ROYAL COOKIES [1]

3 weeks flowering. This week I had a big problem. All plants have some male flowers. Does anyone has an idea how this come? I can only thing of one reason. Can someone confirm my suspicion? The day starts at 7am and ends at 7pm. But the third or fourth night of flowering, the lamp was still burning around 11pm. I think my automatic lightclock hadn't turn off the lights. Immediately I turned the light off. Since then I control the light everyday and this has not happened again, and therefore this happened only 1 time. Could this the reason be of the male flowers? I can easily remove the male flowers. And NO new male flowers have appeared since I removed them. Almost in every armpit, of the three to fourth oldest side branches of the plant, appeared 2 male flowers. Half of the time the plants were outside. They were inside in the early morning and when temperatures were lower than 25°C. Plants haven't grown much last week (the tallest (#3) : + 10cm = 110cm ; the smallest is 95cm). I think the plants show some shortage on fertilizer (lower leaves look a bit yellowish, some bladestems have some purpleish), I was planning to give some Plagron Green Sensation (high on P + K). Or does someone have a better idea? Sorry but it seems 'paragraph space' doesn't work....