Water in the morning

Ok, so i have been given some advice from my brother who is a really good gardener. He has done many courses and stuff so he knows what he is on about. So he came and looked at my plants and told me that instead of watering them in the evening, water them in the morning. The plants need the water throughout the day while the sun is shining on them. So i have started watering them in the morning today, so lets cross fingers and hope that they grow alot better than what they have been. My plants havent been growing as well as they should be, so i hope this works.