Help with Jasmine flowers please

[jyo123]

Hai, Jasmine lovers. I have about 7 or 8 varities of Jasmines 3 of them in the ground and rest of them in pots. I live in San Antonio, TX which gets enough hot in summer as in India. I take care of them very well by protecting them in winter and all, my problem is that I see cluster of buds but they turn purple or brown and drop off before they bloom. even the flowers which bloom are not healthy. I feed them with slow releasing fertilizer and with super bloom during the blooming season. However, since the soil here is alkaline I add little bit of Miracid once a month.I water them as needed every two days when there is no rain the plants in the ground have automatic sprinkler which is activated 2 times week or when needed. What am I doing wrong so that they are not flowering as they used to. I used to get plenty of flowers. From past two years I am not getting flowers as I used to get. The plants look luscious and healthy. I changed potting soil and all. Some one please please help me with this. These are my babies. I had these plants from so many years.

[aromedindia]

Is it happening both with potted and those planted in soil.I think these have been over fed particularly with N. Pl. add organic manure and remove some soil around plants. It looks that plants are not in nutrient and water stress. If bearing good foliage nutritional imbalnce or exess of N may be the reason. So add compost/vermicompost or any other organic material available in the marketplus make micronutrient spraying if possible. Also indicate the type and amount of slow release nutrient with composition added per plant or per pot.
I belive that they will bloom properly in few weeks after getting organic manure and micronutrient application.
Thanking you
aromedindia@gmail.com