New yew hedge central tip trimmed

Hi,

I planted new bare root yew hedges last October. Some central top stems started to turn brown, so I had to cut them to save the hedge. Now they are still green, but my question is will these be still growing in height? I’ve read that a yew hedge when tips are cut will only grow 10cm in height per year. Is this only for first year then pick up to 30cm/year? Or stay forever slow growing in height?
thanks