Hello! If you haven't already done so pinch out the tops, this will encourage your plants to bush rather than become leggy. Try leaving your plants outside completely during the day time once the cold weather has gone, taking them back indoors at night. This will probably be in a few weeks time. Here in N. Yorks it is still too cold for this and far too windy, the strong winds will damage the plants completely. Once they've had a few days of this, leave them out overnight in their pots before planting out and staking if necessary. Hope this is of help