Green beans should have a bright, strong colour, with crisp pods with a satin-like sheen. They should not look wilted, discoloured or brown. They are best eaten when young and tender. To tell how fresh they are, snap one in half. The ‘snap’ should be clean and clear. Don’t buy them if the ‘snap’ is lacking, and if the insides do not seem juicy when you break them open. Home-grown green beans are in season from June to September.