I find it best to water as early in the day as possible – this not only helps prevent plants from getting scorched if water gets on the leaves, it also prevents them from sitting in wet compost during the colder night-time hours.
Then, as greenhouse crops ripen, I like to increase the feeding to twice a week to help encourage the best fruit I can get from the plants. Personally, I use either home-made comfrey feed or a good organic tomato or seaweed feed. After watering the plants, I always damp down