What seedlings do you or don't you pinch and when? Just curious & also looking for a few answers.
My Eccremocarpus scaber seedlings have a lot of space between the sets if leaves. Since this is a vine, I assume no pinch?
How bout Zinnias or Cosmos? The main stem is very tall & some are starting to get their true leaves & they are flopping even though the light is directly over them.
How bout greggii/microphylla type Salvias? They grow similar to the Eccremo seedlings.
I haven't pinched my tomatoes or peppers in the past but pinch out the Y's after they are already big & in ground for a bit. Never had a problem with their growth.
Also don't pinch Scarlet Runner beans or Ipomoea luteola which have done fine in the past. (I assume no pinch for vines?)
These are the only seedlings I can think of that would be approaching this stage.