you could do 6-10 if they are clones (b/c their heads are at the same level, and they are smaller) or 2-3 regular full grown plants (20 inches and higher) I'd shoot for 3, that way if one is male, you'll be left with two, which is a better number for that light.
4x5 Reviewed by 4x5 on . 175W MH- how many plants? I have a 175W MH/HPS ballast. How many plants can this light successfully grow? I have a 4x4 area to work in.. Thanx! Rating: 5