It is adding Pear & Apple and Pineapple & Grapefruit teas and will back them with a television campaign.
The ads, which break next week on terrestrial TV, will be the last by Leagas Delaney after it split with Twinings last week.
As with Twinings' current TV ads for its everyday tea, the campaign stars Stephen Fry, who is shown drinking a different flavour of green tea each day. The company aims to exploit the expanding green teas market, which has grown 25% in the past year, according to ACNielsen.
There is still no decision on a replacement for Leagas Delaney on Twinings' £4m ad business. It is not known whether Fry will be used in future advertising.
According to Tim Delaney, the agency's chairman, it parted with Twinings due to cultural differences.