I bought this 7 feet tall Bloodgood maple from my local nursery and planted in late August last year. It was doing well over the winter. It's been over a month now and all the leaves are not opening and some have dropped. I noticed there are still new buds developing. It looks like a second crop of leaves are coming. I fertilized it with Osmocote 2 weeks ago. Weather is strange this year. Snow in February, sunny in March and rain every other day in April. Temperature is below normal. Night time 5 C/40 F and day 12 C/55 F. Just wondering is there anything wrong with my tree. Thanks for your help.