How to Grow Broad Beans

Overview

Broad beans are one of the easiest and earliest crops in the home vegetable garden. They can be sown in autumn for a head start or in early spring, and provide one of the first harvests of summer. Young broad beans are sweet and tender, and the tips of the plants can be eaten as a delicious bonus green.

Health Benefits

Protein and fibre rich: Broad beans are an excellent plant-based source of protein and fibre, supporting muscle health and healthy digestion.

Folate and manganese: Exceptionally rich in folate (one of the highest plant sources) and manganese, supporting cell growth, bone health, and metabolism.

L-dopa, a dopamine precursor: Broad beans naturally contain L-dopa, a compound that may support dopamine production in the body, making them a uniquely interesting crop to grow and enjoy.

Soil Preparation

Broad beans grow in most reasonable soils but prefer well-drained, fertile ground that has been improved with compost. They tolerate heavier soils better than most beans. The ideal pH is 6.0 to 7.0. As legumes, they fix nitrogen from the air, so do not need nitrogen-rich fertilisers. After harvest, leave the roots in the soil to benefit the next crop.

Sowing & Planting

Sow seeds directly outdoors from February to April for summer harvest, or in October to November for overwintering (use hardy varieties like Aquadulce Claudia). Sow 5cm deep, 23cm apart, in double rows 23cm apart with 60cm between each double row. Support taller varieties with canes and string along each side of the row.

Care & Maintenance

Water during flowering and pod development but broad beans are otherwise undemanding. Pinch out the growing tips once the first pods begin to set; this removes the tender shoots where blackfly congregates and directs energy into the beans. Support plants with canes and string to prevent them toppling in wind and rain.

Harvesting

Harvest from June to August when the pods are plump but the beans inside are still tender and green. Pick regularly from the bottom of the plant upwards. Very young pods can be eaten whole. For the sweetest flavour, cook and eat immediately after picking. Older beans with a tough skin can be double-podded.

Common Problems

Blackfly (black bean aphid) is the most common pest, colonising the soft growing tips. Pinch out the tips once pods have set and spray infestations with soapy water.

Chocolate spot causes brown spots on leaves and stems in damp conditions. Ensure good spacing and air circulation.

Pea and bean weevils nibble notches in leaf edges but rarely cause serious damage.

Companion Planting

Broad beans grow well alongside potatoes and carrots, fixing nitrogen to benefit neighbouring crops. Avoid planting near onions and garlic, which can inhibit the growth of legumes.