I purchased a weeping yaupon holly shrub this early spring around March. It's been planted since, but has slowly been losing it's leaves. It seems to still be growing from the shoots off the top, yet the lower weeping branches are shedding their leaves. It also seems that there are some berries beginning to form. Is this normal for them to start shedding so early? Could it be drought related? Or from over watering or soil conditions? It is planted in clay soil mixed with potting medium. Any suggestions??