Issue #123 - Sunday, August 24, 2014
Dear Fellow Grower, In today's issue... - Learn how to achieve perfect air circulation and make a cheap & stealthy exhaust system for almost any setup.
- See some examples and make your own stealthy exhaust system!
- Check
out this week's trophy pic by a first-time grower!
Happy Growing! Nebula Haze & Sirius Fourside (founders of GrowWeedEasy.com)
"Every risk is worth taking as long as it's for a good cause, and contributes to a good life." ~ Richard Branson
Air Circulation & Exhaust Tutorial by Nebula Haze |
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Cannabis plants love a nice breeze and fresh air in the wild. When growing cannabis indoors, you have the ability to control the air circulation and use your exhaust to
create the perfect indoor environment for your garden that mimics the best parts of nature. This air circulation and exhaust tutorial will teach you how to recreate an environment that makes cannabis thrive. During my first indoor cannabis grow, I didn't pay much attention to air
circulation or creating an exhaust. I had a fan blowing directly on my plants and thought I was good to go. I found out that growing my plants without any way to exhaust heat caused the grow area to become way too hot and humid, even with small grow lights like CFLs. This led to several issues, including root problems, white powdery mildew and heat burn. It could have been much worse because these same conditions can also lead to bud rot, fungus gnats, spider mites, and other unpleasant guests in the grow room. Once I started exhausting out air from my grow area, cannabis plants grew faster and so many random problems disappeared.
It made me realize how many indoor cannabis growers may be unintentionally hurting their plants and yields by missing a few key points about air circulation and creating an exhaust to vent out heat. Here's some important points I've learned about air circulation... - Faster Growth, Bigger
Yields - Plants given the right environment grow faster and produce more bud
- Temperature & Humidity - An exhaust system helps control the temperature and humidity levels in the grow area by venting out hot and humid air, and replacing it with fresh air. Fans within the grow area prevent hot or humid patches.
- Prevent Mold & Pests - Many
molds and pests like stagnant air, high humidity and heat. Fresh cool air blowing over and under your plants will reduce your chance of seeing many types of mold and pests.
- Stronger Stems - A breezy environment strengthens stems.
- Use More than One Fan - Air circulation within the grow area is just as important as venting old air out.
It's important to have both an exhaust fan and small oscillating fans within the grow area for the best results.
- Exhaust Systems Can Be Cheap & Stealthy - There are cheap and stealthy ways to create great air circulation and exhaust heat. You have more options than drilling holes or ducting, and many window exhaust options are indetectable outside.
Air circulation (the way air moves around in your grow space) is an important ingredient to create a perfect growing environment for your cannabis. Indoor growers strive to create a better-than-nature environment for their plants. The way that air moves has a surprisingly big effect on how your plants will grow. In nature, cannabis plants thrive in a gentle breeze Why is Air Circulation Important? When growing cannabis
indoors, plants are normally in a relatively sealed environment without access to regular wind, whether plants grow in a closet, a tent or an room dedicated to growing. This can cause some problems compared to growing outside. Outside in ideal conditions there's a breeze flowing through plants, giving them fresh air and strengthening stems. A steady supply of fresh air along with a breeze (not too much, not too little) helps cannabis grow faster and even protects plants against certain pests
and molds. - Benefits of good air circulation and an exhaust system include...
- Protects plants against mold, bud rot and white powdery mildew
- Less likely to get pests like fungus gnats and spidermites
- Control heat & humidity to create a perfect growing environment
- Strengthens stems by allowing them to bend & sway like in nature
Reduce Chance of Mold, Bud Rot & White Powdery Mildew As air blows over the leaves, it carries away moisture released during transpiration. This allows your plants to drink more water (and pull in more
nutrients) at the roots. This regular removal of moisture on the leaves also greatly lowers your chance of running into mold, but rot or white powdery mildew.
Protects Cannabis Against Spider Mites & Fungus Gnats
Air flowing over the plants and soil fights against nasty garden pests like spider mites and fungus gnats by making it hard to fly and drying out the top layer of soil.Spider mites and fungus gnats both
love stagnant air and have trouble living in a strong breeze. A breeze also creates a lot of air circulation over the plant containers, which keeps the top layer of soil relatively dry. Dry top soil makes it hard for pests like fungus gnats to breed (moist top soil creates a perfect breeding ground for molds & fungus gnats). Whether growing inside or
outside, growers with a nice breeze blowing over their plants and soil tend to get less pests. Temperature & Humidity ControlGreat air circulation combined with an exhaust system helps disperse water vapor and heat evenly throughout the grow space. Small oscillating fans blowing above and below the plant canopy helps equalize the air so there's no hot or humid spots. An exhaust system ensures that all the air in the grow space is replaced regularly, so plants stay cool,
get a fresh supply of CO2, and live in the right humidity. It's important for plants to be exposed to fresh, moving air for the best growth rates. Learn more about temperature and humidity. Strengthens Stems A nice breeze strengthen stems by allowing them to bend and sway like in nature. This builds up the strength of stems over time, which comes in handy when plants start
to get big and heavy from bud. Use Fans & Exhaust System to Control Environment Indoors
Some of the best tools to control air flow, humidity and temperature in the grow room are fans along with a way to vent out used air. Let's cover what you need to know about fans for in the grow room and as part of your exhaust system. Placing Fans In The Grow Area Most indoor cannabis growers use fans to blow air around within the grow area. This creates a nice breezy environment that cannabis plants love. Placing Fans - Ideally you'd like a nice breeze surrounding the main canopy, which means you want air blowing above and under the plants.
