I have three willow acacias in my back yard.  My dog destroyed our drip system, but the rain seemed to be plenty up until recently, so I have been watering by hand for the last week, week and a half. (slow hose drip at 6-12" from base)

One of our trees was blown over back in Oct (?)  It really just lost it's support, and bent over (young tree) the roots stayed in the ground.  I went out and got the green poles and my husband attempted to put them in the ground, but one of them snapped and he was left with one that wasn't right next to the tree.  My husband ended up strapping the tree partically bent to the pole.  I reminded him we would STILL need to fix it.   He told me then "the tree was going to die" from the fall and he had basically written it off. 

I managed to get another pole, but it still isn't in the ground.  my husband has a VERY busy schedule and not much time, and I can't do it by myself.  He tells me we can make time for it on Saturday.

Today I was talking to him, because the support slipped down the tree and it had been blown 1/2 over again last night.  He again tells me the tree is dead.  BUT this time I was able to remind him the trees can survive the falls because we had another one fall and I fixed it back to the supports (had just come loose) and it is fine. . .

Long story longer: 

The tree looks like it has had recent growth.  There is new growth sprouting at the bottom, but the mature leaves are yellowing more than my other trees!  How do I save my tree!!!!!!!  I don't think it is dead, but honestly, I don't think it looks that great either.