One of the best things about May is seasonal, UK-grown asparagus. One of the worst things is the price - but not if you grow your own. Asparagus plants and crowns are easy to grow in a sunny border or even pots. Rich in folic acid and vitamins A, B6, C and K, asparagus is delicious lightly grilled with hollandaise, baked, barbecued or even eaten raw in salads. And with plants lasting up to twenty years, it's not a bad investment!