They can be planted from seed as soon as the soil is warm (day temperatures are around 12C), in full sun and loose, well drained soil.
Aim to sow 0.99 inches (2.54 cm) deep and try to ensure a gap of at least 3.96 inches (10.16 cm).By our calculations, you should look at sowing Oregon Giant about 5 days after your last frost date.
Young beans can be picked when mottling just begins to appear. For dry beans, allow pods to start to dry and brown on the plant, then shell and allow an extra few days drying inside to make sure all moisture is gone from the bean for storage.
This variety tends to be ready for harvesting by late summer.Referenced in the 1937 McFayden Seed Catalogue, so variety is at least from the early 20th century.