murph, i talked w/ some arborist pals today about this... so.. a couple / few things: a) did you test the soil before using the fertilizer spikes? One friend (forestry arborist) said that the spikes could cause "hot" spots in the soil where it would become too acidic. But, he said, with adequate watering this would not be much of an issue. b) another friend said (park arborist) said that too much mulch, too high on the tree trunk will cause both growth and foliage problems on the tree. Both agreed that light could be an issue. For example many years ago we worked on planting many doug firs that were about 2' tall. These firs were grown in a field with full sun. We transplanted to areas which were mostly shade. Only one out of 12 made it!! EEK. What were your trees light conditions before and after?
We also talked about watering. If roots are burned, over watering may cause rot thereby increasing disease and further die-off. General recommendations included a few deep waterings with enough time to dry out (couple of days to a day), mulch away from the trunk, but form a deep ring around the tree, test the soil, and stake/support the mast of the tree if heavy winds prevail....
the multiple grow and die-back within a season is a recall from school-- we planted ash trees and would purposefully destroy tendrils to see what path the tree would take. It would usually have a number of re-growths before giving up or running out of energy for the season.. this is what you are probably seeing with the growth and die-back on your trees.
Lastly, maybe give the trees about a month of TLC thru august and then let nature run its course. If the trees are OK thru aug, they'll probably make it.
Good luck, we all need more beautiful trees! I hpe this give some additional advice or food for thought at least... -art
ps, i just remembered something pretty important for the future of transplanting trees--- it is very beneficial to prune the roots a year before transplanting. to root prune you'd walk around the tree about a few feet from the trunk and cut down with a flat spade. when you do this, you break some roots which then re-grow closer to the trunk. when you replant/transplant the tree a year later, it's root system is more robust closer to the trunk, therefore losing less vigor in being able to grown. it is possible with your trees that some left behind major root systems that it was counting on for survival...
I know that the doug firs and other evergreens send LONG shallow roots out, if they lose these, they can be comprimised... bye for now. -art /forums/images/graemlins/smile.gif