My apologies ahead of time for such a long response. There is no short way to give details that I feel are pertinent.
I grow in coco….Fox farms 70/30 to be exact. It’s buffered and already has a fair amount of perlite (supposedly 30%) mixed in. I do mix in an additional small amount of larger chunk perlite (about 2 cups for 5 gal container) and the same amount of rice hulls.
This style of grow, organically amended coco, is not the most popular, draws an inordinate amount of criticism/skepticism, and apparently has been unsuccessful for a fair amount of growers. Why? I cannot figure out and it’s been, by far, the most stable & problem free method, of the different ones I’ve tried.
Several yrs ago, others made comments about trying to be like Mr. Canuck by using dry amendments and coco. At the time I had no idea who the hell Mr. Canuck even was. But I looked and found his vids on YouTube and finally understood their point…but I digress.
The truth is I was looking for a medium that had no nutrients mixed in, so that I could control exactly what went in.
I had grown quite a bit outside but that was many years ago and I realized that I was extremely lucky back then and needed to educate myself to be successful indoors. At the time I had no idea what coco was….much less how to grow in it.
At first I punted the idea of using coco, because of the way most growers use it.
It’s highly productive and there are some growers on this site that produce some truly amazing plants using coco and traditional bottled nutes. I didn’t want to have to provide the high level of maintenance & upkeep though. Watering daily or, in some instances, multiple times per day was quite a commitment. Measuring the ppm/ec of what’s going in and the runoff, strictly controlling the ph, etc etc. I simply don’t have time to provide that much time to a side hobby.
I had grown (indoors) in soil and gotten decent results but decided to basically treat coco much like soil, but with me adding in exactly what I wanted.
I loved the idea of pre-mixing my medium and giving only water when it’s needed.
It was the perfect combo of control and low maintenance…….so far it’s worked out as planned.
Sorry for the preamble but it’s good to know where someone is coming from.
As for the laundry list, I’d keep it simple and tweek it after you have a basis to draw from.
I usually start off in a solo cup with coco and EWC. Once they are about 2 weeks old I’ll move to 1 gal pots of my amended mix. They’ll stay there for about 3 weeks give or take and then move to the final 5 gal w/ the same mix.
I’ve added and subtracted this and that over time, but the following is tried and true. You can pre mix it as far ahead of time as you like….the thing I do is water the mix…..water it and mix it some more.
I make sure the entire medium is very moist when I transplant. Anyway here goes:
Measurements are per gallon of coco…
—3 cups of EWC,
—1/2 to 1 cup perlite….if you’re using Fox farms 70/30. If using straight coco you’ll def want to add more.
—1/2 to 1 cup rice hulls,
—3 tbsp
Gaia Green 4-4-4 or any all purpose organic w/ ratios geared for the veg stage. There are quite a few good all purpose dry organic options.
— 1 tbsp basalt or rock dust…..I use
Gaia Green brand basalt.
—1.5 tbsp myco…..there are several brands of “myco”……I use dynamyco, this is your microbial catalyst.
— 1 tbsp insect frass
— 1 tbsp kelp meal
You could stop there and be just fine. Some would argue the insect frass and/or kelp is overlap and not needed….they’re not wrong, but I’ve seen better results with them.
Normally I’ll transplant into 5gal pots and flip to 12/12 about 3 weeks later. I’ll adjust my top dressing accordingly if I flip earlier or later.
Assuming about 3 weeks in the 5 gal then flip, I’ll wait about 2 weeks after flip, so 5 weeks after moving to 5 gal and give my first top dress. It’s simple, doesn’t take long and u know exactly what you’re putting in.
FIRST TOP DRESS for a 5 gal pot
— 2 tbsp 4-4-4
Gaia Green….or whatever you used initially.
— 3 tbsp 2-8-4
Gaia Green. This is GG’s flower stage mix. Again, you don’t have to use GG, but it should be a flowering mix w/ an NPK ratio somewhere in the 1-4-2 range…..so a 3-12-6 or 5-20-10……and just follow the directions on the label.
— 1/2 to 1 cup EWC.
That’s it for top dress 1. Just mix it all up, kinda work it into the top layer and water.
I will generally do another top dress about 4 weeks after the first.
For top dress 2, I simply replace the 2 tbsp of 4-4-4 with more 2-8-4…..so that would be 5 tbsp of 2-8-4.
As the plant moves through flower it will require less N and more P&K.
I also add bone meal and langebeinite but it’s not absolutely essential. I can give more info if you want.
The only other points of discussion would watering, cal mag and the use of either ReCharge or some sort of organic tea.
I use Recharge from week 3 of veg through week 7 of flower. Once every week and a half or so……like clockwork. The plants respond well and it’s easy to give.
As for watering, I use tap water. I let it sit out a day or 2 to gas off the chlorine. I use organic ph lowering drops to ph to 6.0.
I’ve been told various things about this….that it’s coco so it needs to be 5.8-6.2…….that it should be inline with a soil grow, so 6.0-6.8……and my personal favorite, that ph doesn’t matter in an organic grow.
Regardless, my tap is very high, near 8.0, so I’ve settled in at 6.0 and the plants give me no trouble.
As for how to water, I try to make sure the medium is always moist….and I try to water to the point of runoff but stop just shy. I don’t wanna leach out my amendments. I’ll occasionally get a few oz of runoff but I try not to.
It’s important to water very slowly. I recommend “coco wet” or some other wetting agent….even a drop of Dawn works fine. But you really need to water at a snail’s pace. Saturate the top and walk away…..wait at least 10 min before giving more. If u think you’re watering slow enough, give it a few more min.
I’ve given water and thought I could give more only to have runoff start dripping out a good 10 min after I poured it on.
In veg, I usually water thoroughly every 3/4 days. Once flowering starts its every other day for the most part.
One last thing……I’ll sometimes have to give the tiniest bit of cal mag. Never more than about 2ml per gallon. But your tap may provide it just fine. The plant will let u know if it needs it.
Again, sorry for such a long response, but I think I covered most everything.
Lemme know if you need any other info.