First time grow in coco. Wondering about fertilizer?

Yah same here i like to keep a open mind aswell

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Thank you guys for the input! Glad I asked. I will be watering everyday from here on out. One more question. I live on a mountain in Az. Cold and dry. My humidifier gets me up to 50’s when the soil is saturated it will get into the upper 60’s. I am going off 18/6 light cycle. I noticed quick that lights out the humidity went up into the 70s. So k threw it on a timer for only light hours. But I’m wondering now that I am watering daily and my humidity with the fogger will be in the 60’s is that too high? Should I cut out humidity all together? And also in coco coir what ph should I be watering. I’ve been trying to stay at 5.8.

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Wow! Those are gorgeous! And they are grown in coco coir?

Good on you!!
I’m gonna research all your notes for sure.

Are those grown in coco?

Yah its been growing in coco coir

Those look amazing! What is your humidity like?

My humidity is 50% and my temp is 27c to 30c

@13runner high humidity is only a real issue if you are currently in flower. Try and keep humidity below 55 - 50, which is what I shoot for personally. Could probably go higher, but bud rot really sucks and I get nervous. Haven’t had it yet and I don’t plan on it lol.

Using Coco is considered a form of hydroponic growing. Coco is inert, so it has virtually no nutrients in it. Most people use straight Coco or a coco/perlite mix, then add nutrients to the Coco, making it nice and rich for the plant. You simply feed Coco nearly every day, so no guesswork there.

Coco and sphagnum peat moss are very similar, but peat is usually too acidic to be used straight for plants, plus its not sustainable. Coco on the other hand comes from coconut husks, which would end up in a landfill if not used as they are a by-product of coconut farming, it’s pH neutral, and since it’s inert you are starting with a “blank slate” for your nutrients, provided you don’t add stuff like bat guano, etc etc. You have a far better idea of exactly what is in the substrate this way, which is my favorite thing with Coco.

Plus, and keep in mind I know nothing about organic mediums and how they work, but if you add too much bat guano or something, how can you correct it? Just have to wait for it to dissolve out and become weaker?

Again, I don’t know how that works, but it seems like more unnecessary work to get Coco, then add a bunch of stuff like bat guano, when you can just use straight Coco and a nutrient line like Jacks 321 (most common nutrients for Coco currently).

Not to mention, don’t be scared of the “water every day” thing with Coco. You can buy a 5 gallon bucket for instance, a WaveMaker (device usually used in aquariums to keep water moving and mixed) and make a large batch of nutrients for 5 days or so. When you go to feed, re-ph (pH drifts over tine), then apply tge mix to the Coco. Coco also needs less water to become saturated, so you aren’t going through like a gallon a day or whatever you normally go through with a soil based grow.

This is why a lot of people are switching to Coco. Takes out a lot of guess work, better for the environment, and from what I’ve seen gives a faster growing plant.

It’s just important to realize that the way @Aussie_autos is using Coco is different than how most people use it. He is basically using it as a substitute for peat moss in his own organic soil. I want to be clear, I’m not saying anything is wrong with it, but I feel like better results can be had if Coco is used by itself or just with a bit of added perlite.

Just my 2 cents.

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No, I have some in hydroponics and some in soil. I have coco on my “to do” after I get thru all my soil plants. I’m very tired of my dirt bringing pests into my tent with it.

This. Also I am in NM right next door. My humidity is rarely over 50% even with a humidifier running. I gave up chasing VPD and let my plants just deal with the natural climate, more or less. If the humidity gets below 30% I’ll turn on the humidifier but otherwise I don’t stress it anymore.

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I know what you mean ,see with my grow ive added alot of natural organic nutrients as u know and i also have live worms in there aswell which will be breaking down the coco coir making it into a soil and having peat moss in there helps aswell i will be reusing this soil and i have some new organic fertilizers coming i have bone meal and alfalfa meal and sea bird guano and kelp meal coming and next run i will be adding mushroom compost as well which i will also use in a compost tea and my soil mix will still live worms in it to help break down nutrients and to put live bacteria back into the soil i will be adding a bit more perlite aswell

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I started growing in coco last year. I really liked the growth, but I was looking for something less time consuming. First I moved to fabric pots. From experience, I’ve found it is quite difficult to overwater in them. Then I started adding composted manure/worm castings to the coco/perlite.

4 parts coco
1 part composted manure/worm castings
1 part perlite

The above is seedling and rooted clone friendly. They stay in this for the first month or so. At transplant, I amend the soil with Happy Frog dry amendments at half strength. Then they get a top dressing of HF every month.

Seedlings get watered with an eyedropper for the first week or so. I apply the water to the base of the plant to encourage downward growth of the tap root. Once transplanted, they get a cup and a half of plain water per gallon of medium. I water every other day or so. About every week or so, they all get a good soak. I dunk the plants I can and let the pot sit until completely soaked. You could also water slowly to runoff, but I feel my way is more thorough. I also mix up a tea for them every month or so.

My plants tend to develop a system of fine roots that fill the whole pot.


I really love the fabric pots. I decided I needed to raise my mainlined Super Skunk. It was only about 18" tall when I put her into flower. I’d seen this on a few of my plants.

Because of the high humidity, instead of air pruning, the roots were growing out of the bags. I decided to fill a 10 gallon pot and set the 7 gallon pot on top of it.

10 weeks later at harvest.

Like I said, I love fabric pots.

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Alright guys just did my first daily water with sensi grow making sure to have a little bit of run off. Pretty pumped to see a couple 5 leafers today though. See if I can turn these ladies around. Thank you everyone for the advice. Glad I asked! How am I lookin?




Decided I’m going without the humidifier. With watering everyday it sits a little under 50. Figure better then near 70 on low.

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Looks great your humidity will be fine at 50- 70 for a few more weeks just when it’s flowering you’ll wanna keep it below 55 to prevent bud rot

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This has been interesting reading. I’m using coco core with miracle grow 50/50, seems to work well with my grow. I’ve been using the powered fertilizer from this site and all has been working great. PH has been stable and watering has been managed with a moisture meter.

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Thanks for your help man. Hopefully I’m on the right track now.

I’m thinking about using that stuff, what’s your experience with it so far and how does it work?

I was skeptical at first. But it’s really grown on me. I can see how its not for everyone because it’s kinda high maintenance in the way it need to be watered daily. But its nice to know what is being given to the plants. I’ve been using sensi grow and keeping a ph of 5.8 and my plants have been loving life ever since.


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Gorgeous ladies! Fans colors etc on point!

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