Planting two year old old native hedging plants

I bought some 1 year old native hedging bare root plants last winter but didn't have the area prepared where I wanted to plant the hedge, so I planted them (not heeled in) in part of my vegetable garden and kept them watered throughout the summer.
So now some of the plants - especially dog rose and blackthorn are 5' - 6' tall. Two questions:
1. Should I reduce the height of these taller plants?
2. I now have the area prepared; should I plant them out this autumn (they are still in full leaf), or should I wait until winter when presumably the plants will be dormant?
So now some of the plants - especially dog rose and blackthorn are 5' - 6' tall. Two questions:
1. Should I reduce the height of these taller plants?
2. I now have the area prepared; should I plant them out this autumn (they are still in full leaf), or should I wait until winter when presumably the plants will be dormant?
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There are 2 advantages to cutting your plants back. First, they will establish better as the roots will have less top growth to supply. Second they will bush out and you will get a dense well branched hedge. I would cut back by as least two thirds.
Feed them again next spring and water in any dry spells throughout the growing season. Prune again next summer but just if they get too wide. Otherwise, prune again the following spring reducing height and width to make them bush out and thicken. Repeat feeding and pruning every spring till they get to the desired height and width and to maintain them there in following years.
"We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw