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48 hours after hydro, 1 has sprouted and 1 has not. At 6 days I've got two viable sprouts with nice roots. This is the first time I've tried using Rapidstart this early and I'm sure these are the best roots I've seen at 6 days. This is also the first time I partially split the rockwool and laid the sprout into the center with the root already out of the rockwool a bit. It worked, almost instant seedlings.
Pretreated the hydroton with R.O. water, Rapidstart and Mycorrhizal. Planted the seedlings just deep enough in the hydroton where the bottom of the rockwool barely reaches the water level. Set light at 36 inches and reduced power until I measured under 10,000 lux at plant. Set the humidistat to 65%, heat @ 70 F. I'm targeting a leaf VPD of .5 at first with a gradual increase to 1.0 over the next two weeks. Set the circulating pump's interval timer for 1 minute on, 5 hours off. Exhaust fan limits are 79F and 76%
*second internode just visible
*leaf temperature is about 2 degrees cooler than air temperature
* 5.8 PH 260ppm
4-29 I realized the seedlings were placed too deep in the hydroton. (The Leaves looked a bit like they were flooded, rockwool was soaked. Bigtime no-no) so I raised them and I added 1tsp Floragro to 10 gallon reservoir PH=6.5 PPM=290 -hopefully, I didn't break any baby roots.
4-30 Found PH at 6.5 = lowered it to 5.8 3rd internode visible (12 days) ppm=300 leaf temp is 2 degrees lower than air temp extended time between water interval to 8 hours (trying to get roots to grow out of the net pot)
5-1 New nutrients: 400 ppm ph=5.8 No Florablend this time and I added Calmag, both because of malformed leaves.
5-2 Because of malformed new growth, decided to re-calibrate Ph tester and found PH to actually be 5.1! D'oh! Now I can make sense of the malformations. adjusted to 5.8 using 1 gallon of .5 tsp/gallon. ppm=380
5-3 Spot check PH with 2 meters=5.8 Removed PerfectPH for now. Leaf temp deficit has increased and is now 2-4 degrees cooler than air with no sign of burning. Increased light power to 12k lux. I see the first root escaping net cup (1 inch). Growth rate should explode this week.
5-4 *4th internode, side branches and 1st root presented yesterday (16 days). Changed light intensity back to under 10k. Temp hit 8o yesterday so I added a swamp cooler (need both humidity and cooling right now). It's still too soon to push up vpd because I see these plants over reacting to a small RH drop. After checking leaf temperature (and found very small delta) I decided to lower RH by 5%. At this temperature it seems transpiration slows too much when RH is over 60%. @%50 4-5 degree leaf delta, 55% 2 degrees, 60+% no delta
5-5 Increased light intensity to 18k lux yesterday as an experiment and the plants handled it OK but a little stress was evident, at 15k now. It seems I won't have enough cooling to use the Barrina lights in the warmer seasons.
5-6 *5th internode just visible (18 days). Struggling to keep humidity high while keeping heat low (vent exhaust). VPD is too high occasionally but they are handling it OK for now. PH = 5.8 PPM=380 75F 60% 24 hour average
5-7 LST starts today. RH was in the 40's this morning because humidifier ran out and notification was set to low. They are OK but they didn't like it.
5-8 Solution mixed to 750 ppm but should have been 600 max...I forgot to add CalMag after ArmorSI. I did add it after the Micro and ph adjusted with 1/4 tsp ph down. I think its OK...I need to be super careful with VPD or they will probably burn. Put back PerfectPH balancer. Increased light intensity to just under 20k lux. All looks OK but I can tell the PH has been too low for too long. (both PH testers were reading high a while back). I top watered with new solution and set timer to 8 hours
5-9 Found PH at 6.7 this morning. Probably because I used the new nutrient solution to rinse the hydroton from the top yesterday. New PPM meter shows 550, lowered PH to 5.9 (needed more than 1/2 tsp PH down) Roots look great.
5-11 found RH at 38% dammit. Clear signs of stress to match. Humidifier and swamp cooler both ran out of water 4+ hours, my bad. Leaf to air delta was 5-8 degrees. They'll recover by the end of day. I'm double checking the notification systems. Lowered lights to 30 inches, increased intensity 22k lux
i) 5-11 slight curling of edges 4 hours later....lights too intense. reduced intensity to 18k and added 'end' lights.
