what color is weed

Marijuana Colors

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The colors of marijuana plants can vary depending on the type of crop you’re growing and the kind of climate that you’re growing it in. On more than one occasion, experienced growers wake up to find that at some point in their plants’ life cycle some strains have changed from green to purple, maybe blue and in some cases even black. Sometimes this happens simply due to the genes of each strain, like the famous Purple Haze or Blueberry; there are certain phenotypes that can go black in parts during the last few weeks of the flowering period with a minimum temperature of 18ºC and 24ºC indoors, although original Blueberry strains tend to go slightly blue and Purple Haze tends to go from lilac to dark purple, although some Panama and Colombian strains can go slightly pink.

The change in color is generally attributed to the appearance of anthocyanin, a water-soluble pigment that plants generate either due to their genes or due to potassium deficiency, and low temperatures can also influence color change. Sometimes your plants might trick you, showing colors due to nitrogen excess and you end up thinking that the color change is due to its genes; you need to make sure you’re using the right substrate and fertilizers. Nitrogen excess doesn’t just manifest itself by making your plants’ leaves darker; it also shows up in the stems and trunk, which will turn purple. Plants that change color due to genes tend to do so in the buds as well, making for some extremely attractive colorful buds. This color change isn’t adjustable, so it’s not possible to stop your plants changing color if it’s in their genes.

If it’s not in their genes, it could also be due to a lack of phosphorus which tends to come out during the flowering phase, maintaining a healthy green during the growth period and at around the fourth flowering week the leaves will begin turning purple, lilac or slightly red. Although, if you automatically assume that this is because of the temperature, then you’ll continue with your crop as if this feature was simply aesthetic, but it’s an easy mistake to make as your plants are actually giving you an important indication that they’re lacking something, and you’ll definitely notice it in the final yield of your crop. If this is the case, the coloring will sometimes be accompanied by yellowish welts on the leaves which is quite easy to fix; a few waterings with a good fertilizer rich in potassium should be able to improve your plants health, although this solution doesn’t always fix the problem completely. Sometimes the lack of potassium can be due to an excess of salts, in which case you’d need to wash your plants’ roots out and then fertilize. There are some cases in which you can find this balance of nutrients in the substrate but due to an incorrect pH level the coloring can still appear. To solve this, wash the roots and adjust the pH: remember to always water your plants with the correct pH. You’ll know the issue has been solved when your plants’ color doesn’t begin getting worse or darker, and the new leaves grow out green and healthy. This almost always happens with acidic pH levels, and basic pH levels tend to turn the leaves a slight yellow color.

Some strains can also turn purple or blueish in cold temperatures, around 10ºC; remember that cannabis plants prefer temperatures between 20 and 30 degrees, although indica strains can put up with colder temperatures than sativa strains. If you correct the temperature, your plants should go back to their original color. This phenomenon is called Ruby, and it’s the same thing that occurs in blood oranges, which need cooler temperatures to turn red. The appearance of these pigments is due to a change of DNA in just one section of the plant, known as retrotransposons.

Like we said before, these colors are due to anthocyanins, flavonoids that are naturally present in plants and can be found in the leaves, stems, branches, flowers and even in the roots. Depending on the strain and crop conditions, these flavonoids might choose to show themselves, and an acidic pH can also increase the chances of the anthocyanins being released, causing a dark purple color to appear. Their initial function is to protect the plant from UV rays as well as pathogens by changing color, thought of as a defense mechanism against predators.

It seems that anthocyanins have a series of important properties as well; anti-inflammatory, pain relief and neuro-protectant. There are some strict relationships between anthocyanins and CB1 and CB2 receptors, as well as having come to light that a diet rich in anthocyanins can improve health, including the cardiovascular system, preventing obesity etc. although in this particular case anthocyanins in cannabis don’t have any direct effects when smoked, although they might be more effective in infusions like tea.

