Trouble reading today's article? Click here: Issue #180 - Sunday, October 4, 2015 Dear Fellow
Grower, In today's issue... - Learn to control humidity in your grow room and you'll see bigger, healthier
plants with more potent buds in return!
- A grower showed us a cool trick to monitor your temperature and humidity remotely! We'll show you how it's done!
- This weeks trophy pics are what we're all looking for: a crowded forest
of sticky trichomes!
Nebula Haze & Sirius Fourside (founders of GrowWeedEasy.com) "My fake plants died because I did not pretend to water them."
~Mitch Hedberg
Control Humidity in Your Grow Room! |
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Introduction If you want to grow sticky, high-potency buds, your cannabis will demand attention to its many
needs.
One need of the growing cannabis plant - that is commonly overlooked - is humidity.
Believe it or not, humidity is actually very important to your plant! Humidity will help determine your plants resilience against mold/mildew in addition to how much your plants need to
drink.
Luckily, there isn’t much to learn, so you can be the master of humidity in your grow with very little effort!
Today we will give you the information you need to have complete mastery over humidity and thus, give your plants a boost in production!
Why Humidity Matters To YOU
In all stages of cannabis growth your plants will have a constant need to intake water, and the amount of water they need fluctuates with the humidity in
your grow room. When the humidity is high, cannabis plants use their leaves to absorb moisture from the air which causes them to drink less water from their roots. Conversely, when the humidity is low, they will pull more water in through their roots. Since humidity changes how much water your plants drink, and the water you give your plants have nutrients in them, being in control of humidity gives you increased control over your plant's nutrient
intake.
But controlling humidity isn’t just about prevention...having the right humidity encourages strong, healthy, leafy plants with vigorous growth. In fact, growing with DWC (Deep Water Culture) / Bubbleponics during vegetation with the correct humidity can actually turn into a struggle to tame out-of-control plant growth!
Additionally, after your plants start making buds in the flowering
stage and get close to harvest, you can manipulate the humidity of your grow area to get your plants to produce more resin (trichomes/glitter which contain THC and other cannabinoids) while preventing plants from being attacked by mold. High humidity can sometimes cause mold or bud rot - a grower’s worst nightmare for those fat, dense main colas.
Effects of Poor Humidity Management
We’re not out to scare you, but you should know what happens to a grow room with poor humidity management. We’ve experienced every single one
of these effects, so don’t feel bad if you’re just learning this stuff!
White Powdery Mildew
- White Powdery Mildew is a fungal
disease that will shows up high humidity environments. This can be tricky since young cannabis plants flourish in humid environments. Luckily, you can stave off WPM by making sure there is proper airflow in your grow area; a small oscillating fan - even on the low setting - works wonders.
Bud Mold or Rot - Bud rot or mold is - in my opinion - one of the worst pains a grower can experience as a result of poor humidity management. Imagine harvesting a huge, dense main cola from your plant only to see the insides are totally white or brown with mold. Buds in this condition are unusable and 100% should be thrown
away.
Nutrient Problems - Humidity is a factor that partly determines how much
your plants will drink. If the air is dry, your plants will tend to drink more at their roots. If they’re already drinking more due to high temperatures, low humidity can cause them to drink a lot of water through their roots and uptake too-high levels of nutrients. If your plant takes in more nutrients than the plant can use, the leaves will begin to show yellow or burnt tips, which is the result of nutrient burn. Sometimes too-low humidity can cause other apparent nutrient problems.
Slowed Growth
- Cannabis plants love higher humidity when they’re
young, and lower humidity when they’re mature. To be frank, if they’re not getting these conditions, they’re not growing nearly as fast or healthy as they could be.
Humidity Basics
Okay, so now you know why you need to manage humidity when growing cannabis, but you may not know what humidity
you are aiming for. This chart is the quick-and-easy answer: Humidity is actually a measure of how much water vapor is being “held” in the air. There are different ways to measure humidity, including
"absolute," "specific," or "relative" humidity.
Most growers are talking about Relative Humidity or RH when they talk about humidity in the grow room.
