The online-based business offers seed-based gardening solutions, such as a flower, vegetable and herb gardens in a box and roll-out seed mats.
GroBox products are made from recycled materials and are themselves recyclable or break down once planted in the soil. The packaging of its products for children were designed by schoolchildren close to the company's current location in Hyde, Lancashire.
The company will relocate to Mr Fothergill's at Kentford.
GroBox's previous owner Jayne Lawton remains in a consultancy capacity.
Mr Fothergill's commercial director Tim Jeffries said "There is a synergy between GroBox and our core products, we like their green credentials and the brand will be a valuable addition to our online presence".