"Beecrofter" wrote in message maintaining a tree
at a
specific height is very labor intensive. Are you sure you are up to
the task? It might be better to plant something that doesn't exceed
your height requirements ,

So true....the first year or two you have enthusiasm for the task, but then
life intervenes, other tasks and events divert your attention, and one day
you look outside and the trees are enormous. Unless you are unusually
disciplined they will get away from you. White pines are very fast growers
once they get established.

Please consider replacing them with something that will mature at the height
you want. If you don't want to lose your privacy screen temporarily,
replace alternate trees, then come back in a few years and do the rest.

Cheers,
Sue (who once had dreams of espaliered pear trees....after 15 years of
trying to keep them in bounds, I bit the bullet and replaced them this
spring--what a relief!)

--

Zone 6, South-central PA