The new restaurant is designed to create "a calm and tranquil environment and includes individual counters to minimise queuing as well as a variety of different seating areas to suit individual needs".
The new restaurant has capacity for up to 270 people.
The home, gift and seasonal departments has also been redesigned with new flooring, lighting and an improved product layout. Other features include new toilets with unisex baby changing facilities.
Staines manager Matt Ellis said: "The redevelopment plans for Staines are incredibly exciting and we hope will provide an enjoyable and inspirational experience for our customers. We’re looking forward to welcoming our customers into the new, modern restaurant which will be a fantastic addition to the centre."
The second phase, which is due to be completed in Spring 2017, will see the remaining canopy enclosed to complete the expansion of the indoor plant and retail area.
A new outdoor eating area will overlook a new ‘inspiration garden’ which will provide customers with creative ideas for their own gardening projects. For families visiting the centre, the existing children’s play area is being relocated near to the outdoor eating area.The Staines refurbishment project is part of Notcutts’ £45m five-year plan to redevelop its 18 centres across the UK. The Notcutts garden centre in Staines employs 76 people.