I just planted 2 24' box chilean mesquites in my back yard where we have grass. Any suggestions? The nursery and my Landscaper said it was ok to plant them in grass. Now I am not convinced it is ok. We have soaked them and let them dry out and soaked them again etc., But they also get water from the sprinklers. Also one limb seems heavy and wants to fall to the ground. Each tree has 3 trunks on them. do we prune or wait for the planting shock to settle down. We are staking it right know to keep it up.