I personally like the General Hydroponics Flora trio plus Calimagic (a Cal-Mag supplement) for growing in coco coir. This is what I use for my coco coir grow. You can follow the nutrient schedule provided by GH as long as you provide plain water every other watering. Or…
Give Cal-Mag at full strength alongside your nutrients for at least two weeks at the beginning of your grow. You may also add Cal-Mag with your other other nutrients if needed throughout the grow, though you may want to give it at lower doses.
Now that you’ve got your mix ready (or purchased a pre-made coco coir mix), it’s time to start growing!
2.) After seedling grows first set of “real” (serrated) leaves, water with nutrients at normal seedling strength , and add a regular dose of Cal-Mag (Calimagic). Keep giving water until you get about 20% runoff out the bottom of the solo cup. The first set of leaves are round, but the second set are serrated and pointy. Once you see those leaves, it’s time to water your seedling with nutrients.
For the easiest coco coir growing, get a smart pot (pot made out of fabric – they work perfectly for growing cannabis and have good drainage).
5.) Wait 8-10 minutes or until the coco coir gets fully hydrated.
Any quality cannabis nutrients made for hydroponics will work well for growing in coco coir as long as you also use a Cal-Mag supplement.
This tutorial will show you how to re-hydrate coco coir bricks and mix with perlite to create a rich, cannabis-friendly potting mix. I will also share some hints about growing cannabis in coco coir and how to take care of your plants for the best results.
We at Organic Mechanics think our Cocodelphia coco coir product is one of the best on the market. Why? For one thing, we buy our coir from just one farm in India, so our variability in quality is essentially non-existent. That farm washes the coir several times and relies on the monsoons of Southeast Asia to accomplish this. Once we have received the coir, it’s washed again as we rehydrate the air-dried, compressed coir blocks. Essentially, Cocodelphia is triple washed.
If you’re just beginning to grow cannabis legally, you’ll want to grow it correctly. While we won’t get into the day-to-day details of cannabis production here, we will explain how to get your cannabis crop off to the best start possible. It all starts with your growing media (and we know growing media). Specifically, one growing media of choice for many growers is coco coir.
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The Science of Coir
Our Cocodelphia is also continually tested for heavy metals, and each test result comes back clean. Don’t just take our word for it! Our customers have done their own testing and tell us it’s the cleanest heavy metal-free coir for cannabis production around. And for you professional cannabis growers out there, you know cannabis that fails a heavy metal test means a lost crop and lost profits.
Packed with nutrients and biostimulants. It’s a formerly living thing, so it comes packed with its own set of nutrients, such as potassium, iron, manganese and zinc, to name a few. Again, you should take this into account when considering what nutrients to apply. It also contains biostimulants, which act as growth enhancers and give whatever is planted in it a boost.
Watch for salts. If there is a downside of coir it’s the fact that the product in its raw form contains salts. You, the end user buying coco coir products, don’t really need to worry too much about the salt level because it has been processed and washed extensively before you receive it. But if for some reason you’ve found some compressed blocks of raw coir, do know the salts need to be rinsed away or else it can harm your crops.
What Is Coco Coir?
I mentioned “science” above, and it turns out “science” is a key aspect of why coco coir is an ideal medium for growing cannabis as well as other crops. Some of the properties of coir that allow crops to thrive when grown in it include:
Over the last decade cannabis production has come out of the closet, quite literally. The first person I knew to have grown his own cannabis (or marijuana or pot or whichever name you prefer to call it) grew several pots of it in his bedroom closet, hidden away from his parents. And while some folks may grow cannabis in places unseen by parental and other authorities’ eyes, at-home and/or commercial legal cannabis production is now A-OK in 18 states and Washington, D.C. with more coming on board every year.
Rx Green Technologies offers a variety of coco coir substrates to choose from, including loose coco and coco grow bags. CLEAN COCO is available as loose coco coir in 100% coco and 70% coco/30% perlite blends. Loose coco is ideal for flling reusable or disposable pots, as well as topping off and reflling seasonal outdoor pots and beds.
In order to properly manage substrate moisture and nutrient availability in coco coir, it is important to understand a few key terms. Saturation describes the total volume of water a substrate can hold by percent of substrate weight, or the water holding capacity (WHC). Field capacity describes the available water content in a substrate after excess water has drained. Permanent wilting point occurs when there is no remaining moisture available for plants to extract from the substrate.
Substrates like coco coir that consist of high organic matter will decompose during the production cycle, leading to changes in the air to water ratio. This highlights the importance of consistent moisture monitoring and irrigation adjustments based on moisture readings. A soil moisture sensor that measures volume water content (VWC, %) is a simple tool that can be placed into the root zone to monitor moisture.
Coco coir substrates are a popular choice for cannabis cultivation. Coco coir is a sustainable and renewable resource and can be easily composted after use. It can be purchased loose or compressed (for growing in containers) or in compressed grow cubes (as an alternative to rockwool blocks). Coco coir can be used once and discarded or used as a top dressing for raised beds and feld soil to increase organic matter and moisture retention in heavy clay or sandy soils.
CLEAN COCO grow bags contain a compressed brick of pure coco coir in a disposable, perforated bag that is made of recyclable UV-protected plastic. Simply hydrate the brick and transplant your rooted clone or young vegetative plant into a 1-gallon or 3-gallon bag. This is an ideal option for large scale cultivation facilities with automated irrigation, as well as any grower looking to cut down on labor expenditure with pot flling and transplanting.
The frst irrigation typically starts one hour after lights on or sunrise and ends one hour before lights off or sunset. Irrigations can be scheduled hourly or more frequently, depending on conditions. Excessive dry down between irrigations may increase soluble salt concentration and contribute to hydrophobic properties of the substrate. Clear water fushing of the coir substrate between nutrient feedings is an effective procedure to reduce and prevent salt buildup.
OUR COCO COIR PRODUCTS