Post-harvest reveg of UK Cheese
This is not your typical grow journal. After finishing a personal-best grow of UK Cheese clones, I decided to try my hand at a full post-harvest re-veg of a couple of plants to see if I can get them to produce enough to get some cuts for clones. I didn't have any room in a tent to take cuts and reveg them earlier in the grow, and I didn't leave much in the way of branches that I could cut and reveg now.
Day 1: I left some branches with small flowers on two of the plants, cleaned out my 120x60-cm (4x2-feet) tent, and moved the plants into there. I setup the auto-fertigation system with high nitrogen early veg nutrients, set the light to a light/dark cycle of 20/4 hours, and hoped for the best!
Day 3: Not much change. I had to adjust the fertigation time a few times to get enough outflow without wasting too much nutrients.
Day 12: Is it possible that those are tiny new green leaves starting?
Day 16: Yes, those definitely are new leaves growing at the top of one of the plants! I am going through a full 50-liter reservoir each week, so this has been quite the effort for those tiny little leaves! Let's hope the rest of the branches get the same idea soon.
Day 17: A few more branches are starting to set new leaves
Most of this new growth includes some floral parts, so it hasn't completely revegged. If I had a third tent, I would be tempted to put one of the two plants back into a 12/12 light cycle and see if I could get some rodelization to occur and convince the plant to make some staminate flowers and pollen. It would be interesting to see if S1 seeds from this cut would keep the yummy UK Cheese traits or revert. Maybe another day.
Day 18: I pruned off the old half-dead fan leaves to avoid getting any disease problems.
Day 20: Starting to get some true vegetative growth, with new leaves unfurling without any signs of pistils or calyxes.
Day 21: Three full weeks after harvest, and UKC1 is definitely starting to reveg. UKC2 is thinking about it, with some odd little furled up leaves that haven't quite opened.
Day 22: Growing nicely. All of the leaves are expanding and looking healthy.
Day 23: Noted some mold or mildew of some sort on the surface of the coco, but only near the rim of pot where the hydro halos don't reach. Drenched the soil with dr zymes. If that doesn't knock it out, I'll see about scooping out some of the coco and replacing it with fresh. It is just a few small patches, but it looks nasty in the microscope!
Day 24: No sign of the mold. I'll keep checking. Still feeding about 1150 EC early veg nutrients at 6.10 pH. Outflow EC is 1377. Everything is copacetic, and I'm loving the crazy leaves!
Day 25: G4r 27°C 60%
Day 26: G4r 26°C 67%
Day 27: G4r 25°C 67% Found more fuzzy mold on the surface of UK2. Removed top layer of coco on both pots and drenched again with Dr. Zymes. Rinsed drain pan.
Day 28: G4r 25°C 68% I realized that back when I first found the mold in UK2 on Day 23, I had turned off the valve to the hydro halo and never turned it back on again. She was already pretty stressed, and 5 days with no water or nutrients certainly added to that! So, starting tonight, UK2 will get a #5 nursery pot over her head, to give her a full 12-hour dark cycle (with light leaks). If that doesn't causes her to make some stamens, I don't know what will! (Well, I know silver thiosulfate would for sure, but I don't have any. I may have to order some.)
Day 29: 🇬🇧🧀#2 spent the night with a pot over her head for 12 hours. My goal is to stress this plant even further and force it fully back into flower, hoping that the process of rodelization may lead to some stamens and pollen production.
Day 30: G4r 23°C 68%. I removed many of the old browning flowers from 🇬🇧🧀#1 to try to avoid any mold or bud rot. It's hard pruning off the dead parts without also cutting the new leafing branches. I'll keep at it a bit at a time. I may actually see if there are any trichomes left on these flowers and dry them. I've never had flowers that ripened this much!
Day 34: 25° 74%
I gave up on trying to get 🇬🇧🧀 #2 to make some stamens. All the pot was doing was cooking the plant.
Day 39: 23° 69%
No sign of any mold, and the plants are growing great.
Day 45: 24° 72%
These plants are getting too big! I need to take cuts soon and then flip the bushy one.
Day 47: 24° 73%
Took 18 cuts from UKC2, cut through nodes with a new razor blade, dipped them in fresh aloe vera and then Bontone rooting powder and placed in the Oxy Clone hydrocloner.
Day 49: 22° 70%
I removed 🇬🇧🧀 #2 from the tent and moved 🇬🇧🧀 #1 to the center of the tent and installed a scrog net. She is way too tall! Once she stretches, I will not have enough height in the tent.
So, I lowered the net down as far as I could and trained the branches out to fill as much of the tent as possible.
Tomorrow is flip day, so she has 24 hours to recover from this not-quite-low-stress training! I'll keep pulling the branches to the sides during the first part of the stretch. My goal is to fill the entire tent with one plant.
Day 50: 24º 68% Lights from 18/6 to 16/8.
Look at how well she is recovering after just a day! The leaves are growing above the net already. I pulled them out a little further to try to fill the rest of the tent.
Day 52: Lights to 14/10. Filling out the tent, bit by bit.
Day 53: 27º 60% lights to 13/11.
Day 54: 26º 69% lights to 12/12.
