We planted 3 Green Giant Arborvitae about 6 weeks ago according to directions on the tree and some guidance from local nursery. The soil around here is heavy clay; however, we mixed the soil according to what the local nursery said. Watering has been every few days for the first 2 weeks and then I began checking the soil moisture and watered 1 time a week (deep). My once lush trees are now lime green and crispy needles that just fall off in your hands when you touch them. (forgot to mention, one tree is doing fine the other two not so much). Could this be due to the heat? 104 degrees last couple of weeks or am I watering too little even though I still check the soil and it's moist under the mulch and down a few inches... I'm at a loss. Too much water, not enough water for the temperatures & wind? Your feedback is much appreciated.

Weather plays a big part in how well and quickly plants reocver after being transplanted. The size of the root ball is also important. An undersized root ball will never be able to support the demand for moisture from the needles. Even with good watering practices, the roots cannot absorb and move enough water. Your description of the condition suggests your plants may not make it. if there is a warranty involved, be sure to contact your retailer and follow their suggestions.