The codes can be used on any kind of plant label and are available for over 7,500 plant varieties.
Joy of Plants supplies information and a photograph for each of the plants, which are plants suitable for gardens in the UK and Ireland.
Garden centres and nurseries can license the Joy of Plants Plant Finder to their websites and the same information is available through the Joy of Plants iPhone app.
Joy of Plants director Terri Jones said: "With our QR codes we are letting nurseries and garden centres offer access to high quality plant information from their labels, free of charge.
"They don’t have to worry about creating and delivering the plant information, all they have to do is add our 2cm square QR codes to their labels, and we do all the rest.
"We provide our QR codes as an educational tool to help gardeners learn about plants. We spent a lot of time talking to novice and experienced gardeners about what plant information they wanted and based our design on their needs."