What can i do to my routine

[Nick]

Hey all
Im 6'2, 170ilbs and want to bulk up (not too fussy on muscle tone at the mo) i've been doing the following workout for about 6 weeks and though i have seen gains i feel myself plateauing. I work out at home with a weight bench (barbell) and dumbells so my resources are limited. Any advice on changes i could make to my routine would be a great help.
Cheers, Nick

Day one - chest + triceps
wide grip bench press 12,10,8,6,4 increasing weight
incline bench press 4 x 10
narrow grip bench press 12,10,8,6 increasing weight
chest pullovers 4 x 10
chest flyes 4 x 10
tricep extension 4 x 10

Day two - Biceps + abs
arm curls 4 x 10
reverse grip arm curls 4 x 10
incline arm curls 4 x 10
sit ups on decline bench 10 x 20

Day three - shoulders + back
forward raise 4 x 10
lateral raise 4 x 10
shoulder press 4 x 10
shoulder shrugs 4 x 10
upright rows 12,10,8,6 increasing weight
bent arm rows (pull ups) 4 x 10

Day four - rest

Day five - legs + abs
squat 3 x 10
lunges 4 x 10
leg extensions 4 x 10
leg curls 4 x 10
sit ups on decline bench 10 x 20

 

[Adler1983]

If you choose to isolate your bi's/tri's i would keep separate your back from your biceps by a day. Your bi's get hit when you do your rows etc.

As for the plateau - i've been in the same boat. I've tried many things, playing with rep counts up and down, increasing/decreasing weight, reorganizing the order and days of my workout and drop sets. Give one or more a try and see how they work.