5-13 Humidifier ran out AGAIN and I missed the notifications. RH was as low as 37% for a few hours. estimated VPD was 1.5+ - More stressed edges. LST - *1st internode is now same height as top. Heat is causing the humidity to be vented out quickly. Its possible the heat from the end lights is a net loss (especially if I keep running too arid)
5-14 Lowered light intensity (16k) and ran RH all the way up to 70% for most of the day to destress these girls (brought VPD to nearly 0). They look fine now. As in the past, this strain seems more finicky than other autos I've grown. Turned off end-lights and 2nd fan too.
5-15 75 degrees 60% 16k LUX @ 1-2 degree leaf delta (low VPD) is about the best I can do at 550 ppm. If transpiration picks up I start seeing stress. (uneven leaf color, edges curl). It seems I can continue to run low VPD at 550 PPM or remix lower concentration solution and try higher VPD. Right now, not all these leaves are transpiring (some are @ or above air temp). So... I am struggling to keep old growth transpiring without stressing new growth. I'll mix the new solution @450 ppm, turn up the lights and lower humidity and see what happens.
Did a top down rinse with 2 gallon Florakleen @ 1 tsp/gallon then 5 gallons RO water. Turned lights up to almost 30k. Going with higher PH and lower mobile/immobile ratio as I lower the VPD to push these ladies to the max. I know they are touchy but I want to max light and VPD for a good yield. They may curl up and fall over in a few hours...Had to clear roots from drain shield. This is going to be a problem post SCROG.
*I saw leaf/air delta as high as 7 degrees when I had the tent open for a while and the RH went into the 40's -good thing it was RO water. I found a few leaves at 78 degrees so I decreased watering interval to 4.5 hours from 6
5-16 Found PH at 6.7 ->added 1/4 tsp ph down and recharged PerfectPH. PH=6.4 now. So far, so good with new neuts and 30k LUX. Plants' structure are perfect and should SCROG well.
5-17 So far so good with the push. Growth has clearly accelerated. They aren't happy about it. 78F air 74F leaf 55% RH VPD=1.07 ppm=525 PH=6.3
5-18 *Started 24 hour light. estimating 36-48 bud sites per plant. LST is coming along nicely. I'm still not sure if I'll have to use a screen. Transpiration is providing most of the humidity now.
5-20 Changed water interval to 2 hour from 4.. They are now a couple days into their stretch. 24 hour light seems better in terms of consistent growth and less stress. 1st pistil visible yesterday.
5-21 Found PH at 5.3 again -worried about an infection. Added Hydroguard (2ml/g). Removing excess heat has been as issue. Roots in the drain has been an issue. LST is going well but I'll end up having to use a screen.
5-23 Added net, minimal defoliation. I hate growing GSC. I had almost 300 ppm disappear in 48 hours with VPD right at 1.0 (with expected stress) -crazy. Right now ppm=580 ph =6.3 74F 65% <25k LUX= no stress. This is about all they can handle, no wonder GSC is a low producer. (free seeds)
5-26 The weather has changed enough and the plants are transpiring 1+ gallon daily so that I can no longer achieve VPD targets. I'll soon be Installing a split head AC into the tent room. 78F 65% seem to be about the best I can do right now. Very minor defoliation, I've pinched a couple sites that had no hope of reaching the canopy. I may not reached LST goals with the runt pheno...I've been topping off with <500 ppm low N
5-28 AC installed - VPD now under complete control -growth has exploded. New Nuets early bloom mix @ 485 ppm (700 was too high). Growing @ 75F 50% and watching closely. Raised main light, added side lights, most of the canopy is only at 25k Lux. I am boggled by the need for super low nuets and lighting...almost as if this plant evolved in Siberia... ;]
5-29 topped off with RO water and brought ppm down to 370. I'm seeing new burn on tips...WTF
5-31 ppm under 500 seems best, they are transpiring 2+ gallons a day. running out of time, the runt plant may not fill its side of the screen -they are at the end of their stretch. Been seeing wet leaves so I adjusted fans. 75F 50%
leaf temps at 68-70F VPD right around 1.0
6-1 The canopy is very dense. I'm trying to defoliate as little as possible on this grow but airflow is definitely restrained. Occasionally, I've been manually blasting the canopy with a tower fan to dry out wet leaves. First sign of resin but no stalks. This has been an experiment to see how 24 hour light effects flower development. I'm was expecting to see more resin than this and stalks at this stage...maybe autos DO need a little darkness...
6-2 *20/4 light cycle started. I think I should be seeing more resin at this stage. I was set on flowing at 24 hours as an experiment. I'm now seeing Calcium deficiency in new grow which tells me I've over titrated CalMag and the plants are further along than I thought.
6-3 New Nutrients. Used Light feed mid-bloom mix. ppm=700. I recall adding CalMag after a couple Macro amends instead of right after Silica last time and I think that MAY explain Cal deficiency or it could be too low mix and they are borrowing from the bank. Where's the resin!?
