I must preface that I just bought my first home and I'm somewhat of a novice when it comes to gardening. I live in cental Texas and just planted some fountain grass in my backyard (early May). It's doing very well and I'm amazed at how quickly it has grown. Each plant has more than tripled in size in 4 months. Lately each plant has started to tilt or fall over to one side. The plants are not standing erect any longer but still look healthy. I trimmed the first plant that started doing this thinking it was just the shear weight that was causing it to lean or collapse but it is doing it again less than a week later. Is there something wrong with the plant or have they simply gotten so big they cannot support the weight of the new growth and simply need to be pruned more?