Turnover increased from £19.13m to £19.44m while operating profit rose to £746,000 compared to £532,000 from the previous year.
Newly released results from Hertfordshire-based Van Hage show the 1.6% increase in turnover and 0.61% in gross profit margin to 44.65%.
Director Chris Roberts said principal risks were climate change and global warming, which can be managed through product diversity.
Roberts also cited increased competition from multiple retailers "who are targeting certain areas of the company's product base", which Van Hage believes can be resisted.
Increased use of the internet provided "both a threat to traditional sales and an opportunity for the company to develop its own sales in those areas", he said.
Van Hage's owners said they expect activity to remain consistent with 2015/16 because of "uncertainty in the market from the macro-economy slowing growth plans".
Meanwhile, pots company Elho has opened its second ambassador store, at Van Hage's main Great Amwell store, complete with point of sale, planted up pots and lifestyle imagery.