Bordon Hill Nurseries' operating profit was at £222,000, up from £110,000 and operating margin at 2.9 per cent, up from 1.5 per cent.
Company secretary Peter Byrne said: "It has been a strong year for the ornamentals industry helped by increased consumer confidence and favourable weather. Our sales have increased by four per cent and this has been driven by diversification from our core seed-raised plug products. Perennials in particular are an area of strong growth.
"Although we have experienced increases in the cost of labour, we have made some good savings on the purchase of raw materials and in particular have benefitted from reducing fuel prices.
"We expect sales growth to continue next year due to a stable market and by keeping our focus on quality and reliability. We are installing a biomass boiler which will give us further savings on energy costs. The directors continue to look forward with optimism."
Meanwhile, Hill Bros (Chichester) for the year to 31 December 2015, saw turnover rise to £11.56m from £9.72m and profits up to £701,000 from £375,000. One of Hill's directors is BPOA chairman Greg Hill.
Customers were the same direct accounts to UK multiples.
Director Peter Hill said: "Flowering houseplants sales are steady with growth in some areas and the outdoor market saw an improvement with multiple retailers putting greater emphasis onto this side of the market.
"This year’s results show the business is in a good position to to embrace the next round of investments needed to ensure the facilities are fit for the future.
"Hill Brothers have continued to develop stronger ties with its contract growers both locally and abroad and these relationships hold the company in good stead to expand its traded product range.
"The commercial environment remains extremely competitive, 2015 saw continued improvement in the economic climate with exchange rates continuing to improve. There are still many challenges ahead for UK multiples market which is increasingly competitive, which continues to put pressure on costprices, We have pushed to deliver improved value over our competitors which we hope to continue in order to maintain current performance levels."