Help! autoflowering flowers then stops!

[ftsig]

hello a friend has two fem auto . on day 40. On about day 20-25 started to cleary flower fora about a week. Now thay have all stoped flowering and no signs of flowering has been left. They are lookin very healthy and nice green and they are getting taller every day. But nothing is happening. What must he do?
my grow is:
hps400w lights on 18/6
5 lt pots
good viobizz soil
mild N-P-K nutrients and some more
good temp 25c
good humidity 55%
ph 7
watering carefully.

 

[Seedling]

Well the only thing you really can do is to change the light regime to induce flowering again. As they started flowering they must at least be photo sensitive so giving them some more darkness should get them back to flowering... try going 16/8 maybe, or to be sure a bit less 15/9....

 

[Muddy]

Might also be what you are feeding them. What's the ratio on the N-P-K of your nutes?