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Issue #355 - Sunday, February 3, 2019
Dear Fellow Grower,
In today's issue...
- Have you ever heard of Tobacco Mosaic Virus? It's possible this virus has spread to cannabis plants, but there is controversy. Has it finally happened?
- What's the different between nutrient brands? If you want the best yields and fastest growth, it's important to give your plants the right amount of nutrients at the right time. Learn which nutrient brands can be trusted!
- This week's trophy pics feature an auto-flowering strain with buds that are the deepest purple I've ever seen!
Nebula Haze & Sirius Fourside (founders of GrowWeedEasy.com)
"Whether you think you can, or you think you can’t, you’re right."
~Henry Ford
Tobacco Mosaic Virus (TMV)
by Nebula Haze
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These mottled leaves could potentially be signs of mosaic virus in plants
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Tobacco Mosaic Virus (TMV) is a virus that is commonly found in tobacco plants which causes splotchy or twisted leaves, strange mottling symptoms (a “mosaic”), slowed growth, and reduced yields. Mosaic virus has spread to several other species of plants, and there
is evidence that cannabis plants may be able to catch mosaic virus, too. Although mosaic virus can’t hurt you (the grower), it can prevent plants from growing as fast or yielding as well as they could have.
Can Cannabis Plants Catch Mosaic Virus?
These pictures show the symptoms of what several marijuana growers believe to be the result of mosaic virus, including twisted, curved leaves, yellow stripes, spots and a mosaic pattern. However, it’s important to note that these symptoms could potentially be caused by a mutation or other genetic factor. It’s also possible that other plant problems such as heat, root rot, general stress, nutrient deficiencies, etc. could cause similar symptoms. You may need to worry about TMV if the affected plants are growing slowly, seem sickly, and generally aren’t producing normally.
Fun Fact: Tobacco Mosaic Virus was the first virus ever to be discovered!
Affected leaves may look like they have uneven stripes of light and dark green. Yellowing is worse on the parts of the leaves that are deformed and twisted. For many plants suspected to have mosaic virus, the dark green areas tend to be somewhat thicker than the lighter portions of the leaf.
Curved leaves with yellow stripes or mottling are usually considered the main symptom of mosaic virus.
In my experience, some growers swear their crops have been greatly affected by TMV, while others deny that the virus has actually even spread to cannabis plants at all. The mosaic virus can be difficult to test for, even in a lab. The main
problem with TMV is that it may cause plants to grow slowly and produce poorly. If your plant is growing fast and healthy, with no other symptoms, and you’re not noticing it spreading from plant to plant, you probably shouldn’t get too worried.
You probably don’t need to worry about TMV if…
- Affected plants are otherwise healthy and fast-growing
- You’re not noticing the symptoms spread from plant to plant
- It seems to be genetic (for example common among all plants of a strain) but you’re not seeing symptoms on unrelated plants
- You think another problem may be causing the symptoms
When it comes to cannabis plants, curved leaf “fingers” can be caused by many things, including a random mutation, incorrect pH, watering problems, root problems or other deficiencies. However, with TMV the twisted growth is accompanied by a speckling/mosaic pattern and poor growth.
Several leaves throughout the plant can display symptoms, or it may just be one or two leaves. With other species that get mosaic virus, some plants are silent carriers and may never show any symptoms.
It’s easier to see the leaf mottling if the affected plant surface is partly in the shade.
Which Nutrient Brands Can Be Trusted?
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What’s the difference between nutrient brands?
If you’ve decided to start growing cannabis for the first time, trying to figure out the best nutrients for your setup can be very confusing. There are many nutrient companies, and each company creates multiple types of nutrients for different purposes.
The most important thing is to make sure you give your plants the right amount of nutrients at the right time. There are two main life stages for cannabis plants, and each stage has different nutrient requirements. Luckily, many nutrient companies make great products even though they’re all using different formulas and techniques. Here’s how they differ:
- Nutrient Ratios – different brands have come up with different nutrient ratios that they believe are optimal for each stage of growth
- Ingredients – there are many different combinations of chemical and organic compounds that can add up to the same nutrient ratios, and each compound reacts differently with each other. This means you can see two nutrient bottles with the exact same NPK ratios on the bottle, but each will actually provide somewhat different levels of nutrients to your plants.
- Soil or Hydro – it’s really important to match your growing medium with your nutrients. “Soil” nutrients are different from “Hydroponic” nutrients so make sure you’re getting the right kind! Coco coir is generally considered a type of hydroponics when it comes to nutrients, and there are also nutrients specifically designed for coco coir.
- Don’t confuse supplements for nutrients. If the NPK ratios are really low (like 0.2-0.2-0.1) it means that this product is some type of supplement, not a base nutrient. As long as you provide the right NPK and micronutrients by using base nutrients, you are already giving your plant everything it needs to grow. Supplements can be nice, but sometimes going overboard with supplements can cause unwanted reactions between nutrients or possibly burn
your plant. Just to be safe, for your first grow, only use supplements from the same company as your base nutrients (to minimize reactions), and try to pick just the one or two supplements that appeal to you the most (to minimize the chance of burn by going overboard). Nutrient companies will happily sell you supplements you don’t actually need so it’s up to you to narrow it down to just a few!
Now that you understand the basics, are you ready to learn how to figure out the best marijuana nutrients for your setup?
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What’s the Best NPK Ratio for Cannabis Nutrients?
For the best results, your cannabis needs the following nutrient ratios….
Where is this information? Most nutrient bottles display 3 numbers, often called N-P-K, which stands for Nitrogen, Phosphorus and
Potassium
Why “K” for Potassium? The atomic symbol of Potassium is “K” from Neo-Latin kalium.
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"Thanks so much guys, would have been lost with out ye. I've learnt so much. This is my second attempt at growing. I'm so proud of myself but that's all from your great teachings guys 😎😎"
~Anthony
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Trophy Pictures of the Week! |
~PapaJoe
I'm also blown away, absolutely beautiful! ~Nebula Haze
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Who Runs This
Newsletter? |
Nebula Haze:
I'll be honest with you, when I first started growing, I struggled. Now, it is my
mission to make it easier for new growers to get started as well as help advanced growers get bigger, better yields with less time and money. We are updating and adding articles every single week and our goal is to eventually build a comprehensive growing resource so anyone and everyone can grow if they want to! If we all share the knowledge there's more buds in the world for everyone :) |
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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 can be 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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