If you are hoping to get more experience to develop your career in horticulture, do look at the Professional Gardeners' Guild traineeship scheme here - closing date for applications is the end of April.
If you want to know more about the PGG - they offer help and support, and a chance to network with other people working in large private or public gardens - have a look at their membership video .
You don't need five years' experience to join as an Associate or Student member...