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Coco Nutrients AutoFlower

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Sub8
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Hey everyone, been a while since i was on here. hope everyone is well and safe in these tough times.

Im trying to get a rough nutrient schedule together for my auto flower, but its frazzling my brain trying to reduce it down.

I know you have to be quite delicate with autos.

I'm using Canna coco 70% perlite 30%

Products I've got - Canna rhizo, Canna A&B, Canna PK13/14, Canna Boost, Canna Calmag, Liquid seaweed (Believe its good for the roots and Budda Tree Silica (recommended by Macky).

Seedling Stage -

Veg Stage -

Flowering Stage -

Hope someone can help.

Many Thanks 😀 

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Topic starter Posted : February 3, 2021 1:42 pm
LaughingDragon, Old hippie, Chillbert and 5 people liked
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monkeydo
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In coco I just start at 1/4 the recommended rate and use the EC in and out method to find what the plant wants/needs. Mix 1/4 recommended rate and take the EC reading. Measure the runoff and raise/lower the feed as needed based on the runoff numbers.

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Posted : February 3, 2021 3:02 pm
Wrh, LaughingDragon, Old hippie and 6 people liked
Sub8
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@monkeydo thanks for the reply, going to get a ec meter hopefully next week. Money has been a little tight. During this pandemic! 

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Topic starter Posted : February 3, 2021 4:59 pm
LaughingDragon, Old hippie, Doctor X and 3 people liked
monkeydo
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@sub8 pandemic has hit lots of people and families hard. Start with 1/4 and if you see deficiency increase just a little at a time. It’s like walking through a room in the dark, if you go slow and are careful you do just fine. Post pics if you have issues and we will try to help.

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Posted : February 4, 2021 12:09 am
LaughingDragon, Old hippie, Hart and 5 people liked
Sub8
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@monkeydo thanks for the info, just ordered my Essentials EC pen with calibration solution. So should be with me next week. 😀 

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Topic starter Posted : February 4, 2021 9:17 am
Wrh, LaughingDragon, twisted1 and 5 people liked
JSH1973
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You have it fully covered with Canna rhizo, Canna A&B, Canna PK13/14, Canna Boost, Canna CalMag... No idea about the seaweed

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Posted : February 4, 2021 4:12 pm
Old hippie, Woolie, monkeydo and 4 people liked
Sub8
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 @jsh1973 should defo have it covered with the nutes and once the ec meter comes it should hopefully all fall into place. Fingers crossed. 

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Topic starter Posted : February 4, 2021 6:28 pm
Old hippie, Woolie, Hart and 3 people liked
Sub8
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Hey everyone, finally got my head round my EC. 
I’ve just watered with a very light mix of silica, rhizo, cal mag and canna a&b. Before watering my ph was 5.7 and EC was 0.7.

just tested the run off and ph 6.5 and ec was 0.2.

im 13 days post germ. Auto. 

what steps do I need to take to get medium to appropriate ec and ph. 
cheers 

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Topic starter Posted : February 15, 2021 12:20 pm
Old hippie, Chillbert, twisted1 and 2 people liked
monkeydo
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@sub8 The output EC is the important number here. It sounds like you have a decent starting EC for the stage of growth and slowly you will get the exact feed strength your wants by comparing the input and output number. My method is to compare input and output EC. The output EC should be within .200 of the input plus or minus, personally I prefer the minus but that’s just me. So if your starting at .700 you want the output to be between 0.500 and 0.900 . If the EC is above 0.900 reduce the input by 0.200 Also, if the EC is below 0.500 increase the EC by 0.200. One thing thing to be aware of is plants can and do compensate for EC so don’t chase these numbers too hard. I give the plant a few days on a particular feed level and if she stabilizes we are good but if the EC is out of range for a few days I’ll make the adjustment and see how she does. One thing NOT to do is to change the feed every day chasing a valve. Your plants will need a little time to make adjustments. After a while you will learn your nutes and your water and you will know approximately what feed level you should aim for by experience and can make adjustments faster/easier but this comes with experience. As far as the output ph, I don’t monitor that in coco unless I’m seeing a problem somewhere. Was told by a different (expert) grower on a different forum not to worry about ph. So far it’s been good advice. Others may have a different opinion and there’s more than one way to grow but this is my technique.

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Posted : February 15, 2021 1:32 pm
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Wrh
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Excellent answer monkey very comprehensive and easy to understand advice I do check my pH run off and if it is low when I ph next time I ph higher eg 6.5 to keep it from going to low we all do things slightly differently but hopefully get there in the end 

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Posted : February 15, 2021 1:47 pm
Sub8, Hart, Chillbert and 2 people liked
Sub8
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@monkeydo hey, my ec is 0.4 before adding nutes, once adding nutes and supplements it brings the ec up to 0.7 so that is a 0.3 difference.

so going in it was 0.7 and out it was 0.2 which is 0.5 deferential. 
I was thinking of doubling my nutes on the next feed, so theoretically it should be a lot closer to the desired amount. Is this right, I do realise that it won’t be bang on. 
cheers

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Topic starter Posted : February 15, 2021 6:48 pm
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The background EC is a little high. My rule is if is more than .300 you should absorb the extra EC into your calculation because that’s going to have an affect on how the roots feed. For your situation add the extra .100 into your calculations

Background is 0.4, 0.1 above limit so add that .1 to the .3 of the nutes and your adjusted input is .4 

Input at .4, output at .2. Your water has some things that the plants like, such as calcium and they are using some of it as well as the canna nutes, that’s real good. You can boost a little next feeding but go slow until you know they are ready for it. Pictures always tell us a lot but from the description that’s how I do the math. Any other hydro growers what to post their balance techniques. I know there are many other ways to do this. Lots out here have more years at this than me, I probably keep my numbers lower than some.

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Posted : February 15, 2021 7:59 pm
Whereistoss, Hart, Wrh and 3 people liked
Sub8
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@monkeydo originally flushed medium 0.5ml of each rhizo canna a & b a day before popping. For the first 12 days just 5.8 ph’d water didn’t have an ec tester till a few days ago. 
the only reason I put the ec to 0.4 was because canna cal mag bottle advised to do it. But if u recommend bring my ec down to 0.3 I will take that advice.

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Day 13 post germ. I personally thought they looked a little yellow/green but it’s still very early days. 

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Topic starter Posted : February 15, 2021 8:36 pm
monkeydo
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The math puts you at the lower end of my formula so you can bump it to .5 and see what she does but they look just fine. Just monitor the output and remember to always give them time to adjust. Your plan isn’t unreasonable at all, as long as you know what to check and how to adjust and you will dial in in no time. My setup is also very different so don’t be afraid to do things your way if you feel it’s for the best. Better to develop a style that works best for you. I run an auto feeder 4 times daily (only in flower) in coco so I can get away with lower EC, feed gets refreshed in my coco very frequently so they won’t starve but low EC means they have an easy time eating. If your plants look good and your numbers are within good ranges your grow will go well. 

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Posted : February 15, 2021 9:11 pm
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Old hippie
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@monkeydo nicely done man   great explanations! 

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Posted : February 15, 2021 9:39 pm
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