Solanum melongena 'Black Egg'

Also known as eggplant, due to the shape of the fruit of earlier varieties, aubergines are becoming an increasingly popular choice for the grow-your-own enthusiast. Given a good summer, plants can be very productive, especially when grown under glass. However, aubergine plants are sensitive to cold winds and heavy rain, making them less reliable when grown outdoors.

Solanum melongena 'Black Egg' is a Japanese heirloom variety, bearing purple flowers and purple-black fruit. Stems and leaves have a purple hue. It's more tolerant of cooler climates than many varieties and fruits set early – making it ideal for shorter seasons.

Pinch out growing tips when 30cm high to encourage branching, feed weekly with a high-potash fertiliser once plants have started to flower, and mist fruits with water to encourage fruit set. Remove fruiting sideshoots after five to six fruits have set, and pick fruits before the skin loses its gloss – a symptom of over-ripeness.