Dr. Coco and Dr. Photon collaborate to write scientifically accurate articles and guides on all topics related to growing cannabis. Our articles are grounded in plant science and our extensive backgrounds in horticulture and lighting. We are growers, so our tutorials are informed by our actual practices. You can be confident in our resources. Everything we publish goes through a rigorous peer review process. We take pride in publishing clear and accurate information that helps home growers maximize the success of their cannabis grows.
Grow Light Guide
- Grow Light Metrics Primer
Learn about the science of horticultural lighting. We explain the key grow light metrics and terminology: PAR, PPF, PPFD, and more. Start here to make the most of our Grow Light Guide!
- Grow Light Calculator
Our grow light calculator provides an accurate way to analyze and compare different grow light fixtures. You can enter your own grow light data or select a preloaded fixture. The Calculator will tell you the Usable PPF, Efficiency, Coverage and Harvest Potential. The Grow Light Comparison Table allows you to easily compare different fixtures.
- Calculating Grow Light Efficiency, Coverage & Harvest Potential
It is time to move past only using wattage to evaluate lights! Learn how we use Usable PPF to calculate our efficiency ratings, coverage estimates, and benchmark harvest targets.
- Grow Light Testing Protocol
Field testing produces the most accurate measurement of Usable PPF, but it must be done correctly. In this article, we explain our testing protocol and the science behind it. Learn about test area size, the importance of reflective walls, and the scientific way to determine optimal hanging height.
- How to Evaluate and Compare Grow Lights for Cannabis
Learn about the science of horticultural lighting. We explain the key grow light metrics PAR, PPF and PPFD, and show you how to use them to compare and evaluate grow lights.
- How Much Light (PPF) Do You Need for Indoor Cannabis?
We review the science of cannabis photosynthesis and explain the optimal quantity (PPF) and density (PPFD) of light for indoor cannabis. Not enough light leads to “larf” and too much light can result in photoinhibition. We include a Grow Space Calculator which shows the optimal light and harvest potential for any grow space.
Grow Set-Up Guide
- Grow Tents and Harvest Sizes
In this article, we review the different options for creating a grow space, discuss the advantages of using a grow tent for indoor cannabis grows, and give harvest estimates for different size grow tents.
Other Set-Up Guides
- Airflow, Ventilation and Exhaust Systems for Grow Tents
- Managing Heat and Humidity in Your Grow Tent
Media & Containers
- How to Prepare & Buffer Coco Coir
Before you start growing in coco there are steps you should take to make it into the best medium for cannabis. Learn how to buffer and prepare your coco and avoid the dreaded “CalMag problems”.
- How to Reuse/Recycle Coco Coir
Coco is good for more than one grow! Learn how to recycle your used coco back into a superior medium for your next cannabis crop.
- Guide to Automatic Watering for Indoor Cannabis
Everything you need to know to set up & run automatic watering systems. Top-feed Vs. Bottom-feed, Recirculation Vs. Drain to Waste, Preventing Bacteria, Topping-off & Cleaning Out.
- DIY Automatic Watering System for Indoor Cannabis
Automatic watering makes growing in coco a breeze! Full plans, shopping list, and installation instructions for a simple and easy DIY Automatic watering system for your grow tent or grow room.
- DIY Self-Draining Saucers
Self-Draining saucers make any grow much easier! They are needed for a fully automatic watering system. Anyone can make them with our complete DIY plans, shopping list, and assembly instructions!
- DIY Auto-Pumping Drain Bucket
How do you remove the waste water from the tent? The self-draining saucers need to drain to somewhere! If you need a solution, Check out our “Auto-Pumping Drain Bucket”!
Climate & Light
- The Best Environment for Growing Cannabis
Managing climate is critical for a successful grow. Learn about airflow, air movement, VPD and the best temperature and humidity for growing cannabis.
- Cannabis Light Cycle Fundamentals: 24/0, 18/6 & 12/12
What is the best light cycle for growing cannabis? What is the best light cycle for auto-flowers? Do cannabis plants require a dark period? Dr Photon explains the fundamentals of the cannabis light cycle.
- Germinating Cannabis Seeds a Step-by-Step Guide
Germination is where it all begins! Learn about the science of germination, common germination practices, tips and tricks. Includes Dr Coco's Step-by-step guide to germinating cannabis seeds!
- How to Grow Cannabis Seedlings in Coco Coir
Getting little plants through the seedling stage can be tough in coco. To help you minimize the problems and maximize your success, we offer this step-by-step guide to raising seedlings in coco coir.
