Why Are Some Cannabis Flowers Purple? The Science Behind Purple Weed

Quick Links

sativa strains

Purple weed stands out with its bold, vibrant colors—and it’s not just for show. From cool temperature shifts to plant chemistry, there’s real science behind those colorful buds. Whether you’ve seen them in person or online while searching to buy purple weed, this guide will explain exactly why some cannabis flower turns purple—and whether that color means higher quality.


Purple Weed Explained: What Makes Cannabis Turn Purple?

Not all weed is green. Some cannabis flowers develop beautiful hues of purple, blue, and even deep red. The main reason? A pigment called anthocyanin. These are natural compounds found in many plants, like blueberries and red cabbage, and they show up in cannabis too.

“People are drawn to purple weed because it looks unique,” says Kristina, co-owner of ROLL’D Cannabis Co. in Kanata. “But it’s the combination of color, aroma, and effects that really sets some strains apart.”

Here’s how it works:

  • Anthocyanins in cannabis become more active as chlorophyll (the green pigment) fades, especially during cooler temperatures.
  • These pigments give off purple, red, or blue tones, depending on the pH of the plant tissue.
  • Some strains are naturally rich in anthocyanins due to genetic traits, while others show color changes due to environmental factors.

Anthocyanins in Cannabis: Why Some Strains Have Purple Hues

Anthocyanins don’t affect potency or aroma, but they do add visual appeal. They’re antioxidants that build up in the plant’s leaves, stems, and buds under the right conditions.

Factors that increase anthocyanin production:

  • Cooler nighttime temperatures during late flowering
  • Strain genetics (some plants are bred for color)
  • Proper light exposure
  • Balanced nutrients

“A lot of customers ask if purple weed is stronger,” says Tyler, co-owner of ROLL’D. “The answer is—it depends on the strain. Color doesn’t always mean more THC, but many high-THC purple buds do exist, and we help people find ones that match their needs.”


Colorful Buds: What Causes Strain Color Variations in Cannabis

You might notice other colors too—orange hairs, blue tones, or deep red. These come from different plant compounds and pigments, but purple is often the most eye-catching.

Strain colors can vary due to:

  • Genetic makeup (some strains are bred for bold colors)
  • pH levels in the growing medium
  • Nutrient levels, especially phosphorus
  • Drying and curing methods, which can either fade or enhance colors

Want to explore more than just purple? You can now shop colorful cannabis buds and see the full spectrum available in store or online.


Purple Weed vs Green Weed: What’s the Difference?

Let’s clear up a myth: Purple weed isn’t automatically better. The color is mostly visual and does not guarantee stronger effects, smoother smoke, or better terpenes. However, some purple weed strains for sale do rank high for flavor and potency.

Key comparisons:

  • Green weed: classic look, wide range of potencies, often higher in chlorophyll
  • Purple weed: visually unique, often high in anthocyanins, great for those who value aesthetics

Buying Purple Cannabis: What You Should Know About the Color and Quality

Thinking about trying purple flower? Here’s what you should know before you order anthocyanin-rich cannabis:

  • Color doesn’t equal strength, so always check the lab results for THC and terpene profiles
  • Choose premium purple flower near me by checking local reviews and dispensary quality
  • Look for strains that naturally express color without chemical tricks

At ROLL’D Cannabis Co. in Kanata, we carry a wide selection of top-rated purple weed and colorful strain selections online, so customers can explore all the options firsthand.


Your Guide to Exploring Purple Cannabis in Kanata

If you’re ready to experience purple marijuana flowers in person, ROLL’D Cannabis Co. has you covered. We’re proud to offer a curated lineup of colorful, lab-tested strains that combine stunning looks with real quality.

“We love helping people discover new strains,” says Kristina. “Whether you’re looking for something vibrant to share or a high-THC purple bud for a relaxing night in, our team can guide you to the perfect pick.”


Ready to explore purple weed?
Visit ROLL’D Cannabis Co. in Kanata or browse our menu online to shop colorful cannabis buds and find your new favorite strain. Whether you’re after looks, effects, or something in between, we’ll help you find a flower worth lighting up.