6-4 PPM=500 Where did those (200ppm) nutes go? Hungry bitches. 1st major pruning on sub canopy tertiary today but there is plenty left to do. Still not seeing resin as expected. Stretch is almost over.
6-4 ii) Added 1 gallon RO + 2 tsp CALMAg and 1 tsp DiamondNectar ppm was 800. After 1 feed reservoir is at 530. Added PureUV on 2 hour timer lights hour 11 & 12. Tomorrow's top-off will bring back to 700. These girls are robbing the bank.
6-5 Damn near wiped out this grow! Apparently 1 tsp of DiamondNectar and 2 tsp CALMAG (Humic Acid) and exceeding 1.0 VPD with that 700 ppm mix cooked these ladies. I misted the canopy, dimmed lights and added some RO water. It seems like they arent getting worse but damn. I don't think I'll ever try to use Humic acid for increased mineral uptake EVER again.
6-5 New Nutrients. 20/20/25/40/50
ppm=609
ph 5.5
6-7 (50 days) 3 days post disaster, they are still in ICU. Still running very low light, diluted reservoir to 500. I'm still not 100% sure there was a single factor other than wimpy ass genetics. I mixed the strongest solution they ever had (but it was only 700), I added a little calMAG and 1 tsp of DiamondNectar just before noticing the stress. I completely flooded plants with a top down FloraKleen and then top down RO water and then increased watering frequency! On top of that I had the VPD pushing pass 1.0 hard on the tops. So they got drowned and then slammed with nutrients -Nuked em'. Most of the canopy is actually OK but it looks BAD, they stopped transpiring completely for a couple days and they smell like death. I think we're back on track tomorrow with full lighting and VPD. I Only have 3 weeks left to try and fatten these tops.
6-9 Back in business- transpiration has almost recovered fully and new growth is apparent. Full light, VPD=1, PPM around 500. I lost about 10% of the canopy and several days of growth. The recovery period in low light caused 1 plant to stretch like crazy - might be a good thing? makes me wonder...could lowering light for 3 days in the middle of flower lengthen colas without losing yield?
6-11 These girls have BIG plans. I've removed dozens of lower tertiary sites. Been topping off with .5 tsp CALMAG .5 Micro .5 Gro .5 Bloom .5 kool bloom and diluting to 500 ppm. Where the VPD is higher than 1 (where plant is dryer and more light), I'm still gettin a touch of nutrient burn. 2+ gallons daily. No sign of root bound problems, 10" netcups ftw!
6-15 [58 days] added 40 ml floralnectar
Found one drain packed with roots. Hard to say how long this plant has been getting 'weird' watering. This is the plant that stretched to the moon and showed the most stress as well. Makes sense -when I did a top down florakleen flood, it didn't drain as quickly. Its been dropping fan leaves daily. I managed to replace the fitting at the bottom of the bucket but with a SCROG at this stage it was really hard to get to. The root zone has insane mass, I think having 1/8 inch not draining matters too much to ignore for the next grow. I Also need a way to monitor root zone moisture level for more optimal feed intervals. Pistils are turning, trichs are getting cloudy and they're getting their autumn look on. Too bad I nuked em a while back.
*It still feels like 500 ppm at VPD 1+ is plenty for these gals. New pistil growth has slowed dramatically but I need a couple more weeks if I'm to harvest a decent yield. I've played with a higher VPD but they don't like it. I've been topping off without FloraGro (which is mostly nitrogen). I have been topping off with CalMag every time now and no deficiencies are showing on new growth. I should have been using CalMag on top-offs all along and I would have avoided my troubles. Live N Learn.
6-19 Almost no amber Trichs yet and plenty of fresh pistils. No obvious signs that UV is helping. May not be enough time to develop all these tops into colas...
6-23 The other drain was plugged with roots. I never had this problem until this grow. It seems changing inlet fittings (with screen) and using a weaker pump was a bad idea.
6-29 *70 days VPD is maxed with 35% and 80F+ Still a day or two away from full harvest. Topping off with only water now (3+ gallons a day). I've started harvesting a few of the top buds that were ready. They're hanging @65% 72F
7-4 harvest complete @76 days. The few buds that are dry but not cured are powerful and tasty. Hanging at 67F 65%
* ridiculous root balls
The 1/8 of standing water at the bottom was a problem as expected. Clogged drains and wet roots -I won't use those fittings again.
*huge difference in these two plants. Might have been pheno but could have been rootzone disparity. The plant that clogged the drain first also stretched to the moon and matured later.