- How to Clone Cannabis Plants
Dr. Photon explains the science and practice of cloning cannabis and offers his fast cloning method for rooted clones in about a week!
- Transplanting Cannabis Plants: Why, When & How
Transplanting cannabis plants is the best way to develop a healthy root mass and ensure vigorous early growth. Learn the theory behind the practice and when & how to transplant cannabis for the best growth.
- Why You Should Train Cannabis Plants
We explain the science behind plant training to help you understand the practices. Learn about apical dominance, the efficient use of light, and why training cannabis plants leads to bigger better harvests.
- Topping Cannabis Plants: Why, When & How
Topping is a central plant training practice. Learn the science about why topping works, when you should top, and how to actually go about it.
- Mainlines & Manifolds: The Best Ways to Train Cannabis Plants
Explore the plant science behind mainline and manifold training. We define each method, explain the benefits and compare them with other methods. Learn why we think they are the best ways to train cannabis plants!
- How to Mainline Cannabis Plants
Dr. Coco's cannabis mainline training tutorial. I answer the questions about cannabis mainline training and provide step-by-step instructions how to mainline cannabis plants.
- How to Manifold Cannabis Plants
Dr. Coco's cannabis manifold training tutorial. Q&A about manifolds and step-by-step instructions for how to manifold cannabis plants. I include tips and advice about manifolding clones and auto-flowers.
- When & How to Supercrop Cannabis Plants
Supercropping is a high stress technique of pinching and folding stalks. It is a key training practice to manage the canopy of your indoor cannabis grow. Learn how to supercrop to increase yield without risking plant injury.
- How to do a Sea of Green for Cannabis
A sea of green (SOG) is a high density grow technique using a lot of plants and growing them for a short period of time. Learn why this is such an efficient strategy and how you could set up a SOG.
- How to Train Mainlines & Manifolds in Late Vegetation & Flowering
- Growing Cannabis in Coco with High Frequency Fertigation
Coco coir is a horticultural miracle because its air/water ratio allows for high frequency fertigation. Learn the principles of fertigation and how to unlock the magic of growing cannabis in coco coir!
- Understanding EC, PPM & TDS for Growing Cannabis
This article explains everything you need to know about EC and PPM. Learn how it affects plants and the theory behind measuring and managing EC.
- How to Water Cannabis Plants in Coco Coir
This tutorial answers all your questions about watering coco! How much? How Frequently? And how to time multiple daily events?
- EC/PPM Targets for Fertigating Cannabis
How strong should your nutrient solution be? In this guide, we walk you through how to set your EC or PPM targets.
- How to Manage Cannabis Fertigation by Measuring Run-off EC
We advise managing your fertigation by measuring run-off EC. Here we explain how to take those measurements and how to respond.
- Proper Disposal of Hydroponic Waste Water
Properly disposing of your waste water is an ethical requirement for home growers. Learn the best practices for dealing with run-off water.
- When & How to Flush Cannabis Plants
We review the different reasons and ways to flush cannabis plants. Learn about flushing to lower EC, flushing to release lockout and the final flush before harvest.
Fertilizers, Supplements & pH
Cannabis Fertilizers, Supplements & pH
In this cornerstone article, we cover the science of cannabis nutrition in a way that all growers can understand. Learn the true role of fertilizers and avoid the common misconceptions about “feeding plants”.
Why & How to Use CalMag in Coco
Learn why you need CalMag in coco. This article explains Cation Exchange in coco, why buffering is so important and how to use CalMag supplements to avoid “CalMag Problems”.
Recommended Nutrient Supplements for Growing Cannabis
There are a ton of nutrient supplements available – but only a few that you really need. See what nutrient supplements we recommend and learn why we recommend them.
How to Mix Nutrients for Cannabis
Video Tutorial! Learn the four key points to properly mixing nutrients: Order, Dose, EC and pH. Includes the Coco for Cannabis Nutrient Schedule!
How to Measure and Adjust pH for Cannabis Nutrients
Learn how to measure and adjust the pH of your nutrient solution and why it matters!
At Coco for Cannabis we cultivate the spirit of collaboration along with our plants! This is a place where growers can communicate anonymously with fellow growers. It is an inclusive and collaborative community. We are interested in learning, sharing and growing together.
The Coco for Cannabis equipment and product guide is a resource for home growers. We understand how difficult it can be to know what specific grow equipment is the best for growing cannabis. We offer our product reviews and equipment recommendations to help you understand what you need, where you should invest and where you can save.