Author: Fabio Inga
Translation: Ciara Murphy

Marijuana colors are due to the presence of anthocyanins, flavonoids that can appear due to genes, temperature changes or deficiencies.


Cannabis – What does the cover tell you about the book?

Can you tell what’s in your weed just by looking at it? The answer is a firm yes and no.

Sure, sometimes you can tell what the variety is, say Sativa or Indica, but it is not always straightforward figuring out the potency from the color of the bud. Certainly some smart growers have mislabeled Hybrid strains from time to time, due to a misinterpretation of visual appearance in combination with inaccurate “starting” information, urban myth about parentage.

“The most solid visual for potency of bud is an abundance of crystals. Very dark bud is quite often very potent as well. Other visual indicators, colors are more challenging to figure.” – Budsman#3

It’s somewhat like judging a book by its cover; appearance may mean something,then again, it may mean nothing. In the case of marijuana there are some things you can take away from the appearance, if it sparkles, then that surely means it is either doped with glass (this happen can happen with street weed) or it contains crystals packed with cannabinoids. In other words, crystals = potent, more crystals more potent. Mega bright colors usually mean something good is going on . Moldy weed, which should never be smoked, looks and smells moldy.

Before the advent of commercial cannabinoid testing (1990’s), people had to rely mostly on their senses. How did it smell and taste? Nice bud trims and aromas are attractive, but it is the wild colors that really create a lusty impression and blows people away.



Is there any difference between Red Green, Purple- Purple, Red & Green.

Often strains, change color as they flower due to the action of enzymes that produce new molecules. White light is composed of every color in the rainbow. Different molecules absorb certain colors and reflect others. It is the reflected color that the eye sees. Most purified cannabinoids do not have any color at all, but some of the other things in the bud go hand in hand with THC, CBD and other cannabinoids.

Blueberries, grapes and cannabis can contain Anthocyanins, a group of more than 400, water-soluble blue-purple pigmented molecules. Flavonoids are yellow and have an extremely bitter taste. These ingredients are very desirable in nutritional edibles and beverages.

Cannabis THC and CBD rich flowers don’t change color until they are in the fall of their life cycle Think of the tree leaves in fall. Like leaves on a tree ( cannabis is actually a giant herb), colors change from green to red,through orange to yellow. Once the green fades, the enzymes kick in and the buds blossom colorfully ..

There are three popular marijuana species in common use for recreational and medical purposes. Other varieties are used for agricultural and industrial purposes. Sativa is tall and thin, while Indical is short and fat, and the mystical ruderalis is rather scrawny. As accurate DNA test information comes in, we are learning a lot more about the genetics.



Marijuana Scientists now have the ability to look at the genetics of cannabis strains and determine with incredible precision, ancestral information. DNA is used to code proteins which form and build cells and ultimately the entire organism.

Chromosomes are a long chaning of DNA containing many genes (sections of DNA) which code specific proteins that instruct the organism to grow. In humans, there are 23 pairs of chromosomes while the Sativa species has 9 pairs. Each chromosome contains thousands of genes. Genes themselves can contain a million base pairs. A gene test is far superior to what comes out of the grape vine.

For example, before DNA testing was possible in humans, it was thought the Ainu people of Northern Japan of Samurai fame were a lost tribe of Caucasians, due to their robust frames, hairy and white skin features. However, these visual features are only skin deep, and only account for a fraction of the thousands of traits found in humans (blood type, immune cells, etc.). When the geneticists looked under the hood, and inspected Ainu DNA in detail, it was concluded that Ainu are of neither Japanese nor “Caucasian” origin.

AINU of Japan – Some of their genetic features are closer to natives of Tibet and Negroid tribes in the Andaman Islands in the Indian Ocean. Similarly, in marijuana, the genes turning on and off code the production of proteins and enzymes that instruct the plant to make various portions of terpenes, cannabinoids, flavonoids, etc.

How do you tell if your bud is INDICA or SATIVA?