I really understand now why they call this "monster cropping." I am so curious to see what she does now that I have fully flipped the light to 12/12. Will she stretch? How long until she starts popping pistils again? Will any of these branches make anything approaching colas, or am I looking at a sea of larf?
Day 55: 21º 55% Added Bacillus amyloliquefaciens strain D747 to reservoir.
Day 57: Temps in tents were 10ºC this morning! Apparently, after I turned down the heat last night when it got too hot, I forgot to turn it back up. Looks like my grows survived just fine, though. In fact, this one is getting out of control. I think some serious pruning of those lower branches is in order, so she can focus on filling the canopy and stretching tall.
Day 58: 24° 63%
This is out of control. I need to get this pruning done, but I don't know when I'll have time. I snipped a couple of the most obvious branches off the bottom. If I had more room in my cloner, these would have been perfect cuts to clone. I guess I will just keep working at it a bit at a time, when I can.
Quick catchup post.
Day 58 through Day 62. Still on transition nutrients.
On Day 63, first pistils appear! Switched to early bloom nutrients.
Days 64 to 66. Stretching every which way.
Day 67. Pruned more lower branches from reveg. She is really filling the tent.
Day 68 to 71. Pruning another peck of branches pretty much every day.
Day 72. While pruning some more lower branches...
...I noticed that the upper leaves looked a bit odd. I pulled out my microscope and was horrified to see what was crawling all over them!
Spider mites! I turned off lights (they had just come on), sprayed throughly with Dr. Zymes, let leaves dry, and turned the lights back on. Then I cleaned the drain tray, tent walls, everything. I repeated this in my other tent, even though I did not find any sign of mites or eggs there.
I also called all the people I had recently given clones to and gave them the bad news, as the clones were infested even worse. After thinking about it, all I can think is that the old bag of Pro Mix that I brought in from the barn to pot up clones for distribution must have brought the mites in and they spread fast.
Day 73. The next morning, I turned off all the lights in the lung room, opened the tent during lights off, and checked the leaves again with the microscope. Although most of the mites were dead or dying, there were still plenty alive, so I sprayed with spinosad insecticide (Captain Jack's Dead Bug Brew) and closed up the tent.
In the evening after lights on, there were still just a few barely moving mites, so I did a second dose of spinosad, making sure to get both the top and bottom leaf surfaces.
Day 75. Apparently, I forgot to refill the reservoir while dealing with the mites, and the coco was starting to dry out. Refilled the res, and though I saw no moving mites, I gave one more spray with spinosad. I will keep an eye on this in case any eggs survive long enough to hatch. I have to get this dealt with fast before the flowers really start growing, so I don't end up with spinosad in my flowers! I'll be spraying well with water next week to wash off any residue.
Day 77. Still no sign of live mites. I pruned off many lower branches, trying to get rid of anything that won't make it to the canopy and improving airflow in preparation for having to rinse off the spinosad once I am sure no more eggs will hatch. No matter how much I prune this monster, she just keeps getting bigger!
Switched to mid-bloom nutrients. She was still looking a bit shaggy below the canopy, so I pruned off another batch of larfy branches. Above the canopy, things seem to have pretty much recovered from the mites and the flowers are getting a lovely buttery yellow cheddar color.
I found one slow-moving but living mite during one of my regular sweeps with the microscope. I hate spraying spinosad when the flowers are already developing, but really don't want another infestation, so I thoroughly doused the leaves on all sides. I'll have to rinse the flowers in a few days with fresh water to remove any spinosad residue. Despite its low toxicity to humans, I don't want anything in my flowers other than what the plants produce!
I think I have almost removed all the larfy lower branches, and the flowers are looking good.
Day 91 (29 days since first pistil)
No more mites. I haven't figured out how to rinse the buds well without causing a huge spike in RH in the lung room. I think I need to setup my portable aircon first so I can use it in Dry mode.
Ever wonder what the stem of a cannabis plant looks like if you start it as a cut in August, grow it to harvest in December, reveg in January, and then keep growing it until April? Pretty gnarly. Up above, the flowers are looking good, but there are just so many that almost none are forming colas. Trimming is going to be a big job, but I'll probably end up just ice-water washing and sieving a fair amount of them for hashish.
Switched to late-bloom nutrients, so should start seeing some bulk adding on soon.
Day 105 (43 days since pistils)
And now onto the 2nd half of late-bloom nutrients, but already bulking up nicely. I keep cutting out more small branches but the jungle can not be beat back. There's enough weight on the flowers that they were dragging the branches down, so I've started raising the net to provide some extra support.
Day 110 (48 days since pistils)
Trichomes still cloudy with some clear, but the flowers are expanding. It's hard to describe any of the flowers as "colas" since this monster just has too many flowers for it to really put much into anyone, but they are still nice and dense.
Day 113 (51 days since pistils)
Switching to Ripen nutrients. Time to finish up this grow.
Day 116 (54 days since pistils)
Even though it has only been 3 days on Ripen nutrients, the first amber trichomes are already starting (although only on the top flowers). So, I topped off the reservoir with plain water and adjusted the pH. This brought the EC down to 202 µS/cm, so I am considering this the start of a long flush. I am harvesting the other tent this weekend, so it will likely be another week before I can harvest this one.