Sowing

One cannot sow too early, for if the seeds are to germinate and not rot, the soil must be warmed up to at least 12^oC, preferably 16^oC for un-disinfected seeds. Sow the beans 3-5 cm deep in mars-april, plant iutside after all risk of frost is gone. 

Spacing

Keep 10-15 cm between the plants and 30-50 cm between the rows! The rows can be closer together in beds, but be careful. Beans should grow in an airy manner. If the climate is damp it is better to choose a wider distance between the plants and the rows. The Bean spot disease, a common fungal disease, can easily hit the plants, especially if they grow to close together.
And these beans grow tall and climb away! 

Harvest

Pick off the pods often! Do not wait until they are too big, for then they grow more or less fibrous and get tough. The bean plant produces more pods as long as the old ones are picked. The beans can be frozen after parboiling or dried. Preservation is an old reliable method of keeping fresh beans and souring is too.  

Seed

1g is about 2-4 seeds. 
A portion contains about 15 seeds.