My friend has asked me to look after her tomato plants for two weeks. She has grown them from seed and they look really healthy. I've put them outdoors on a south facing patio. However, it is still very cold here up north, especially at night, although there is no risk of frost as we live by the sea. Should I be bringing them into my conservatory which becomes very hot during the day? I'm going away for a few days and don't want them to die. Or should I put them in the shed which has a window. Any advice would be appreciated.