Sowing

The longbean needs a long season. Sow the beans 3-5 cm deep in a warm place in mars-april. Plant them in greenhouse in June when the risk of frost is over. 

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 climbs 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 10 seeds. 
A portion contains about 15 seeds.