Pinching out.

[ann-the-nan]

Bought some wee plants in modules (husband poorly, haven't had time this year to grow from seed). They have been under cover for a couple of three weeks now and are putting on the inches. (O.K., So I work in old money.) Should I have pinched them out, and if so, is it too late? I have snap dragons, trailing petunias, busy lizzie, and black leaf geraniums. Sorry this is a basic question, but my brain is not doing anything basic these days.
Thanx for forthcoming help.