Miwa does some form of foliar feeding, so would be the best to ask, dont quote me on this but im thinking its around 1/5th of the stated dose,
actually let me check my sns flower feed then i can tell you what that says
ok my sns says for regular feeding use 28ml per gallon
foliar feed you use 1/4 strength or 7ml per gallon and spray plants every 3 to 5 days, so this sns flower enhancer i got can be used all through flowering at 7ml per gallon, as i mix up 2ltr pop bottles i would mix up 3.5ml per 2ltr and use as foliar feed, on here ive read people use 1/5th of the stated dose to foliar feed with but this sns says 1/4 stated dose, but speak with miwa as he foliar feeds so might give you a good idea of whats best, i might even try it myself with this sns product, in fact i will, ill give it a few days then ill foliar feed this instead and give my plants the DnS nutrients like normal, then i can see how foliar feeding works, its just suppose to be a more efficient way to feed the plants so im guessing thats why the dose needs to be a lot less
the best method i use for deciding when to flower i by flipping 12-12 when the plants mature, if you flip 12-12 early then you get more stretch period as the plant wont start flowering until its fully mature, they take longer to mature under 24-0 and 20-4, but under 18-6 and 17-7 my plants show sex from about week 6 onwards, most take between 6 and 8 weeks to show sex, once they show sex i know their fully mature and ready to flower, then when i flip 12-12 they start flowering much sooner and you have a lot less stretch time.
you can go 12-12 from seed but the plant wont start flowering until its mature which under 12-12 form seed is anything form 4 weeks onwards. but i find 8 weeks in veg and all plants are showing sex, i think sativas take a bit longer to show sex and they also take longer ot flower, the jack flash im testing at the minute is 11 weeks in flower compared with 8 or 9 for indica heavy strains,