Posted: 25/08/2013 at 10:05
I have had these exact same symptoms this year. I planted about 100 hornbeam bare root at about 6/7ft. so slightly larger plants. the soil was in good condition. mychorizal fungi was used, as was a base dressing of fert. And finally a bark mulch was put down to aid with water retention in this dry year.
I have been scratching my head with this one i'm afraid. Been checking them regular for new signs and at present of the 100 ive definately lost about 10. then about 40 are fine and all leafed up with the other 50 in varied degrees of either leaf break or still dormant. but green sap wood. spoken with growers and other professionals about this. everybody clueless.