plants not flowering/producing bud

Hi there. I grew some early girl in an outdoors greenhouse and one plant has produced some nice bud. the others i identified as female but simply didn't flower and i was wondering why that might be . the plant leaves are healthy looking, dark green in colour, and i was thinking everything seems to be going into the leaves. Any idea what the problem might be? Anyhow, I am happy enough given it was my first attempt and one plant has produced good bud.

 

i could take some pics and post but yes , I noticed those pistils i believe, the little hairs, but that was it , strange, what do you the think. The other is great, ots of bud

 

these plants were grown outside in a green house- no artificial lighting. they produced lots of leaves but just didn't bud apart from one of them. I am wondering if perhaps early girl seeds are not the highest quality and with the ones that didn't bud I was replanting them a couuple of times into larger pots- maybe this stressed them? I find it curious and can't seenm to get any explanations as to why this may have happened from my research on the net.