what do you think of this bulking routine?
 

Monday- Back/Biceps
Deadlifts 4x5-8
Rows 4x5-8
Chinups or Pullups 4x8
Barbell Curls 4x8-12


Wednesday-Chest/Triceps
Bench Press 4x5-8
Incline Bench Press 3x8-12
Dips 3x8
Skullcrushers or Close Grip BP 4x8-12


Friday- Legs/Shoulders
Squats 4x5-8
SLDL or Leg Curl (do this if lower back recovery is issue) 4x8-12
Calf Raises 4x12
Military Press- 4x5-8
Shrugs 3-4x8-12

what do you think?

Bulking is 85% nutrition, 15% training, you can train with this program as vigorously as you'd like, but without a SURPLUS of calories influencing overall weight gain you will gain a very minimal amount of weight. It all depends how long you plan on bulking for?, what is you're current nutritional caloric intake per day? (protein wise etc), all these are important in establishing a very usefull and safe bulking routine that will account for a large amount of gains if done correctly.

Perfectly said.

currently 3400-3500 kcal every day from whole foods.

including 250g protein, 400g carbs

Yes, but what is youre body structure and caloric maintenance level?, a recommended bulking nutritional routine specifs that a person must create a caloric surplus, usually around 500 calories, and should gain about 1 pound per week.

If you are eating adequately then you should bulk no problem, if theres some nutritional flaws and you are not recording/ training at a high level of intensity the results might be impacted in a negative way.

Hope this helps

Couldn't agree more! Properly knowing your caloric baseline is essential. 500cal could make a world of difference in weight gain. Something I learned later than I should have!