lands.
PHC-REC was established in 1997 to exploit PHC's products and technology.

Web Site: www.planthealthcare.com

About Eden Bioscience

Eden Bioscience was founded in 1994 and is located in Bothell, Washington USA.
The company is primarily engaged in the sales and marketing of its proprietary
Harpin technology. Eden's technology is based on a family of naturally occurring
proteins called 'harpins' and represents a unique type of crop production tool
Eden classifies as plant health regulators.

Web site: www.edenbio.com




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