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Old 11-17-2020, 11:34 AM #1
stevebe
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New to Photoperiod

Hi everyone,

I've had a couple of successful grows of autos in coco / perlite (80:20)

I have a bulk of photoperiod (fem) seeds and i want to get going on these. As ive never done a photo period grow before i was wondering if anyone would like to share a feed schedule/ amounts with me ?

usually with Autos i just went with the 1/4 the recommended and i didn't really run into a lot of issues. I fed at pH 5.6.

I am aware that photos will require more nutes but there's so much information out there. below are my current nutrients, light and the strain ill be attempting.

BCN critical (Seedstockers)

cocos premium - plagron

plagron A&B
zym root
power root
green sensation
CalMag
I have a mars hydro 600w light and a 1.2x1.2M space.

Thank you for taking the time to read this and i appreciate any advice on the schedule and amounts i should set up.
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Old 11-17-2020, 12:41 PM #2
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I would start with 1/4 the recommended nutrient as well for the photoperiod plants. You can start the plants under a 12/12 and when you get the first true leaves add more hours to the photoperiod. You can work up to 18 on 6 off within the first 4 weeks. Night times are very important for photoperiod plants and keeping them consentant is crucial. .
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Old 11-17-2020, 12:46 PM #3
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You sure your light is a 600W one and not a 90W one?
TS600 has a max of 90W.
https://www.mars-hydro.com/mars-tsw-...led-grow-light

Also, start them in 24 hours of light per day or at least 18 hours of day. Then, when you want them to start flower, do 12 on / 12 off.
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Old 11-17-2020, 12:55 PM #4
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Thats what I'm wondering. Having used those products for quite a while, at 1/4th strength there wouldn't be a green leaf in sight. Even lettuce is grown at higher EC
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Old 11-17-2020, 12:56 PM #5
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This sounds logical to me, i usually do not feed for the first 14-16 days, so i will do this as normal and introduce 1/4 the nutes after day 14?
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Old 11-17-2020, 12:58 PM #6
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Originally Posted by SuperBadGrower View Post
Thats what I'm wondering. Having used those products for quite a while, at 1/4th strength there wouldn't be a green leaf in sight. Even lettuce is grown at higher EC and I am not kidding.

what would you recommend ?
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Old 11-17-2020, 01:33 PM #7
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Hmm it's all relative. "follow the instructions" because Plagron are right about most things. No need to supplement ca/mg with coco A&B. If you use hydro A&B with coco you need to supplement Mg. GS is quite strong, half dose is OK

if I plant seeds here and give them tap water for 14 days, I will for sure be looking at a bunch of crippled plants with drained cotyledons, deficiencies and yellow leaves. But thats because mine get a lot of light. If I put them in a low light situation yeah you can get away with things.
Wouldn't worry too much about it, just satisfy the medium and see where it goes. The plant takes what it needs. If you make feed water 1.2 EC, run enough water thru the coco so the drain EC is the same as input EC, you have effectively set your coco EC to "light mix" levels. Even a monkey can keep plants alive for 2 weeks in a light mix (peat), which all target approx 1.2 EC. With the coco set to 1.2 EC you can put a seed in there and it will grow well. I set my coco to 1.6 EC then I put seeds in, then they grow, and then I smoke the weed.
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Old 11-17-2020, 02:17 PM #8
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Originally Posted by SuperBadGrower View Post
Hmm it's all relative. "follow the instructions" because Plagron are right about most things. No need to supplement ca/mg with coco A&B. If you use hydro A&B with coco you need to supplement Mg. GS is quite strong, half dose is OK

if I plant seeds here and give them tap water for 14 days, I will for sure be looking at a bunch of crippled plants with drained cotyledons, deficiencies and yellow leaves. But thats because mine get a lot of light. If I put them in a low light situation yeah you can get away with things.
Wouldn't worry too much about it, just satisfy the medium and see where it goes. The plant takes what it needs. If you make feed water 1.2 EC, run enough water thru the coco so the drain EC is the same as input EC, you have effectively set your coco EC to "light mix" levels. Even a monkey can keep plants alive for 2 weeks in a light mix (peat), which all target approx 1.2 EC. With the coco set to 1.2 EC you can put a seed in there and it will grow well. I set my coco to 1.6 EC then I put seeds in, then they grow, and then I smoke the weed.
sounds good, ive never used an EC pen but that's not an issue i could use one. Ive just never seen the point in using it when i use a pH meter. The EC will move with the pH as PH adjusters are essentially a saturated salt solution.
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Old 11-17-2020, 02:58 PM #9
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Without calibrated EC measurement you're lost in the woods mate. The amount of phosphoric ph down you need to get to 5.8 increases EC by a marginal amount compared to every other input you listed. Even different batches of A&B can very in strength. 1.5 ml/L of today's bottles can get the same EC as 2 ml/L from tomorrow's batch

EC doesnt tell the whole story, it's not a religion to be at a specific number. Let's say it like this, 1 EC of coca cola does not contain the same stuff as 1 EC of gatorade. But it is the only informative measurement for nutrient strength.

(If you follow the instructions and best practices, in a good environment, you'll almost neve rhave a nutrient related problem. We all mess up sometimes though or maybe a problem occurs. That's when EC measurement is useful for diagnosis)

Last edited by SuperBadGrower; 11-17-2020 at 03:26 PM..
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Old 11-17-2020, 09:18 PM #10
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I understand what youre saying, thank you. However i imagine you use salt to move the ec ? either up or down ? in which case the pH will most certainly move once you start changing this. so i guess my questions now is how do you move the EC without moving the pH ?

if i take my my nutrient solution and its not the correct EC how do you adjust that without moving the pH ? as if im to just dilute that with water that will absolutely move the pH
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