When to earth up spuds

Broad beans

... have been asked and not answered.  Why earth up your spuds?  Because it will stop tubers near the surface from going green through exposure to light, it helps with weed control and it helps combat blight.  But you should only really earth up a couple of times, when they're about six inches high and leave an inch or maybe two of leaf showing through, then do it again when they're about six inches high ... then leave em be, and if you've got the spacing right the leaves of the plants will then form a dense forest which will protect the little tubers from light too!

I'd agree with noshed on the broad beans - a single row - also leek and taller brassica (sprouts, kale, broccoli) transplants.  You might also want to try lettuce with a view to having the area completely clear and available once you lift your spuds.

What are nematodes  :?:

A natural enemy of slugs / snails : http://en.wikipedia.org/wiki/Nematoda