Weeds covered all over my slate chippings
I am a complete novice so please kindly bare with me. Basically we had a lot of weeds in the kitchen garden when I moved in 2 years back and hence last year I removed all of them manually and as an ornamental feature and hoping weeds don't return covered it with slate chippings from B&Q around an inch and half thick across a 4mx1m kitchen garden.
Roll on 9 months and the slate chippings are completely covered in weeds again and looks like a mess. I wanted advise on how best to go around a) killing the weeds to the roots and if possible giving the existence of all the slate chippings. b) how i can avoid the problem coming back.
Thanks in advance for reading and the assistance!