Party chairman John Gormley strongly rejected criticism of his party. He said the Fianna Fáil and PD tactics were becoming clear.
"Sustained, uncontested, unsubstantiated attacks on the Greens are already becoming commonplace.
"You will notice that these attacks never occur when Greens are present in the studio. Like any bully, these people are also cowards and would not dare risk retaliation. Is it really asking too much that we would have the right of reply, or that these individuals would be asked to substantiate their dubious claims?"
He accused both parties of operating on the premise that if a lie was repeated often enough, some people might believe it.
"Mary Harney branded us as 'crazy', and not a single commentator asked her what she meant. Many of us will find these accusations highly ironic. The reason that I am in the Green Party, and the reason many of you are in the Green Party is because it is the most sensible and sanest party in this country... Green politics adds up. It makes sense. It fits perfectly."
Mr Gormley said he would define "crazy" for delegates.
"When you have hundreds of patients lying on hospital trolleys in one of the wealthiest countries in Europe, that is crazy. When you have a Minister for Health who presides over a mess, and then promises a world-class health system, that is crazy and delusional.
"And when you have patients being illegally charged for long-stay care in nursing homes, and nobody but nobody takes political responsibility, that is crazy.
"It is like the captain of the Titanic complaining afterwards that nobody told him about the iceberg, and, therefore, that he was not responsible."
He said the Green Party supported immediate pay increases for nurses, and saluted their "tireless commitment" on behalf of patients throughout the State.
Mr Gormley said last year the party's German colleague, Reinhard Butikofer, had said that the party could best prepare for government by setting out a series of realistic and attainable policy goals. "We are in the process of doing that, and as many of you will know it has become since known as the Butikofer project.
"In the area of health reform, we have published a series of documents dealing with the accident and emergency crisis, and, most importantly, with primary care."
He said the Green Party was the first party to publish a position paper on obesity.
"Every second person in this country is overweight, one in eight is obese, and the number of obese people is doubling every year. Ninety per cent of people who have type-two diabetes,which is increasing all the time, are obese."
He added that the Government's response had been to launch a new organisation, the Health and Nutrition Foundation, whose sponsors were a number of prominent companies.
His party's aim was to reduce the incidence of diabetes by 15 per cent; the incidence of depression and suicide by 20 per cent; and childhood obesity by 25 per cent.
"We will deal with the problem of MRSA in our hospitals by setting out the most rigorous of cleanliness standards, and we will ensure that the food served in our hospitals is food which is good and nutritious and of the highest quality."
Mr Gormley said the party would also deal with the problem of alcohol abuse.
"The link between alcohol and suicide became very apparent during our debate last week in the Dáil on suicide in Ireland."