OK boys and girls ... a little "thinking out loud", which is also an invitation to comment, discuss and advise.
The girls have been in the tent for 48 days now [~7 weeks], and are all 'breeder rated' at 8 weeks [56 days] germination to harvest.
There is a common understanding that most 'germination to harvest' claims are seldom replicated in the real world, and are usually 1 or 2 weeks on the short side. So a more conservative expectation may be that these strains are - in real world conditions, in the hands of a novice grower - more likely to be 9 to 10 weeks germination to harvest. [63 to 70 days]
Using the midpoint of these options [8 weeks, 9 weeks, 10 weeks] 63 days puts the Campus @ 'T minus 15 days'.
They've been fed fairly hard with nutes for past week or two, and some are showing signs of nute exhaustion.
There is zero 'growth' other than bud fattening.
IF ... a 14 day flush was started now,
THEN ... the only downside to a premature flush is maybe a missed opportunity to inject as many nutes into the buds as time would allow, which might result in less than optimal size/weight.
The balancing upside is that a longer flush period and less nutes might actually give a cleaner taste.
IF ... any of the plants [e.g. Killer Kush 1] actually needed more than the 9 weeks,
THEN ... it would mean an extended 'flush period' of maybe 21 days
... but where is the harm or risk in that?
In 'nature', water is all it would be getting.
Getting water for a 21 day period is not going to hurt the plant.
As long as the plant and leaves are healthy going in to the flush period, then the autocannibalisation of those healthy leaves are going to give the plant what it needs anyway.
Am I missing something, or overlooking the obvious?