spot on RainStacks.
let me explain, since is started growing ive grown many autos strains, now everyone said grow them under 24-0 to get the biggest plant from autos, so i did and get tiny little plants that yielded very poor, some as long as 7g per plant, now i grew the same plants under 18-6 and yields where much bigger and plants much bigger at harvest,
then i thought what would happen if i grow them under 12-12 from seed to harvest, so i did, again with the same strains that performed very poor under 24-0 and 20-4, my plants went from been under 1ft at harvest under 24-0 to nearly 4ft under 12-12 from seed, my yields went from 7g dry to well over 2oz per plant, now maybe it could be down to pheno types or strains, but i grew the same strains under different light schedules and all strains performed much better when i used 18-6 or below,
ive just harvested a kc45 auto that was over 3ft high, this didnt even reach 1ft under 24-0 or 20-4 and ive grown about 30 of these now as ive produced my own seeds, so this suggests that autos benefit from a dark period.
the same goes with other strains, ive got an auto northern lights growing at the minute that i started under 17-7 and when i flipped my photo plants to 12-12 the auto also went under 12-12, again this plant is huge for an auto and much bigger than any auto ive grown under 24-0 and 20-4.
ive not tried every auto strain out their to see if this works with every auto on the market but from the autos ive grown ive always got poor results under 24-0 and 20-4 but then with the same strain got amazing results using 18-6 or below,
my findings are that the plants dont start flowering as quick, under 24-0 ive had autos start flowering at week 2 from seed, under 12-12 they dont start flowering till gone week 4, also under 17-7 or below ive found that the growth time is extended by 2 to 3 weeks depending on strain, ok so this extends the grow time but id rather have an extra 2 weeks of growth and get over 2oz per auto than finish it quick and end up with just 7g dry per auto.
so they take longer to start flowering, they take longer to reach harvest by anything from 2 to 3 weeks, but the plants end up 3 times the size compared with grown under 24-0.
so at the minute im working on my own autos strains and will run light tests with them, then i can confirm my findings or maybe it will prove im wrong. so far id rather grow autos under 18-6 or even 12-12 from seeed to harvest,
now im thinking this, autos possibly flower due to age in light hours and not age in days, if it was age in days then they would never start flowering or reach harvest under 24-0 as their not getting a dark period so wont know when they are 1 or 2 days old, so this suggests that the flower due to age in light hours and not age in days.
so under 24-0 their maturing quicker and reaching harvest quicker, the kc45 autos ive grown started flowering around week 2 to 3 of growth under 24-0, under 12-12 from seed it was 4 to 5 weeks before any signs of sex or start of flower. so im wondering if they do flower and reach harvest due to age in light hours because under 12-12 they grow longer, they get bigger before starting to flower and are much bigger at harvest.
so i will be running some light schedule tests, ive got around 500 seeds now and working on another auto strain, then i can run tests and compare results along the way, but from my own experience i wont be using 24-0 again, results are poor and they start flowering to early, so the schedules ill be testing are 20-4, 18-6, 16-8 and 12-12, then i can compare plant size and dry weight, but for now id have to say that from the autos ive grown that 18-6 seems to be about the best schedule to use, i would say 12-12 but i dont want everyone using 12-12 and saying i was wrong, but for me 12-12 from seed to harvest has so far produced the biggest yield with all autos ive grown, but until i can fully prove this id say anything around 18-6 is best for autos, if i do find out its 12-12 then ill go with that, but for now id just say autos benefit more from a dark period and results will be much better compared to 24-0 and 20-4