Tickets are on sale now for the event, held at The Roof Gardens, Kensington, on 15 January and described as "the hottest ticket in town" by the charity which provided more than £1.4 million worth of direct financial help to horticulturists last year.
The charity is inviting top industry figures but most of all expects it will be a fun gathering of the talents from across horticulture's varied sectors.
Perennial director of marketing and development Anita Bates said: "We had a brilliant response from the horticultural community to our 175th birthday party in January this year, and the feedback from everyone who came suggested that an annual event during one of the quieter times of the year would be a great way for everyone to come together and catch up with each other.
"The event also made it clear just how much support there is for Perennial across the horticulture industry. We were asked if we were going to organise the event every January and the level of support for the idea made it clear an annual party would be welcomed."
Partygoers will enjoy live music, the chance to see the famous roof gardens, expertly managed by head gardener David Lewis, and meet its resident flamingos Bill, Ben, Splosh and Pecks in the company of friends, colleagues and top industry figures.
The money raised will support Perennial’s programme of long-term support to those working in the industry, which ranges from debt advice to helping with relationship breakdown mental health issues, bereavement, injury or illness. Last year more than 75 per cent of new cases are from those currently working in horticulture. Perennial’s Lironi Training Fund also plays a vital role in helping the horticulturists of the future.
The Party for Perennial is the first major fundraising event for Perennial after its 175th anniversary and resurrects and old tradition - The Annual Dinner - which the charity held in its early years but which was cancelled in 1915 because of the First World War and never reinstated.
Bates added: "We're proud that our 175th anniversary year has enabled us to reinstate a Perennial fundraising tradition from over 100 years ago. We hope the event will become an annual fixture in the horticulture trade calendar and that trade support for the only charity dedicated to helping all horticulturists continues to go from strength to strength."
The party starts at 7.30pm and tickets cost £45.