- Don't point a strong fan directly at a plant, because too much wind can start to damage the leaves and stems.
- After placing fans, check around the grow area to make sure that all parts get a slight breeze. If you feel stagnant air or a lack or breeze, you may want to adjust your fans.
- Small oscillating fans are great for the grow space since they're cheap and can be used to provide a nice gentle breeze to a relatively wide area without blowing on any one part too long.
Be Careful! Too Much Wind Causes Clawed Leaves When there's too much breeze, the affected leaves will start getting "wind-burned." Wind-burned leaves are often curved under and form "claws." They can look like they're droopy from overwatering, underwatering, or possible a nitrogen toxicity, but you know you've got wind-burn when the leaves in front of the fan are clawing, and leaves further away from the fan look fine. Just for reference, here's what too much wind/fan looks like! Choosing the Right Fan for Exhaust System Even when you're not worried
about heat, it's still important to regularly replace all the air in the grow area, which means you need a way to vent out old air. An exhaust system uses fans and often ducting to move hot and humid air out of the grow space. Designing an efficient exhaust system will be much simpler if you take the time to understand airflow in a room - the whole idea of setting up an exhaust system is to
create negative airflow in the grow space or grow tent so that any hot air is regularly replaced with new, fresh cool air. All the air in the tent should be replaced by new air every 1-3 minutes for the best results. I recommend aiming to replace the air every one minute unless you live in a cool place. You can calculate the strength of exhaust fan you need based on the dimensions of your grow
space. In order to move air out of the tent and vent it outside, you need to use at least one strong fan as part of your exhaust system.
How to Calculate Exhaust Fan Strength
| Who Runs This Newsletter?
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Nebula Haze:As an epilepsy patient, medical cannabis is important to me, and I'm dedicated to showing
others how easy it is to grow their own supply of cannabis at home.
It is my mission to educate and build growing resources to help both new and advanced growers get bigger, better yields with less time and money.
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Learn which seed sources are personally recommended by Nebula Haze |
Sirius Fourside:Sirius Fourside is a hobbyist grower who has gained the bulk of his experience growing in water as a
medium(deep water culture, bubbleponics)."Growing cannabis is a relaxing hobby in and of itself, but it also saves you money and keeps you from having to deal with shady
characters. Cannabis is much easier to grow than people give it credit for, and growing in water doesn't increase the difficulty much, if any. But whether you want to grow in water, perlite, or a different medium, we'll show you how easy it can be!"
How Can You Create a Stealthy Exhaust? |
Here are 3 examples of growers using their creativity to create stealthy and functioning exhaust systems!
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Use a portable AC window kit to disguise the exhaust from a grow area. This method takes advantage of the fact that portable air conditioners come with a special window kit that fits into most windows. This look completely normal from the
outside. A portable AC usually looks something like this. Notice the classy window fitting. You can buy a replacement window kit and install it in your window. It has a hole to vent air outside, but looks like you just have an AC.
This is what a fake portable AC vent looks like in your window from the inside Learn how to make a fake window AC unit:
Wicker Blinds to Hide Exhaust Learn how to make a stealthy "secret window" exhaust system like this below... I used a few common items to create an awesome exhaust system for about $45 (just add your fan). This method takes advantage of the fact that wicker blinds do not allow anyone to see in, but they do allow air to pass in and out. Wicker blinds
offer privacy but still allows air to pass through Here's what the finished exhaust system will look like from the inside... Learn how to make a hidden window using wicker blinds
Awesome Homemade Fake Window
Sent in by Ray. Love this idea! Here's what the window looks like from outside - completely undetectable! Learn how to make your own homemade hidden window
Trophy Picture of the Week!
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Just wanted to say thanks so much for this site. I found it when I first started growing a year and a half ago and the information has been invaluable during this time. I refer back often and let me say I have never had a bad grow or lost a plant due to the great and very helpful information here. It is my only source. Thanks again! ~ Rickster |
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