Afghani #1

Yes I would say it's a little bit of iron defiency . I add calmag plus which contains iron as I used to have this problem but it's stopped now . Also what leaf blower said was true . You may already have iron in your soil but if it's not at the correct PH the plant won't absorb it. So checking PH is the first thing you should do . If that's fine maybe add a little more calmag plus if it contains iron .