Hi Strakey- Big picture answer is yes... Naturally, producing the terpines and cannabinoids are a nutrient resource draw on the plant....badly starving plants won't produce the abundance healthy ones have.... More specific to you question, if a plant is quickly, badly stressed- water, nutrients- it gets the signal that time is short! They will endeavor to try and mature faster,... a survival reflex I think, in nature, to try and get any seeds ripened and viable before they crash.... >>>
and can a good flush reverse or delay the effects
....I don't know with any certainty, mate.... maybe one of our in-house Uber-Guru's does! I do doubt it though,... the chemistry going on in there is likely one-way.... And flushing is a big stressor in itself, and should only be done if there's a severe pH/salts/nutrient build up problem... deficiency works two ways: just plain lack of enough of a given nute', or a pH lockout which causes that nute' to become unavailable (unabsorbable), even if there's enough of it around... in the first case, flushing would make matters worse!.. the second, a possible solution to the pH problem.... Sooo, I looked at your plants, but the pics couldn't show me the leaves well, to confirm the Ca defc.,... they didn't look hammered- :thumbs: ... and it's hardly uncommon for various pheno's to finish at different times, so that might be what's going on....just keep watching for ambering on the trich's.... check out the Sticky's at the top of the New Growers forum section, and look up Muddy's When to harvest auto's article!
...there are specific products for enhancing trich' head development.... I've tried Bud Factor-X, recommended by one of AFN's finest, TaNg,... it stimulates the plants immune system by making it think there's pest attack under way... ( I think it's an enzyme called chitinase, produced by the bugs, in their shed exoskeletons and poop),...trichomes are in fact a defensive structure, making that part of the plant unpalatable and difficult to access without getting gummed up and stuck to the plant..terp's are toxic to bugs as well....the organic equivalent to this, theoretically, is insect frass--- poops!