I bought 2 yellow buckeyes about 2-3 weeks ago. I am not able to plant them in the ground for about another week or so. i temporarily planted them in each on in a 5 galloon bucket ( I bought a total of 4 trees) The other 2 trees I bought, 1 red maple and other is a crusader hawthorne, are doing great. But the Buckeyes aren't doing that great. The few yellow/green leaves that were on it to start with are turning brown and drying up. I water them every day or every other day and the buckets have drain holes so I don't think they are getting too much water. Not sure what else to do. Any suggestions??? Thanks so much