In 1920 a florist, Joe Dobson, of Leighton's Seedsmen and Florists in Glasgow, and a nurseryman, Carl Englemann in Saffron Walden, Essex were looking to increase their business. They knew of the Florists Telegraph Delivery Association (now known as Florists' Transworld Delivery) which had existed in the US since 1910, and applied to join as foreign members. In 1923 the UK arm of the FTDA was formed with 17 members. One of the straplines used in advertising was Flowers by Wire when the telegraph was actually used to communicate between florists. Later, telegrams were sent from member to member requesting deliveries to be made in the recipient florists area. In the original Interflora Directory, used by members, the longest established members could be recognised by their telegraphic addresses. This would be the only telegraphic address in that city to include the name Interflora. In the case of the founding members, their telegraphic addresses were "Interflora Glasgow" and "Interflora Saffron Walden", respectively.
In 1953 the name changed to Interflora and the slogan Flowers Worldwide along with the Mercury Man roundel became well known. Say it with Flowers became the subsequent and most famous slogan associated with Interflora.
When telegrams became obsolete the most used method for requesting deliveries was by telephone. Following that Interflora brought in messenger1 in the mid to late 1980s, this system was very similar to sending a fax. In the late 1990s messenger2 was introduced, that used the internet to transmit orders.
In the early 2000s, Interflora brought out a system called Rose, this used the internet but instead of a dial-up connection a broadband connection was used. This enabled orders to be transmitted in real time. In 2011 Rose was updated to ROSEGold which provides a real time service between the call centre in Sleaford, Lincolnshire and the Interflora members around the United Kingdom.
In 2008, United Online Software Development acquired Interflora and FTD.
In 2012, Interflora bought the Gifts Division of Flying Brands.
In 2014 Interflora agreed a partnership deal with ITV's primetime show, Surprise Surprise! Surprise, Surprise is presented by Holly Willoughby. The deal saw the launch of the 'Surprise Someone Special' campaign which is fronted by Mark Wright (TV personality).
- Interflora agrees to 3i takeover BBC News Retrieved 23 January 2005
- FTD Group, Inc. Announces Agreement to Purchase Interflora Holdings Limited Business Wire Retrieved 7 July 2015
- "Interflora - Welcome To Our Blog - Interflora". Interflora.
- "FTD Spinoff from United Online Complete". Yahoo! Finance. Retrieved February 3, 2014.
- Interflora agrees partnership deal with ITV's next series of Surprise Surprise The Drum Retrieved 21 September 2014
- "Teleflora acquires Interflora UK from FTD". The Florist Magazine. Retrieved 2019-07-01.
- Lewis, Geoffrey (1986). The Interflora Story. Interflora British Unit Ltd, Sleaford, UK.