My Jasmine is growing very "thick", but I can't get it to bloom, it's in its original container-10-1/2 wide and 13-1/2 tall. It's in my backyard, getting full sun 8+hrs a day, I water it at least twice a week, more if weather is warmer(from daytime temps.: 65 to 85+). I fertilize it with a 20-20-20, 1/2 tsp. to 1 gallon of water, every week. Can someone help me figure out my problem?

Thanks in advance,

Annamaria