poloshow87
420 Member
??? Help???!!
What's this on my leaves red leaves red on edge
- Thread starter poloshow87
- Start date
HappyHazmat88
Inhale Confidence, Exhale Doubt
Hey poloshow, can you please provide some information pertaining to the grow?!
Lights- distance ,wattage ,%
Medium- hydro, soil , blend
Nutrients - anything used thus far in the grow
Water- habits and amount
Strain- auto, feminized, regular
Etc
Without some of this basic information I will be fairly hard to pinpoint the problem and remedy correctly.
Lights- distance ,wattage ,%
Medium- hydro, soil , blend
Nutrients - anything used thus far in the grow
Water- habits and amount
Strain- auto, feminized, regular
Etc
Without some of this basic information I will be fairly hard to pinpoint the problem and remedy correctly.
- Thread starter
- #3
poloshow87
420 Member
Light distance is about 30 inches on hortilux LED 700 50% power. Using bioall organic soil medium. Emerald harvest organic line for nutes. French toast hybrid strain (photoperiod) in 3 gallon fabric pots. Temp stays between 78-80 degrees. 24-0 light schedule
are you using CALMAG?
Looks Magnesium deficiency related. But there could be several factors effecting that.
Looks Magnesium deficiency related. But there could be several factors effecting that.
HappyHazmat88
Inhale Confidence, Exhale Doubt
Hmmm possibly iron deficiency for the yellowing, unfortunately multiple different deficiencies kinda have a that look.
And possibly phosphorus for the reddening leaves since it's only targeting damaged fans not the green ones which says it's not senescence or genetics ?!
True! It's so easy to dive in the rabbit hole. I started with magnesium deficiency, because of the blatant yellow of the leaves. There could always be other deficiencies help, or nutrients being locked out. The important question is why is there a magnesium deficiency, what's causing it?Hmmm possibly iron deficiency for the yellowing, unfortunately multiple different deficiencies kinda have a that look.
And possibly phosphorus for the reddening leaves since it's only targeting damaged fans not the green ones which says it's not senescence or genetics ?!
Understanding the Role of Magnesium in Cannabis Growth
Nitrogen (N), phosphorus (P), and potassium (K) are "the big three" of plant nutrients. In fact, they are the main constituents of most basic plant fertilisers. However, there's a long list of other compounds that also play important roles in plant health, and providing these nutrients to your cannabis plants can really maximise their growth. Magnesium is, without a doubt, among the top nutrients needed to help cannabis plants grow to their full potential.Arguably the biggest reason magnesium is important for plants comes down to its role in chlorophyll production. Magnesium molecules are the main building blocks of chlorophyll—the green pigment in plants that fuels photosynthesis. Therefore, plants that don't get enough magnesium struggle to produce chlorophyll and ultimately struggle to convert light energy into sugars to physically fuel their growth.
Moreover, magnesium also plays a key role in the formation of plant cells and proteins, the regulation of enzymatic processes, and much more.
Magnesium: A Secondary Macronutrient for Cannabis
Plant nutrients are often categorised as “macro” or “micro”, depending on how central they are to the health of plants. For a long time, nitrogen, phosphorus, and potassium were considered the three main macronutrients needed for plant survival. Meanwhile, nutrients like magnesium, calcium, and sulphur (along with many others) were considered micronutrients.Nowadays, however, we're learning that plants, much like humans, are holistic beings that thrive in the presence of a range of various nutrients, not just those needed to keep them from dying. That's why magnesium is now widely considered a secondary macronutrient along with sulphur and calcium.
The Function of Magnesium in Cannabis Plants
In cannabis plants, magnesium helps to:- Promote the formation of chlorophyll, which is essential to photosynthesis.
- Support the transport and metabolism of other nutrient compounds, particularly phosphorus.
- Promote the formation of vital plant proteins.
- Support the synthesis of nucleic acid, a compound vital to the growth and differentiation of healthy plant cells.
- Regulate the proper formation of stomata, which manage gas and water exchange between plants and their environment.
- Regulate multiple plant enzymes.
Magnesium Deficiency in Cannabis: What Are the Signs and Symptoms to Look Out For?
