Both exports and imports declined for the second month running, according to data from Bank of Uganda.
This, according to the Central Bank, resulted from the global economic lockdowns that were necessitated by the need to reduce the spread of Covid-19.
Flower exports fell to $3.2m (Shs12b) from $5.4m (Shs20b) in the period.
Uganda exports much of its flowers to Europe, which has been under lockdown with auction markets operating below capacity.
Recently, Ms Esther Nekambi, the Uganda Flowers Export Association executive director, said they had registered a huge decline in both exports volumes and earnings.
“Our members reduced export volumes because most of the orders were cancelled. This is because the destination countries went into lockdown,” she said, noting many of the exporters had been exporting through agents whose supply capacity was mostly limited to supermarkets.