I have been give responsibilty to care for three large (20 Feeet) Ficus in the Church Atruium, They had not been fertilized or Pruned in 3 to 4 years. I pruned lightly and cut away all dead limbs mostly on the top and fertilized with root stimulator and and acid fertlizer in liquid form. They had been wated heavly every week. I suggested every two weeks as they go very deep into the ground. I welcome suggestions as I have never cared for Ficus this large indoors and in the ground. Should I mist every week ??? The heat is on in the winter??