The budget for plants is whatever you want it to be. We can be creative to get the most out of tight budgets. 

A typical small garden bed can benefit from a budget around £200-£250

A typical medium sized garden bed can benefit from a budget of around £300-£400

A large bed can cost around £600-£800 to plant up well. However, this can be done more economically using younger/smaller plants that require a little more patience while they are allowed to grow.