You should be able to count at least 7 leaves before it's finished growing, and I only count 5 (the withered one counts because it was a real leaf). Many plants go to 9 leaves. Even if it is a very early variety, I would not expect it to be ready before mid June. My softnecks are still growing new leaves, and the hardnecks haven't started producing scapes. Give it time.

I harvested two kinds of soft neck last week. The mild winter here means that all the varieties I grow will be earlier than usual, even the hardnecks that I generally take in July look as if they will be ready in less than two weeks.

Also, I judge readiness by the dried leaves--at least four, better to have five. I usually end up with three layers of wrapper after I strip off the drying ones.

So, it all depends upon where you live and what kind of growing season you have had in any particular year.