Mr Fothergill's give away a Free Trial Pack of seeds with seed order in the same way as D.T.Bowns do.
So having got this pack of seeds I kinda wanted to see what this particular variety of lettuce looked like. The pack gives a description of "Large, productive heads of mint-green leaves with a crispy texture and a sweet flavour. This Heirloom `Romaine Cos' variety is still popular today for reliable crops over a long season"
And as D.T.Browns free trial pack of seeds they place an item code number on the bottom of the pack. This is the code that will be used in the following year when the seed goes from trial to being able to be purchased from the company.
Kings Seeds are selling this variety this year and it's NEW TO KINGS because it's a heritage that they may or may not have sold before. Lots of new varieties are only new to seed providers because they have not sold them before or are re introducing. Some seed providers develop and have exclusive versions before they start selling the seed stock more widely.