Scrubs guide to COCO fertigation

NotAquaMan

In Bloom
OK been busy lately but figured I would post this here also for those interested in high fertigation COCO and unlocking the fastest growth rates, keeping the PH, PPM and optimal rootzone conditions. I haven't gone into temps, PPM, PH etc at this point but if ppl like we can discuss.

Before we start this is DTW (drain to waste) and yes it is wasteful.

So first off COCO is NOT soil. For best results we want to keep it saturated between 90-100% that does not mean you can't go below this but you may see slower growth or nutrient issues over time if your consistently letting COCO get to dry.

Coco has an amazing gas exchange and air holding capacity when compared to soil. For this reason it is next to impossible to over water. Over watering is NOT to much water... its lack of o2. You will see this in soil with less drainage but because of coco's high drainage, air holding capacity and gas exchange its highly unlikely to see this in coco.

I do suggest if growing in more than 1 gal pots to add perlite if you are seeking faster grow rates. However if you want to water less often then you can eliminate the perlite as this will lower the drainage. As a rule of thumb:

1gal no perlite
2gal 20% perlite
3gal 30% perlite
4gal 40% perlite
5+gal 50% perlite

You can do more or less but it will affect the frequency of watering required. More perlite the more frequent you will have to feed.

Coco has a low CEC (cation exchange capacity) so it does not hold onto nutrients as well as something like soil so we feed with every watering to keep a balanced nutrient ratio, ph and ppm in the coco. To do so we also need to flush out some of the last feed with each feeding to prevent a nutrient buildup which can affect all of these. THINK OF COCO AS SOILESS... much closer to hydro and very similar to rockwool.

I won't get into ppm in detail as thing will change quite a bit from grow to grow depending on many factors. But generally speaking start at around 300-400ppm and work up to around 800ppm. Now some may need to alter that as it will depend on your specific grow conditions.

HOW OFTEN DO WE FEED!!!

Ah the always debated subject.. 2 times a day, 1 time every 2 days, 10 times a day????

Forget that nonsense... like I say each grow is different so we need to use a better method. Let the plants tell you!!!!

Ok here is how we calculate it simply to your specific grow conditions, stage of growth, pot size and every other variable. You will never need to wonder am I feeding to much or to little again.

The formula:

1.Feed 5% of the pot size as your nutrient solution.
2. Of that we want 10-20% to come out as run off.
3. If you get more you can lower the frequency.
4. If we get less we need to increase the frequency and for that feed we need to add more to get our run off.

So I will do the calculations up to 5gal below to save you all some time. Feed the amount listed and check to make sure you get runoff of the amount listed from there adjust to dial in the feedings as they will change as the plants grow.

REMEMBER THIS IS A GUIDLINE AND NOT A HARD RULE. Our goal is to get as close as reasonably possible. It's not gonna kill your plants if its not exact.


I'm gonna round up.

1gal. Feed 250ml get 25-50ml of runoff

2gal. Feed 500ml get 50-100ml of runoff.

3gal. Feed 750ml get 75-150ml of runoff.

5 gal Feed 1litre get 100-200ml of runoff.

By doing this your plant will tell you how often you should be watering for best results.
 

Jewels

Tilts at Tables
I think I am following along.
So, if I have a 2 gallon container of coco, I should never water it more than 1/2 litre at a time.

your plant will tell you
By way of runoff, in this case ?
Like, if I took that original 500ml and distributed it across the media and had 250 ml returned to me ,, that means I watered again too soon?

And by the same reasoning if I put a half litre in the top and none came out the bottom I have waited too long to water.

Not to put words in your mouth but ,,, in a roundabout way of thinking,
[Focusing strictly on quantity and frequency,,,]
I could successfully/ideally/properly water a crop , without ever looking at the canopy.

Am I picking up what you are putting down ?
 

NotAquaMan

In Bloom
I think I am following along.
So, if I have a 2 gallon container of coco, I should never water it more than 1/2 litre at a time.


By way of runoff, in this case ?
Like, if I took that original 500ml and distributed it across the media and had 250 ml returned to me ,, that means I watered again too soon?

And by the same reasoning if I put a half litre in the top and none came out the bottom I have waited too long to water.

Not to put words in your mouth but ,,, in a roundabout way of thinking,
[Focusing strictly on quantity and frequency,,,]
I could successfully/ideally/properly water a crop , without ever looking at the canopy.

Am I picking up what you are putting down ?
Exactly just adjust the ppm and ph to your needs. This way will help keep the ppm and ph stable in the rootzone with little to no fluctuations
 

Inferno Mike

In Bloom
I've been using the CocoBliss blocks lately, consistency has been good so far, ordered 4 more of them. I do have to rinse it pretty well, but not as much as other blocks I've used. I hydrate it, rinse it with tap water, let it dry somewhat, then mix in about 1/4 to 1/3 the volume in perlite. Then I rehydrate it with CalMag at 150ppm, and my regular nutes at 200ppm - for an 0.7EC solution.

