Hi, my husband special ordered me a miss Kim lilac for our 10th anniversary in May. It seemed to do fine until about a month ago I noticed the leaves starting to brown and curl. I asked a friend and she had me put a mixture of dawn dish soap and water but it seemed to get worse faster. Now almost all the leaves are brown starting from underneath and curled. The stems have little white dots. It gets full sun and is not crowded by any other plants. Please help me save this plant. I wish I could attach a picture to better show it.