Relative humidity measures how much water is in their air compared to the maximum amount of water that can be held in the air at that temperature.
Below is a quick reference for the major stages of the cannabis life cycle in regards to the relative humidity you are
aiming for. We'll go through them all in more detail Clones
Optimal Humidity is 70-80% RH Clones need time to
develop a root system to intake water. Young clones are solely dependent on getting water through their leaves from the air and this is only possible with high humidity.
Maintaining high levels of humidity will dramatically increase the chances of clones rooting successfully, and will increase young clone growth.
This is why many growers use a humidity dome for new clones!
Young plants (seedling to end of vegetative stage)
Optimal Humidity is 40-70%
RH Young cannabis plants in the vegetative stage grow a lot of leaf mass in a great growing environment, and plants can sometimes grow foliage at a faster pace than the
roots.
But the roots aren't the only way your plant gets water. Leaves can actually pull water vapor directly out of the air, and higher humidity in the air allows the leaves to get more water to the plant if needed. Until your plant has fully developed roots, higher levels of humidity in the air will tend to promote
faster growth.
That’s why younger plants tend to grow better with high relative humidity, especially in a comfortably warm environment that mimics springtime or summer.
Warning Signs: - The RH is too high if the plants are forming wet spots on their leaves
- If the RH drops below 25%, the dry air will tend to limit growth and cause nutrient problems to appear on leaves,
especially for young seedlings
Humidity for flowering plants
Optimal Humidity is 40-50% RH (or less) Ideally, the relative humidity of your grow room should be lowered to around 40-50% at the beginning of the flowering stage. As plants approach harvest, some growers lower humidity down to 30% or even less
to force cannabis buds to produce more resin.
By the beginning of the flowering stage, your cannabis plants have created a large root system to fulfill their water needs. They will still be able to take in water through their leaves, but maintaining a relatively lower humidity than the vegetative stage helps prevent molds or mildews from forming.
Mold is especially dangerous in the flowering stage because it can form on or inside your buds or colas without you knowing. If you find that you have mold growing in any of your buds, or buds
are rotting from the inside, you should immediately throw all of the contaminated buds away. Bud rot can ruin entire harvests, so if one bud is infected thoroughly search your grow room for more. If you can't lower the humidity and already have a rampant mold problem, the best choice might be to cut your losses and harvest immediately to avoid any other buds getting bud rot.
Even if the humidity is low,
it is still important to have air moving over and around your plants. Small fans blowing over and under the plant canopy will help keep air moving so that wet spots don't form around any parts of the plant.
Extra resin production
- During the last 2-3 weeks before harvest, some growers
will use a dehumidifier to drop the humidity of their grow area as low as possible. This not only prevents bud rot during the last few weeks, the dramatic drop in humidity may stress the plant in just the right way to increase resin production. As a result, you harvest extra-potent buds with more sparkly trichomes. While this technique has not yet been proven to increase resin, many growers swear by it.
Humidity for drying buds (early stage cure)
Optimal Humidity is 55% RH (for beginners)
Keeping the humidity around the 45% - 55% range will allow your buds to dry, but keep them from drying too quickly.
This range is also optimal for preventing mold, so it doesn’t get any better for drying if you're a beginner!
As an advanced drying and curing technique, some growers like to keep the humidity a little higher so buds dry slower (which could possibly increase the quality of your cured buds). Drying with high humidity is considered an advanced technique because drying must be done
with extra care to prevent mold forming on your harvested buds!
It's good to have air circulation in the drying area, but it's recommended that no air is being blown directly over the buds to prevent them from drying too quickly. More information in the link below!
Once again, we've wrote so much that there's still more left!
Remotely monitor your temperature and humidity! |
You know what's convenient?
Being able to check on the environment of your grow room without
having to actually go into the room!
A wireless thermometer-hygrometer gives you information about your grow room at-a-glance without being in the room. Combine that with a webcam and remote connection, and you can check on your plant environment pretty much
anywhere!
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Who Runs This
Newsletter? |
Nebula Haze:
Medical cannabis is important to me personally, 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, coco, or a different medium, we'll show you how easy it can be!"
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