The use of Polytunnels, heated greenhouses and the use of re selected seed as well as the newer F1 hybrid varieties have all certainly contributed towards having crops maturing earlier. The beauty of a Polytunnel is the fact that not only can you produce crops earlier in the year, you can also extend the growing year at the back end of the season.
Growing Parsnips
25th July 2007 I am often asked what is the best method of growing both long carrots and parsnips for the show