I got one of Jacob's jack seedlings about a week and a half ago. It has no branchees on it and is about 6 inches tall. Should I pinch it to encourage branching or will it do it on its own?
I don't think it will matter either way. I have quite a few jackfruit seedlings that have been topped after failed graft attempts and they all seem to just regrow another central leader and continue to grow straight up. The only ones that I have been able to get to brach out nicely are the grafted ones.
without seeing it i would probably wait until it branched out more, it needs all its leaves to create energy at the moment.