I miss the days of pouring Royal Gold Tupur straight from the bag into the pots, but the quality seemed to go to heck a couple years back, and I switched to DWC.

Tupur was very convenient, I wonder if they recovered from that dip in quality. I wasn't the only one who noticed.
 

Kold Kasiz

In Bloom
Which brands of coco has everyone had consistently good experiences with?
Ima fan of Botanicare Cocogro bricks. They have less salts and are noticeaby cleaner and bug free. That is the only brick brand I’ve tried that I don’t have to flush the salts from. Mother Earth bagged coco also had some good reviews by a few guys here. The other brands will work, you just need to flush with excessive water before using and have a good ppm meter.
 

Inferno Mike

In Bloom
Ima fan of Botanicare Cocogro bricks. They have less salts and are noticeaby cleaner and bug free. That is the only brick brand I’ve tried that I don’t have to flush the salts from. Mother Earth bagged coco also had some good reviews by a few guys here. The other brands will work, you just need to flush with excessive water before using and have a good ppm meter.
I've used that too. Very good stuff, but not quite worth the price difference for me, personally.
 

jaguarlax

Tactical Gardener
Staff member
Moderator
Which brands of coco has everyone had consistently good experiences with?
I really like using Fox Farms Mother Earth if I can get it for a decent price. I’ve tried a few different brands of “brick” coco from Amazon and eBay vendors, but the quality just wasn’t the same. I noticed that some of the bricks had a lot of dust and finer particles.
 

OldG

Elite Hobbyist
canna bricks....come with a bag and easily separate into 2 1/2 gallon pieces.

Botainicaire is a better value....a bit more of a pain to soak becacuse its a 10 gallon piece....coarser texture than canna but not bad...just bigger pieces.

I do find canna is washed better...quick soak of 1 brick in a 5 gallon bucket with 20ml of calmagic....soak drain...use...easy

And thanks for the info about coco...it got me thinking about it more logically...up to 2 feeds per day x 15 seconds each (half gallon per feed over 6 plants) on the floraflex small coco pots.. Working good. Will move it up to 3 in a week or so.
 
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Burned Haze

In Bloom
brand choice i choose and love:Royal Gold Tupur
for coco indoors I’ve ran 1 gal runs with 30-40 on a 4x8, 8-25 5 gal, 220 gallon each 4x8 square smart beds and city pickers 15 gal (first run with them)

tupur for the price and quality is def my favorite choice and anything from that brand appears and shows to be prime . locally and current price is 12-20 bucks per 15 gallons (2cf)



tip for re-using coco

To guratee your salt and pk boosters or anything not wanted in veg after the first cycle, inless super soiling and to properly re-using your medium ( exp coco) this is my procedure I do.

1.last 2-3 weeks before harvest flush with seagreen , no more additonal microbes like p intakers or mykos besides em1 and or seagreen would be a good valuable decomposed microbe and great breaker downer . I would also apply pond zymes (16,000 gals xan be aplied for 25,00 bucks ) or any enzyme that’s on your choice list . 2. Repeat this combo every watering , once your 3-7 days before harvest. It’s better to have a little dry than super wet at the harvest date/end. 3. So I would stop watering if that plant normally wants it everyday-2nd days Water feeding cycle. If it was me I would Stop watering 2-3 days before harvest and harvest in the dark ( green lights is how I do it Np)

when removing the previous plant, just cut the plants main stem and take the stem out by cutting it in a circle. Than beat the stem that has coco/medium in intill you get 75%+ off. no reason to lose that middle spot on a small pot-10 gal pot when it won’t hurt the population that bad if you just cut out the stem as little as possible and beating the coco out of the roots.

seagreen: the best salt water + lowers your over all ppm and many things for use of only 1ml per gallon and all-in-one foliar .

EM-1: awesome microbe and very easy to make and cheap.great for cleaning bathroom,floors, your stomach , compost , great foliar and wonderful drench that does so many things.

Pomd zyme : up to 16,000 gal treatment + enzyme feed (barley), I apply 1-4x of what is rated and every Rez with great results . I’m good on hydro store versions lol

https://www.amazon.com/dp/B000OVCI2S/ref=cm_sw_em_r_mt_dp_uNa5Fb8RMQKEW?_encoding=UTF8&psc=1
 

Smokieokie

In Bloom
I'm using pro-mix right now but switching back to coco soon. Going back to Deep Roots cross country lite. Was really clean when I used it before, just a tad better than M.E. ime. If your into buying bulk they will craft it to your needs to which is nice.
 
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