We bought our home in 2010 (south Texas). The backyard is not very spacious, but it is a good size lengthwise. When we moved in, there were two, four-feet tall baby Shumard red oak trees, which were planted prior to us moving in. They have not seemed to grow in height but have become more full. Also, there is some Asian jasmine planted around both trees, and we wanted to see if the trees and shrubs would grow faster and better, so we planted some Miracle Gro fertilizer stakes and the leaves have become light brown. We have broken some of the branches and they appear to still have green. My question is, should they be pulled up or left alone and continue to water them?