What would you do when your Arabian Jasmine plant start having yellow leaves?

I live in Northwest Arkansas and my Sambac Jasmine plants do very well in the hot summer months. This winter My plants started to get some yellowing leaves and some just dried up green colored. I have fish emulsion and mixed it up with water, I watered all 4 of my jasmine plants. They perked up and after about 2 weeks I pruned them back. They are back outside on warm days and doing great. I can't wait till they start blooming again!!