Posted: Today at 09:39
Hello Harj Samra and welcome
Are you really really sure you want Leylandii? They grow huge, need a lot of regular cutting back, and if you cut the sides back too far you are left with brown branches which never ever turn green again. Also they suck all the moisture and nutrients out of the soil so that nothing will grow near them, not even a lawn.
Have a look at beech hedging, holly and laurel and have a re-think please - they're all much less trouble than Leylandii
I'm sure others here will give you some other hedging suggestions