Cucumbers and squash grow well in the city. In terms of reliability they grow better than tomatoes. If a summer is part wet and part dry they thrive while tomatoes struggle. With climbing vine and bush varieties they can be used to create an under-story and an over-story in a growing area.
Time of harvesting depends on fruit size. For summer squash, fruits about 150mm long are of prime quality. Cucumbers for slicing usually are harvested at about 150mm to 200mm. It is advisable to continually pick fruit at optimum size to encourage further growth. With small scale urban gardening it is worth selecting varieties for smaller fruit and continuous cropping over large varieties that take longer and produce less fruit.