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###11/5 update####
PH 6.0
PPM 800
CO2 600
Temp 72F
cycle time 4mins-off/11seconds-on
#
Progress is looking good; last week of pure veg; switching to 12/12 in 1-2 weeks for flowering due to growth height restrictions. During change-over from veg; complete system drain and flush planned to wash any salts out. With aeroponics this tends to be less of an issue from RES as very little water makes it back. Considering running a separate drain off tank and main RES to measure both volume and ppm levels. Probably next grow cycle.
Thinking down this line; I could run 3 tanks
1. Fresh nutes
2. Returned nutes
3. Fresh water
Then cycle time Fresh water cleaning once a week.
Raised PPM and cycle-on time; nutrient ppm in res started slowly dropping mid-week.
Leaves are fanning upwards and undergrowth is huge in flowering phase. Should i be worried about the upwards fan, should I trim on this point or just leave as is and just remove dead leaves?
When mine get to this point, I deleaf anything that doesn't have trichomes showing or are laying ontop of another bud..the flower auxins are in abundance and allowing a higher par down deeper into the canopy can really help out lower bud development. One rule I follow is to avoid removing more than 30% of the canopy on any day, usually followed up with a light nute application and a few days rest before another selective deleaf. To this end, I've reduced workload during trimming and have had less popcorn buds. On a side note, resin production is a defence mechanism of the plant to discourage browsing by pests. When the right amount of leaves are removed, the plant will respond with an increase in resin to counteract the browsing.. I don't know of any science study's that have been done in this area, but my trials have shown a noticable difference..
Cheers
Thanks @dwchc and @Cannibalgardens
Harvest in next 48-72 hours pending time with holiday; i'll update the journal with results.
I did 2 experiments for this grow that support both comments. Keeping a consistent canopy seems key for yields, i'll go little more "cutty" with reducing canopy towards middle of bloom to increase light on next grow and run a control with no canopy cutting as a test.
1. the green crack on right side - 1 plant no trimming, 1 plant moderate, 1 plant heavy trimming throughout grow to keep a solid canopy. I'll weigh out results, but so far the the heavy trim is showing the largest colas.
2. The left side is the ak47 - it has 1 clone growing in back and 1 re-grow on same plant that was harvested on my first grow in front. Curious to see the yields and strength on re-grow.
One thing I did notice was the nutrients starting spiking on return res; 800 on feed / 1200 in return. Even when i dropped to 200 for flush, the return was still showing 600-700ppm. Interesting; not sure on the "why" or what nutrient is coming back at such a high level.
@CRiSPrGrow,
Thanks! Will add more info on setup for week 2.
Using a mistking repeat cycle timer; the 7s-on/5m-off is the spray cycle for the aero nozzles. The aim at top of rootzone and spray a 50 micron mist.
+6 strains
+1 strain
S.A.D. Sweet Afgani Delicious F1 Fast Version®
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