For the first time the show will be previewed at an exclusive exhibition at Royal Horticultural Society (RHS) Horticultural Halls, Westminster, on 16–17 February.
The Chelsea Preview, in the Lindley Hall, will include images and design sketches and items that have inspired gardens featuring in the world's most famous flower show this May.
Visitors will have the chance to meet and hear from designers including Hay Joung Hwang, Sarah Eberle and Juliet Sargeant through live Q&A sessions held throughout both days of the show.
RHS Chelsea show manager Tom Harfleet said the event was a "one-off opportunity" to see designs and sketches that would never usually be made available to the public.
The RHS London Early Spring Plant Fair is the first RHS Show of the year and features in both the Lindley and Lawrence Halls.
In addition to the Chelsea Preview, fresh winter colour and early-flowering plants will be on display from UK nurseries and growers selling plants and bulbs such as snowdrops and daffodils.
There will be a large potato display, RHS Advisors will be on hand to answer gardening queries, and in the Lawrence Hall a new "boutique" shopping experience will have books, tools, outdoor furniture, crafts, plants, gardening accessories and prints for sale.
The show offers a range of free activities for children and parents. The Southbank Printmakers Association will be teaching potato printing, the Secret Adventurer's Club will be running drop-in workshops on creating miniature gardens, and the Growing Communities Group will teach people how to sow vegetable seeds. NAFAS (National Association of Flower Arranging Societies) will also host workshops.
There will also be an exhibition of the photographic work from schoolchildren taking part in the RHS Young Photographer of the Year competition, as part of the Campaign for School Gardening.