“Sativa bud is generally more leafy/fluffy, light green while Indica tends to be dense/solid dark green, Sill it can be hard to tell with some varieties. You have to smoke it and feel what kind of high you’re experiencing. If your body is relaxed and you’re zoned out, it’s most likely an indica, or an indica dominant strain. If you have a head rush and you’re completely mindfucked, it’s a sativa.” – Street Expert:


Lack of light will produce a sickly looking plant and bud.

Chlorophyll is a plant pigment that sustains life pretty much for the entire food chain for plants and animals. Strangely, the color green is toxic to plants and interferes with photosynthesis, the making of sugar from thin and water. Plants absorb every color and reflect green, which obviously accounts for its color. At the end of its life, as the plant prepares to bear seeds, toxic green light is allowed to penetrate the plant, at which time the genes switch on to code enzymes to produce chemicals that turns the foliage to yellow.

“Trials done with lettuce showed that light with 5% green wavelengths had little impact on total mass, but that when green light levels were increased, it was not only a waste of energy, but it significantly hindered plant growth.” (Kim et al., 2004).

Green light, however can be very useful to stimulate plants to grow denser and hardier in the early stages of growth. Later in the cycle, green light can be used to accelerate maturation. If you want to try this, we suggest you research further into this very interesting field. Lower temperature inhibits chlorophyll production. Temperature and lessening the light tells plants that a change of season is coming, summer to fall. The plant detects these changes and tells itself to get busy maturing buds and making babies (seeds) before it’s too late.

Most medical pot growers find that soil pH should be a little on the acidic side, around 6.0 plus or minus 0.5 pH units. Adjusting the pH also signals the plants enzyme system to produce more or less anthocyanins, flavonoids and cannabinoids? This is an exciting area for researchers in their quest to produce strains rich in certain cannabinoids like CBG, CBC. THCV and others.

Certain strains have so much that you don’t even need to drop temperatures to see the change, as the plant naturally starts to lose chlorophyll at the end of its life. Purple Orangutan has some of the strongest blue and purple hues in the world. Purple hues come to the fore in more neutral pH environments. Blues also enjoy higher pH levels than most cannabis strains.



Red hairs are common, but red buds are rare actually. Pink Flower Shaman, a potent energising strain carries dominant red tones. Predator Pink on the other hand is pink in appearance and is smooth and relaxing. Starving plants of phosphorus can cause leaves and bud to redden too. It would be interesting to know if phosphorus can be used to manipulate cannabinoid content.

“Red hairs indicate that a plant has not been pollinated. Therefore, the plant has more potential for psychoactivity. No seeds= larger, more potent buds, as the plant’s energy is directed to THC/flower production and not seed production. HOWEVER- Red hairs don’t always mean that a particular bud is potent. It seems that years ago, Dutch seed companies picked their breeding stock by appearance,ie plants that had large amounts of hairs. This has let to a widespread dilution of the gene pool, as nearly every stain now has some dutch genetics. This poor decision has set back breeding programs.The proof is always in the puff! ” More


Natural pigments Carotenoids give plants, vegetables and cannabis their distinctive hues of yellow, gold, and orange. Growing in alkaline conditions 5.0 or less will increase the concentration of carotenoids. Near the end of the growth cycle, these molecules dominate as chlorophyll disintegrates.

Orange Bud Varieties include: Olive Oyl, Kandy Skunk, Alien OG. Yellow Wicked OG, Grapefruit, and Lemon Kush.


An abundance of anthocyanins (same pigment found in blueberries).accounts in part for the dark color of the bud. Very dark usually means very potent. Super dark red, green, and purple hues are said to come from Vietnamese landraces such as Vietnamese Black. Black Willy (high CBD) and Black Tuna (super high THC) share the ebony signature.. UV light from the sun or LED lighting is known to increase the production of anthocyanins.


