Roundstone Nurseries' sales rose slightly to £19.81m (£18.63m) and operating profit fell to £323,000 from £873,000 in the year to 31 December 2016.
The directors said the performance was "satisfactory in difficult trading conditions".
Sister companies New Place Nurseries, New Forest Plants and Young Plants also filed accounts.
Newey bought Roundstone in autumn 2014. He said sales at the £40m turnover group were up about 5% this year.