Riverford Organic has seen a six-fold increase in pre-tax profits but warned that it was likely to be followed by a dip in fortunes.

The organic box scheme operator posted profits of £636,763 on turnover up 3.8% to £32.7m in its results filed at Companies House last week for 3 May 2009 to 1 May 2010.

The improved performance came "on the back of a pretty lousy prior year", said managing director Jack Slatter, alluding to the poor weather that had hit crops in the 2008/ 2009 financial year.

Margins had also been improved by a more favourable euro exchange rate for imported produce. Slatter predicted Riverford's sales would be up roughly 4%-5% in the current financial year. However, he said he expected pre-tax profits to be down on last year because the company had embarked on significant investment in marketing to potential franchisees and customers.