Try again with the long post!
I bought the seeds from Herbies in the UK. But I don't think the seeds are the problem!
Thing is, I'm living in the tropics, with ambient temps going between 86 degrees and 93 degrees - and that's with no lights on in my growtent. (When the temp gets to around 93 the main tent lights go off and all the fans come on!)
The other drawback is that the hours of daylight shift from 13 light snd 11 dark - to 11 light and 13 dark. So I ended up going for a small growtent.
This is my first successful grow - I now know enough not to try and grow my seeds outside, for both the reasons above. There is constant air circulation with a bank of 4-inch computer fans inside and a 6-inch fan blowing in at the top through a vent. And constant CO2 being generated to combat the high temps.
Also I have done something I haven't come across on the forums - placed my grow tent on its side. I'm running 8 plants in a tight LST group, and apart from some slight PH problems, and spider mites, all has gone very well. All except for the three herms I have now discovered and pulled out.
I tried four different strains - all feminized seeds. The Sensible Pure Kush is doing the best. The two cotton candys have both gone herm, as has one of the two Kera White Thunders. This I am sure is due to heat stress. Fortunately there is no signs of any red hairs on the other colas so I'm hoping I caught the herm plants in time, even though at least one of them self-pollinated.
Here's a couple pics of my grow - I'll send some more in a while as the buds are coming along nicely, although compact, and are now about 2 weeks underway. (The photos here are up to 8 weeks - that's the one with the feet!)