Picking
  fresh peas from your garden is always a treat. They are a good
  source of iron and an excellent source of vitamin C. Approximately
  5 seeds / gram.
  Hints:
  Plant seeds early in spring as soon as the soil can be prepared.
  Sow seeds 2-3 cm apart and 2 cm deep. Do not thin plants.
  For best results, harvest in early summer or fall when peas
  enlarge pods. A 6 metre row of plants will yield approximately
  5 kg of pods.