I just returned from a ten day holiday to find my japanese acacia tree leaning over. I checked with neighbours that there have been no strong winds that could account for it. I am pretty new to gardening and am not sure what it means, if it will fall over and if there is anything i can do about it. The tree is pretty well established about 20foot tall at a guess, there is a gap in the soil where the tree has moved and if i pull hard i can move the tree back, if i push it doesn't seem inclined to lean over any further? Any and all advice would be great. Its such a pretty tree i would hate to loose it.