Broad beans are not recommended for patio pots
Blackfly (Black bean aphids) are a common problem. However, an infestation usually starts at the tip of the plant so the prompt removal of the tip along with the aphids on it, will quickly deal with the problem in most instances. Plants can collapse or fall over, especially in exposed windy locations. Positioning stakes or canes at the ends of the row and tying string lines between them can provide support for the plants and prevent this happening.
Harvest from June to August. The flowers bloom in succession from the bottom of the plant upwards so the lowest bean pods will also mature first. So it is best to also harvest from the bottom up. Immature pods can be eaten like French beans but are usually left to mature and then shelled for the juicy beans inside. Don’t leave them too late however or the beans can become tough and starchy.