How to grow indoor cucumbers
Regularly sow cucumber seed in pots, 1.5cm deep on their side. Transplant into large pots as they grow.
Keep the soil moist. Ventilate the greenhouse and spray the floor with water to keep the air humid. Tie side shoots to wires or net and remove growing tips two leaves beyond each fruit to encourage the plant to focus its energy on growing the fruit.
Cut (not pull) cucumbers when they are a reasonable size and the sides have grown parallel. Yellow fruit are overripe (unless a specific yellow varieties) and will stop the plant producing fruit if not removed.