Hello. A newbie here! We recently moved into a new house and the side yard has a vine of Lavender star flowers. It was overgrown and no flowers at all. I trimmed it during this summer. Started watering it regularly. It has lot of fresh growth and very very few flowers now (about 3!). How do I make it flower more? It is planted in partial shade where it gets late afternoon sun. Any suggestions would be very helpful! Thanks in advance.