The beans should be watered well and early plantings should be protected with a cloche or fleece during the first few weeks.
Remove the smaller and less robust of the two young plants, leaving just one vigorous seedling per cane. Pull up any nearby weeds.
As they grow, ensure the plants continue to twine around their canes. Check them regularly for any signs of disease.

Plenty of moisture and a fertile soil are essential for a good crop of beans so avoid very dry, poor soils if possible and prepare the ground well before planting or sowing. Like most vegetables, they enjoy a lot of sunshine and prefer a fairly sheltered site with some protection from cold winds. This also helps to avoid poor pod set due to poor pollination.