I grew 2 White Widow X BigBud plants a while back. Heres some notes from my grow in case you were interested (you are growing a Big Bud cross as well)
Home made DWC bucket (15 gallon rez filled with about 8 gallons of water.)
I kept the ph at 5.5-6.0. They didnt like high PPM...mine was 500 max and more like 400 most of the way.
They exploded at the switch and ended up about 4 ft tall.
I used a 400W MH for 27 days of veg and then a 400w HPS for 63 days of flower.
I did no topping or training during veg and pruned leaves here and there throughout the grow to open up the canopy.
I added Superthrive periodically and some H202 daily.
The only nutrients I used was GH Floranova Bloom (lucas formula throughout entire grow).
The temps during the day were around 85 and at night around 68.
My rez temps were no higher than 75.
The root system was very impressive with alot of it resembling "rope" pretty thick rope too (this was my FIRST dwc so maybe thats normal).
My colas got pretty fat and overall the buds were very dense.
I gave her a 48 hour dark period (not by choice but because I got lazy and didnt feel like chopping when I was gonna)
In the end I finished up with 10 zips dry total (from both plants). I'm not a professional grower by any means and I've made many mistakes but 10oz from 2 plants isnt to shabby. So you dont have to do everything PERFECTLY to get decent results. I'm proof of that. Good Luck...