7 Week old Plants, end of 2nd week in flowering

Here is 4 plants ina dripp sys. at 7 weeks old and 2nd week into budding, the strains are (1)CheeseWreck, (1)NLx Skunk, (2) White Diesel's. im switching the nutrients every week instead of every 2 weeks.. i have a 400w HPS lighting system. 3 of the plants r topped n the one in the top right isnt. they are very healthy with thick stalk's n i dun see ne buds yet should i just stay patient and keep waitin or is there a problem why there not budding?? n yes flowing stage is 12/12. comments Welcome.. Thanks

err... can't see any pics?!?

picz or it didnt happen.

Pics or GTFO

yeah I see no pics it's hard to say if it is right or wrong

I think your plant has big problems, I have never seen one turn invisible before WOW.