Florette is introducing a new variant to its biggest-selling salad line as well as adding two extensions to its Duo range.

It has rebranded its existing crispy salad as Classic Crispy and added a Sweet Crispy bag, which it estimates will add 20% in annual sales - or £6m - to Crispy’s current sales.

Consumer research had identified demand for a sweeter crispy product, said commercial director Sandy Sewell.

The development would satisfy existing Florette fans as well as attract “significant numbers” of new shoppers, said Sewell.

Florette is also adding Pea Shoot & Baby Leaf Red Pak Choi, and Pea Shoot & Red Butterhead products to its Duo range of paired leaf bags, launched last May. The range had delivered £1.1m in sales to date across Tesco, Asda and Sainsbury’s, £450,000 of which was incremental, said Florette.

The new look Crispy salads will roll out in April, rsp £1.74, and the new Duo lines launch in May, rsp £1.19.

They will be supported by Florette’s previously announced £5m 2012 campaign, which will include TV and national print advertising.