When the plants are about 10cm high they are ready for planting outside.
Take them outside and water them well.
Push from the bottom of the module up to ease the compost and plants out of the module.
You should see the roots of the plant holding the compost together.
Make a hole big enough to plant the tomato plant in your container.
Place the tomato plant and fill the hole with soil. Press the soil down around the plant.
Place a cane in the soil beside the plant. The cane needs to be about 1.2m high. Loosely tie the plant to the cane with soft string.
It is best to plant one tomato plant in a 5 litre pot (although a larger pot would be better) or three tomato plants in one grow bag.