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When we think about the different cannabis varieties, we usually picture the two most predominant subtypes: sativa and indica. However, another important variety has often been overlooked: Cannabis ruderalis.
What makes cannabis ruderalis special
Ruderalis cannabis is usually considered a third subspecies alongside the other two mentioned, with its own physical and phytochemical properties. This variety contains less THC, under 3%, compared to its relatives (other varieties can contain more than 15%), but is much richer in CBD.
The word “ruderalis” comes from the term “ruderal,” which in turn derives from the Latin ruderis, meaning dirt. It is used to describe plants that grow in uncultivated lands, where rubble is dumped or areas that are heavily altered by human activity.
Therefore, this cannabis plant is classified as a type of weed that grows wild, adapting to the most extreme environmental conditions. Ruderalis cannabis is a variety native to Central Asia and Eastern Europe, where it still grows wild. It has one quality that sets it apart from sativa and indica: it’s autoflowering. This means it flowers over time rather than in response to a change in available light.
Characteristics of an autoflowering plant
Autoflowering plants start developing buds on their own after 3 to 4 weeks of vegetative growth. It is believed that ruderalis developed this ability to adapt to short summers, but with many hours of sunlight, in its natural habitat.
Although this variety is not very attractive for recreational use due to its low tetrahydrocannabinol content, its autoflowering capability has made it highly sought after for breeding new strains. Ruderalis can be crossed with high-quality sativa, indica, or hybrid strains to create new strains with autoflowering characteristics. This way, growers can obtain plants with a good THC content and automatic flowering under an 18–20 hour light cycle.
Genetic advantages of Ruderalis
As we’ve seen, ruderalis marijuana does not depend on light to flower, and thanks to that, its cultivation cycle is faster. One of the biggest advantages this offers is that it reduces the risk of losing the harvest due to autumn weather. Moreover, several harvests can be obtained per season and per year. That’s why many growers are choosing autoflowering strains (also known as autos), and many seed banks are experimenting with ruderalis genetics to cross them with indicas and sativas to create autoflowering hybrids that provide multiple harvests per year, regardless of light hours.
Differences between Sativa, Indica, and Ruderalis Cannabis
These are the major differences between the three main cannabis strains.
Cannabis sativa
Cannabis sativa grows in warm, sunny climates. These are tall, slender plants (they can exceed three meters in height). Their leaves have long, narrow leaflets. They produce a stimulating and euphoric cerebral effect.
Cannabis indica
Cannabis indica grows in colder areas, so it’s more robust and resistant. It has a bush-like appearance and is shorter. The leaflets are wide. It produces more of a body high, with relaxing effects that promote sleep and stimulate appetite.
Cannabis ruderalis
Cannabis ruderalis can adapt to any environment and climate, hot or cold. It grows like a weed in rubble areas. The plants are small and very compact with three main leaf tips and two small ones. The buds are thick and small. THC levels are low, while CBD levels are similar to hemp.
| Characteristic | Cannabis Sativa | Cannabis Indica | Cannabis Ruderalis |
| Origin | Equatorial regions like Africa, South America, and Southeast Asia. | Mountainous regions of Central Asia, such as Afghanistan, Pakistan, and Tibet. | Eastern Europe, Russia, and Central Asia. |
| Plant appearance | Tall and slender plants, up to 4.5 meters tall, with long narrow leaves. | Shorter, bushier plants with wide, short leaves. | Small, compact plants between 30 and 80 cm tall, with short, wide leaves. |
| Adaptability | Prefers warm, sunny climates; sensitive to climate changes and requires specific care. | Adapted to colder, mountainous climates; resilient and tolerant to adverse conditions. | Highly resilient, can grow in harsh conditions, including cold and high altitudes. |
| Life cycle | Slower flowering, takes 10 to 16 weeks. | Faster flowering, usually 6 to 8 weeks. | Short life cycle, autoflowers 21–30 days after germination regardless of light cycle. |
| Cannabinoid content | High THC, low CBD, producing energizing, euphoric effects. | Higher CBD, lower THC than sativa, more relaxing and sedative effects. | Low THC and moderate CBD, minimal psychoactive effects. |
| Effects | Stimulating, ideal for daytime; boosts mood and creativity. | Relaxing, ide |
Is hemp the same as cannabis ruderalis?
Sometimes the term hemp is used to refer to cannabis varieties that have been selectively bred to keep THC levels to a minimum. This is not correct, as hemp is a different plant species from cannabis ruderalis. For a variety to be considered hemp, its THC content must be below 0.3%. Although ruderalis has a low concentration—about 3%—that amount is more than five times the limit allowed in hemp.
Another key difference is that hemp has unique versatility, as it has been domesticated and used by humans for millennia. Today, hemp can be used to make medicinal supplements, paper, textiles, food, and even biofuels.
Advantages of cannabis ruderalis
As we’ve seen, this subspecies is truly interesting on many levels. We can summarize its advantages in the following points:
Autoflowering with a fast life cycle
Unlike sativa or indica varieties, ruderalis marijuana flowers automatically based on its age and not on the photoperiod (i.e., the hours of light in different seasons). This makes it ideal for climates with short seasons or for spaces with limited light.
Resistant to adverse conditions
Being a wild variety, it is very resistant to cold, pests, and diseases. Because of this, it can withstand the common mistakes made by beginner growers and develop in less fertile soils.
Low maintenance
Due to its great resilience, ruderalis marijuana requires less care and attention than indica and sativa varieties. Again, it’s an excellent choice for people starting out in cannabis cultivation.
Small and compact size
Thanks to its size, ruderalis is a very discreet plant, ideal for small spaces or for those seeking privacy.
Crossbreeding potential
This variety has very interesting genetic applications, as it provides the best foundation for creating autoflowering hybrids with a richer cannabinoid and terpene profile.
Cannabinoid balance
Although cannabis ruderalis is not used recreationally, as its psychoactive effects are nearly imperceptible, it is rich in CBD, making it highly suitable for treating conditions such as anxiety, epilepsy, or inflammation.
As you can see, THC content isn’t the only trait that adds value to a cannabis strain.