While dark varieties are usually potent, bold colors don’t necessarily correlate. However, bright colors mean the plant is rich in pigments, like anthocyanins and carotenoids which have antioxidant, analgesic, anti-inflammatory, and neuroprotective properties.

Research indicates that some anthocyanins have an affinity for CB1 or CB2 receptors, as do the Cannabinoids THC and CBD; and contribute to the entourage effect. This means that the color of the bud could play a role in selection when a patient finds that a certain color relates to a preferred medicinal effect.

Purple, Red & Green Weed: – A Guide To Bud Colors


There are a million types of schwag, which is slang for low quality street weed obtained from strains that might be better used for making rope. Then again, some schwag could be OK. It’s like a cross between a harsh cigarette, with a little pot and if you’re unlucky, it’s cut with the cheapest street drugs and sprayed with god knows what. If you grew the schwag yourself, and did not use chemicals on it and it works for you, it might actually be beneficial. You would want to confirm your beliefs in the medicinal quality through lab testing; parameters include cannabinoid profile, d8, d9 THC, CBD.

“Going from a smooth, chronic (THC medical grade) high to a thick, rough schwag high has been known to cause shock and stress disorders in visitors from the north who were unaware that cannabis also came in the flavor nasty! Having just returned from Vancouver, British Columbia, where I smoked the best buds of my life, I couldn’t help but close my eyes and try to feel the difference in the hits. The schwag is harsh and thick, similar to smoking a Marlboro Red, with the smoke settling in the back of the throat. Reggie smokers agree that the harshness grows on you, and after smoking southern “regs”, you can smoke just about anything.” – Kat McCloud, Cannabis Culture

MMJDOCTORONLINE Notes: Grower’s Permits, 420 Evaluations, Doctor’s Recommendations, and Cannabis ID Cards application take a few minutes online here. Approval is usually same day, with documents emailed and snail mailed (in non-marijuana marked envelopes). Patients don’t pay unless they are approved by our California licensed doctor.

This 100% online process complies with the guidelines for Telemedicine set by the California Board of Medicine. Documents are valid in both California and Nevada for one year at dispensaries, cannabis clubs, cooperatives, delivery services, MMJ clinics and online suppliers. Cannabis ID cards are especially useful to prove that you’re legal to smoke at events, and to possess and transport marijuana legally.


pH affects plant growth and nutrient availability. pH can affect the availability of nutrients. pH can affect the absorption of nutrients by plant roots pH values above 7.5 cause iron, manganese, copper, zinc and boron ions to be less available to plants. pH values below 6 causes the solubility of phosphoric acid, calcium and magnesium to drop. pH values between 3 and 5 and temperatures above 26 degrees Celsius encourage the development of fungal diseases.

Every indoor gardener knows the important role blue and red light both play in plant development and growth. But how about green light? Chris Bond investigates whether green light may be helpful in some situations.

What Colors mean What? User Discussion Group Highlights

Okay, I’ve smoked a fair share of different strains and the ones of particular quality always seem to have a unique color. I always thought that red hairs and white crystals serve as the storage for the THC, and yet there are certain weed variants that are famed for being dark, or purplish (purple haze, black widow, etc.), and then you’ve got some strains of Kush.

As far as I know, different colors of the weed are due to different levels of photoreactive pigments in the plant pigments are not psycho-active–as only the D-9-THC is the psychoactive compound in the weed. I too have seen exotically pigmented buds in magazine such as High Times and in real-life—and wondered if the exotic colors conferred any “special” potency. To date, I have concluded that the exotic colorations are only superficialities that lend a fancy appearance of the bud/leaf.

Plant pigments are just by-products of the particular strain—think of the analogy like a red rose, yellow rose, pink rose—they all smell like rose–if you were blindfolded– but have a different color. Plant pigments in and of himself do NOT confer any psychoactive effect.

What does the color of your weed mean? What is the most medicinal or potent ? Are bright colors or dark colors better, how about shiny particles