Question
I have weeds and grass growing between my retaining wall bricks and also in planter. What can I use to kill and
keep weeds from growing back? Nursery guy recommended KILLZALL or Over-the-Top. I have dismantled part of the wall
and will rebuild but want to apply weed and grass killer between bricks and etc. I also have a cockroach and earwig investation in the planter I would like to eliminate.

Answer
john
sounds like you need an exterminator for the roaches and earwigs. roach hotels work the best(indoors and outdoors). earwigs are nusiance pest and really won't hurt anything. sounds like you may be keeping the planter too wet?
weeds will keep regrowing as they have for milleniums. stay ahead of it by monthly sprayings of roundup. it's safe and biodegrades in 2-3 days. it will kill the roots also. don't get it on the foliage of anything you want to keep alive. lay newspaper down 2-3 layers thick before mulching the planter.
good luck
rick