Hello everyone! This is my 1st coco grow ever. I’m using canna coco + Jacks, will be following the GreenGenes schedule for the most part. Growing Fire OGxMendo Purps and HeadbandxChem91.
06/28 - paper towels
06/30 - all went into solo cups with coco presoaked with full strength jacks.
My tap water comes out at 0.8EC (587ppm on .7 scale) and when I mixed full strength Jacks to pre-soak coco, it was 3.4 EC (2471ppm). I hope I don’t mess this up, don’t want to burn em from the get go.
07/05 - they got their 1st feeding, I diluted the full strength Jacks by about half; came out to EC: 1.8 (1273ppm on .7 scale)
Any input or recommendations are greatly appreciated!
They’re doing ok so far, i think it’s around day 5 or so above ground, they’re starting their second set of true leaves. Coco still has some moisture, might water tomorrow depending what the surface looks like. average temp 78F, avg. RH 65% .
Tagging @skippyisnohippy
You’re seedlings look great! It seems our hatchlings are very close, I think you got a 1 day head start on me. While I think I’ve been using a different scale for ppms than you, My Jacks solution usually comes in at 2.0 EC or might get as high as 2.1 or 2.25, but I’m using well water and the tds of my water starts out right at 100 ppm on the .5(?) scale (I think). Thanks for tagging me in!
I appreciate the reply, I am a bit concerned about the high ppm due to my crappy tap water, but it is what it is. Hopefully they can handle it and it won’t affect them/cause issues down the line when they’re bigger and need more food. I’m considering foliar feeding Epsom in veg to free up some ppms when feeding at the root level.
@TLC I hope mine look half as good as yours at day 8! If you have any pointers about feeding with Jacks using crappy tap water, it’s always greatly appreciated; this is all new to me
My tap water comes out at 0.8EC (587ppm on .7 scale) or a bit over 400ppm on .5 scale. I do suspect it has chlorine in it, but I always let it sit out 24+ hrs before using it.
yeah, i presoaked with full strength initially (look at 1st post in this thread for all the details + numbers), planning to follow the greengene’s schedule mainly to avoid nitrogen toxicity later in flower.
My main concern/question is can I still feed according to the above schedule with such a high EC without it affecting the plants?
It’s possible that you might be able to find out from your municipal water source what the minerals are or whatever is in your water. If so, I would think that you could adjust the recipe down to smaller quantities of the individual parts of Jacks. Now I know very little about this hobby, but I would bet that someone here would know a good way to adjust it. I think diluting it the way you did is on the right track. If it were me, I would probably try mixing some up at a 3/2/1 gpg instead of 3.6/2.4/1.2 and check the ppm. It’s not like that would be expensive, just a little time involved. I think most people using Jacks on here have a similar EC number like I’m ending up with, around 2.0-2.25. Definitely ask some of the folks that are smarter than me about it.
That’s a very valid point, I’ll see if I can find out more info on what’s exactly in the water. From what I’ve read, usually what makes water hard is extra calcium and magnesium, which I wouldn’t think would negatively affect the plant, since it needs good amounts of it anyway. I’ll try mixing up a gallon at 80% strength (3,2,1) tomorrow and see what the numbers look like at that level.
@imSICKkid i’ve read all your journals and know that you’re an avid jacks321 user. If you have some time, would you be able to shed some light on this for me please?
With a tap source at 587 plus the jacks at full strength seems like the PPMs would be around 1500 or a little less. Have you looked into an RO or different filter system? Seedlings are looking great by the way and welcome to growing in coco🤟
@OGIncognito as per my 1st post, the full strength mix comes out to 3.4 EC (2471ppm on .7 scale). Diluted to about half comes out to EC: 1.8 (1273ppm on .7 scale).
I’m using the HM Digital COM-80 TDS/EC Meter.
As for RO, I’ve looked into it but currently I’m on a tight budget, so that’s outta the picture for now.
So far so good though, I’ll probably go 75% strength on next feed and go from there. Will post an update today or tomorrow with new pics.
1000ppm would be right under half strength for me… no idea how that would work in my case. We will see. Thanks for all your input, I’ll keep it in mind going forward, ill be sure to update the journal to keep track of how they react to specific ppm #s
The 1000 PPMs is pretty much the norm Growmie using the 500 scale, not sure how that correlates to the 700 scale but wouldn’t think 200 at the most . I’ve had toxicity issues above the 1200 range in coco
Surface was dry and cups were light, so I gave them 3/4 cup each with about 62% strength solution, EC: 2.1 (1053ppm on 0.5 scale, 1497ppm on 0.7 scale). PH 6.0. Got about 10% runoff. They seem fine so far, here’s a pic:
Mixed up 1 gallon of Jacks at 3/2/1 ratio. Fed 1/2 cup each, no runoff. PH 5.9. EC: 2.2 (1138ppm on 0.5 scale, 1634ppm on 0.7 scale). I have 1 fan blowing on them now to strengthen stems but 2 of the HBxChem91 needed propped up. Will install another fan tonight. So far everything’s going great, really enjoying how cheap and efficient Jacks is to mix. I think it’s day 9 above ground.
