PTGC Architects: Finding Prince Dakkar
I scuffed and soaked 2 seeds today: both Deleted Scene by Cult Classics.
After soaking for 3 hours they sank, and I put them in moist paper towel on the seedling mat in a nice, clean, sterilized tent.
Checked the seeds this morning and bothered were cracked with a hint of a tail starting to show!
One seed went into fine perlite in a 2-oz. party cup with one hole at the bottom and an inner party cup with the bottom cut off and the side pre-cut. The hope is this will make it easier to pot up into the LECA (clay pebbles) when it is rooted without damaging the roots. Kudos to @HPD for the idea!
The other went into a soaked and rinsed coco pellet with the top cut off, because I had to toss my old Rapid Rooters as part of the mildew extermination effort.
Both are in a double humidity dome on a 30° seedling mat in the dark until they appear, and I’ll be keeping the medium moist with distilled water.
24 hours later, the sprouts were just appearing above ground.
The perlite sprout ended up with its radicle exposed and the coco sprout was completely crooked, so I had to reset them when I wiped off the seed coats.
This morning it looked like I missed the inner skin on the sprout in coco, so I wiped that off too.
The cotyledons are ready to open and I turned on the SQ300W Pro at 25% raised to the top of the tent as high as I could get it. The Photone app estimates a max PPFD of about 100 umol/s/m2. Normally I would start with a seedling light but I am too lazy to hang a different light, and 100 umols should be fine for the seedlings. I’ll measure the actual hanging height at some point for my records.
The seedling in coco tried to escape!
So I carefully moved it into perlite and it recovered well.
And here they are in their new homes: a 45L (12-gallon) cooler turned into a DWC res, and a 0,5L (17oz) perlite Hempy Cup
First up is the Hempy Party Cup. I think I abused it too much in the perlite or there was not enough air in the perlite or something, but the first true leaves died before they could emerge.
So, I scuffed and soaked another seed and put it in paper towel on the seedling mat at 30°C. Okay, I missed the step where I put it on the seedling mat and forgot to put the temperature sensor under the pot for the first 12 hours so the temp was up above 34°C and I was afraid I cooked it, but it sprouted a tail after all!
I dumped the old dead seedling and made a new Hempy Party Cup! This time I put the drainage hole a little higher to make a bigger perlite reservoir at the bottom. I wrapped it in foil, put a soft cotton rope from the bottom of the cup to the top, put perlite in the bottom, then coco above that. I planted the seed, tail down, about 5mm deep.
Because the drainage hole is above the top of the jar I use to catch any overflow, I made some little drip guides out of a cable tie, heating the ends with my torch to make little hooks to hold them in place!
And on top the DWC plant! There were o roots poking down so I peeked in and saw that the tap root had gotten trapped. I carefully released it and a couple of days there are little roots feeling down low enough to hit the water!!
and the first true leaves are finally starting to grow so I expect her to take off soon! I think the slow start was because I transplanted it into the net pot too early. Next time I will start in a rapid rooter!
Thanks to everyone for the kind words! Life is hectic, but so far I can say I love this grow. The DWC has been very little work. Basically, I check the pH every night and confirm that it is still stable (it eventually stabilized at 5.7 after the first week or so). And I scoop a little bit of nutrient solution out to water the Hempy cup. That’s it! I know it gets more busy later on and I do need to bring the EC up.
Now that the plants seem established, I started moving the light (still on 25%) a bit closer. The Photone app estimates 250 umol max PPFD right at the leaves, and I’ll be bumping it up gradually to 700 to get this plant to really explode!
Getting bigger! EC in DWC is up to 1050 uS/cm, pH is stable at 5.8, light is now at max PPFD of 600 umol/s/m2, going to 700 tomorrow.
And the Hempy cup is doing great with just one watering a day to refill its mini res at the bottom of the cup.
In any case, DWC had 6 nodes grown so I chopped her back to node 3 to start the mainline.
Just for fun, I dipped the top in rooting powder and stuck it in the Hempy cup. Why? I dunno. And this is photo number 100,000 that has been uploaded to CocoForCannabis!!
Oh no! Looks like I got root rot (pythium).
Since I increased my Photontek SQ300W Pro to 50% power, water temps have been at the top end of what is recommended: 23°C/74°F. Despite all my aeration, I guess something got in there. First step is to wrap the cooler in reflective insulation, something I should have done at the beginning.
I will also toss an ice pack in the water to bring the temps down, and later today I will change out the water in the reservoir and see if I can beat back this with cooler temps and some more beneficial bacteria.
The DWC plant is doing well despite the root rot, and there’s a party going on in that party cup as the top of the other plant that I stuck in there seems to have rooted nicely. Party Cup Extreme Challenge: grow TWO plants in one party cup: one from seed and one clone!!!
Today I finally pumped out the reservoir, cleaned it well, rinsed the infected roots as well as I could, and refilled with fresh nutrient solution, as Enjie suggested.
I brought the res to EC 1215 and pH 5.75, and added both the Aquascape pond cleaner bacteria and the Southern Ag Bacillus amyloliquifaciens. I then covered it in bubble foil with some slits for the stem, as HPD suggested. Looks great!
Quick update: the branches had grown enough past the 3rd node that I was able to top them a 2nd time. I also removed the growth tips on nodes 1 and 2 which I had forgotten to do earlier. The reservoir still looks nice and clear.
DWC recovered nicely from the topping and the 4 new mains are almost big enough to top the third and final time (probably this weekend). With just a week to go until flip, I thing the timing will be fine I expect by Flip Day that this will be about half filling the space.
Hempy Cup seed and cut are doing great too. With that tiny little res at the bottom of the party cup, I’ll need to water twice a day soon. Also, it should help keep the plants small, so they won’t compete with the DWC. Hempy is also only getting about 350umol of max PPFD.
DWC Res temps are staying below 66F/19C. EC is 1200 pH 5.8 aquascape pond cleaner bennies seem to be keeping the new roots white and the old ones aren’t getting any darker.
The plant is growing fast and the leaves are putting on so much surface area that they are wrinkling. EC had sneaked up a bit so I tipped off with low EC water and pH’ed again.
I wanted to get more light on the growth tips, and had to spread the two branches apart. What do I tie anything to in DWC??
I call it the MST PPS, or Stoner Engineering at its finest. How do you spread the branches when mainline training and you are doing DWC and have nothing to tie or stake down to? You need a Medium Stress Training Pneumatic Plant Spreader, complete with Customizable Soft-Ties and user selectable spacing.
Still haven’t completely beaten the root rot, the DWC plant seems to be doing fine, growing lots of new roots and some huge leaves. Res is at 1200 EC and pH 5.8 and 20°C 69°F. I can’t get it much cooler but I have tons of air.
I did the final topping so I now have 8 main branches. I’ll be flipping in three days on Flip Day, so the timing is perfect.
I’ve decided to use a trellis to spread the growing ends apart as they extend. I’ll probably keep raising it as the plants grow.
The Hempy Cup was getting tall, so I topped it and stuck the top in the ground next to the other one that has already rooted! Three plants in one cup! W00t!