Purple Cannabis Seeds

Why Do Some Cannabis Strains Turn Purple?

The purple, violet and sometimes reddish colors seen in cannabis come largely from pigments called anthocyanins. These naturally occurring plant pigments are present in many species and can become particularly visible in cannabis varieties with the right genetic background.

Genetics are therefore the starting point. Some strains have a much stronger tendency to develop purple pigmentation than others, which is why we've brought together genetics specifically known for producing these colors in this collection. If you want to understand the genetics and growing conditions behind the color in more detail, our guide to how to turn weed purple takes a closer look at what actually influences purple pigmentation.

Are Purple Cannabis Plants Always Purple?

No. Even when you're growing genetics known for purple coloration, the exact appearance can vary. Different plants can express pigmentation to different degrees, and environmental conditions can influence how visible those colors become.

That means we'd never treat a purple seed as a guarantee that every plant will finish with exactly the same shade or intensity. Good purple genetics increase the potential for those characteristics to appear, but you're still growing a living plant rather than reproducing an identical color from seed.

Does Cold Weather Make Cannabis Turn Purple?

Cooler temperatures, particularly during flowering, can encourage purple pigmentation to become more noticeable in genetically predisposed plants. This is one reason growers sometimes associate colder conditions with purple cannabis.

Temperature alone isn't enough to turn any cannabis strain purple, however. The genetics need to have the potential to express those pigments in the first place. We also wouldn't recommend deliberately exposing plants to unhealthy temperature extremes purely to chase a darker color, as maintaining healthy growing conditions is more important than appearance.

Can Cannabis Flowers and Leaves Both Turn Purple?

Yes. Depending on the strain, purple pigmentation can appear in different parts of the plant. Some genetics develop purple and violet shades predominantly in the flowers, while others can show considerable color across the surrounding leaves and other plant tissue as flowering progresses.

The shade can vary too. Purple cannabis isn't limited to one particular color, and individual plants can show combinations of violet, lavender, deep purple, red and occasionally almost black-looking pigmentation. Purple isn't the only distinctive color found in cannabis either, so you can also explore our blue cannabis seeds and white cannabis seeds if appearance is an important part of what you want to grow.

Choosing the Right Purple Cannabis Seeds

If color is your main reason for exploring this collection, start by looking at how individual strains typically express their purple characteristics. Some are known for particularly dark flowers, while others produce more subtle color across the flowers and surrounding leaves.

From there, we'd choose exactly as we would with any other cannabis strain. Consider the plant's size, flowering time, potency, effects, expected yield and difficulty to grow. If you want to start with one of the best-known names in purple cannabis, Granddaddy Purple is a classic example, known for the deep purple colors that helped make these genetics so recognizable.

Purple Cannabis Seeds FAQs

What makes cannabis plants turn purple?

Purple coloration is primarily associated with plant pigments called anthocyanins. Genetics determine whether a cannabis plant has a strong tendency to express these colors, while growing conditions can influence how strongly the pigmentation appears.

Will every purple cannabis seed produce a purple plant?

Not necessarily. Seeds from purple genetics have the potential to develop purple pigmentation, but the intensity can vary between individual plants and growing environments. We wouldn't guarantee that every seed will produce exactly the same color expression.

Do purple cannabis plants need cold temperatures?

No. Genetics are the most important starting point. Cooler temperatures can encourage pigmentation in some genetically predisposed strains, but you don't need to expose plants to excessively cold conditions to grow purple cannabis.

Is purple cannabis stronger than green cannabis?

No. Purple pigmentation doesn't tell you how potent a strain is. THC content depends on the genetics and cannabinoid profile of the individual strain, so we'd recommend checking its specifications rather than using color as an indication of strength.

Can autoflower cannabis plants turn purple?

Yes. Purple pigmentation isn't limited to photoperiod cannabis. Autoflower genetics can also produce purple flowers and foliage when the appropriate color traits have been incorporated into the strain.