Hello, 12 days ago we purchased a Heritage River Birch clump. We were not able to get it in the ground until today. After 6 wet weather days a third of the leaves had turned yellow. On days it didn't rain significantly it was watered, erring on the side of too moist thinking a birch could tolerate that. 12 days later still in the pot the yellow leaves have browned and dried up, more leaves have turned yellow and some of the green leaves are looking dry. Less than 1/4 of the leaves now look healthy. We now water it twice a day believing it's not retaining enough moisture. How likely is this to survive if we get it in the ground today. Do you think it was more likely under or over watered, and why was it so sensitive to either? Thank you!