Day 52 with serious nutrient deficiencies, can they be saved?

[Waira]

- good score mate! ...use all your fert's carefully though, no need to bomb it into overload, she's badly tapped out and no real fixing her per se this late, just helping her finish with better buds.... Mass depletion of the fan leaves has occurred, but they did their job as reserves and the buds do look fine....
And very important is your estimation of when they will finish, you don't want a huge load of "undigested" organic food lingering around in there by harvest,... 8 weeks and they might be pretty close to done, I can't tell w/o a good close-up and that's just for estimation,... have you scoped he trich's yet for how much clear, cloudy and amber (if any) there is?
how rich is the tea? If it's not a heavy feed batch, you can include some HPK to boost the PK a bit,...

 

[OrganicMids]

your plant in the front looks overwatered to me

 

[IDontExist]

- good score mate! ...use all your fert's carefully though, no need to bomb it into overload, she's badly tapped out and no real fixing her per se this late, just helping her finish with better buds.... Mass depletion of the fan leaves has occurred, but they did their job as reserves and the buds do look fine....
And very important is your estimation of when they will finish, you don't want a huge load of "undigested" organic food lingering around in there by harvest,... 8 weeks and they might be pretty close to done, I can't tell w/o a good close-up and that's just for estimation,... have you scoped he trich's yet for how much clear, cloudy and amber (if any) there is?
how rich is the tea? If it's not a heavy feed batch, you can include some HPK to boost the PK a bit,...

I was thinking most would finish around day 75 but since I stunted them pretty hard maybe a week or 2 more? Here are some pictures of 2 plants that are a little further along, I'm going to take some more tomorrow.

 

[Waira]

the stunting is not a factor now with final ripening,... look at the trich's on the calyxes, not sugar leaves, those tend to ripe/amber up sooner...
I'd say you're very nearly there, day 75 is fine... also depends on how much abmer you want; that's formed by CBN, a breakdown prodcut of THC, the plants doesn't actually make CBN.... this give the buzz a heavier, narco-sleepy buzz... more will form during dry/cure, and over time so keep that in mind... %-wise, I dislike the narco sleepy effect in general, maybe one plant I'll let go to 15-20%, the rest under 10% regardless of it's "indica or sativa" labeling....