The key to preventing or addressing nutrient deficiencies in cannabis plants is being able to spot a deficiency early, before it causes major problems for a plant. Unfortunately, this can be challenging, as a lot of nutrient deficiencies produce similar symptoms. Below, we'll outline some of the key symptoms of magnesium deficiency in cannabis.Interveinal Chlorosis
Interveinal chlorosis is the direct result of reduced chlorophyll production and activity. It refers to the yellowing of the leaf tissue between veins. In cannabis, interveinal chlorosis is very easy to spot—rather than starting at the edge of leaves, it begins from the inside of a leaf, or leaflets, and gradually spreads outwards.Brown Spots
Cannabis plants that aren't getting enough magnesium often develop dark or reddish spots on their leaves. This is typically the result of further chlorophyll degradation in the leaves, as well as the transportation of magnesium from old leaves to newer ones. Unlike nitrogen, for example, magnesium is a mobile nutrient that plants are able to move around throughout their organism. Hence, when a cannabis plant stops getting enough magnesium from its environment, it naturally begins using magnesium stored in its old leaves to support the growth of new foliage.Red Stems
Some cannabis plants develop purple or reddish stems simply as a result of their genetics. However, sometimes purple or red stems and branches can be a sign of a magnesium deficiency. In fact, the discoloration of petioles (the small stalks that attach a leaf to a branch) is often associated with magnesium deficiency.Fading, Yellowing, and Curling Leaves
As magnesium deficiencies progress, they eventually cause entire leaves to lose their vibrant green color. Eventually, affected leaves will turn yellow and fall from the plant. Again, this is usually due to the loss of chlorophyll caused by the lack of magnesium. Curling leaves with interveinal chlorosis or faded colors is another common sign of advanced magnesium deficiencies in cannabis.Leaf Necrosis
Necrosis refers to the death of cells. Leaf necrosis, therefore, refers to the death of cells in a plant's leaves, and is a common sign of an advancing magnesium deficiency. As mentioned earlier, magnesium plays a key role in the proper growth, development, and differentiation of plant cells. In the severe absence of magnesium, the cells in a cannabis plant's leaves may start to die, causing leaves to wither. Leaf necrosis from a magnesium deficiency usually affects older leaves first, but severe deficiencies may also affect young leaves.Poor Bud Development
Severe nutrient deficiencies during the flowering phase of a cannabis plant's life are very undesirable. While magnesium isn't essential to the development of flowers, a lack of magnesium may still impact a cannabis plant's flowering process. In fact, you may notice the symptoms of a magnesium deficiency get worse as a plant begins flowering (depending on the severity of the deficiency), causing the buds to become airy and perhaps even discolored.Causes of Magnesium Deficiency in Cannabis Plants
There are many potential causes of magnesium deficiency in cannabis plants. These include:- Poor soil composition: The most common cause of magnesium deficiencies in cannabis plants is a lack of magnesium in a plant's soil or growing medium. This usually means there isn't any magnesium-rich organic matter in the soil you bought or prepared. Alternatively, it could also mean that the fertilisers you're using to feed your plants don't contain enough magnesium.
- Improper pH: pH is vital for cannabis plants to properly absorb the nutrients present in their soil. Unfavorable, particularly acidic conditions can interfere with cannabis' ability to take up magnesium.
- Overwatering and/or poor drainage: Overwatering or poor drainage causes a poor environment for the roots and interferes with their ability to absorb all nutrients, including magnesium.
- Using hard water: In the world of cannabis cultivation, and horticulture in general, hard water refers to water with a high-enough mineral content to potentially interfere with how a plant feeds. The exact definition of what constitutes hard and soft water varies among countries. In the US, for example, water with over 120mg/l (120ppm) is considered hard. When you regularly water your plants with hard water, you may be providing them with excess nutrients or minerals that, over time, may interfere with their ability to take up nutrients from their soil or fertiliser. In general, it is always best to water cannabis using soft water, as this serves as a sort of "clean slate" and minimises any potential interactions with your plants' fertiliser or growing medium.
- Nutrient leaching: Nutrients can leach from the soil as a result of heavy watering or exposure to heavy rain. If you over water your plants, you may be causing magnesium to leach from their soil, thereby causing a deficiency.
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- #7
poloshow87
420 Member
Yes I’m using cal mag as well
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- #8
poloshow87
420 Member
I think I might have been overwatering possibly. I was watering until 10% runoff in living soil. How would I correct this?
Greengoodness
Well-Known Member
Why 24hr way to much light period for photoperiods 18/6
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- #10
poloshow87
420 Member
I’ve heard there’s nothing wrong w 24/0.. I’m new to this though
Greengoodness
Well-Known Member
Maybe as a seedling but all plants need a rest period. Auto flower can be done 24hr but i've never heard of running full grown photoperiods 24hr continuously. Maybe someone else will chime in on this one??
Totally missed that one! Thank you!
Photoperiods 18\6
Autos 20\4
I believe everything that grows needs some calculated rest.
budnoob3
Well-Known Member
Agreed 100% to me that seems like it should be common sense, all organisms require a rest period. 24may not kill it but I wouldn’t expect max quality or yield from it.
If you're going organic then you really don't need to water to 'run off'. You're basically washing out your own nutrients that the microbes are making. You really only need to water to run off, to keep the salts from "chemical nutrients" from building up in your roots. With organic, you want it all to stay in the pot (so to speak).
Also call me crazy, but are you're sure that plant is a female?
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- #15
poloshow87
420 Member
It’s supposed to be hopefully. You think it’s a male?
