What Is Limonene? The Citrus Terpene in Your Weed, Its Benefits and Top Strains

Limonene is a terpene, an aromatic compound found in citrus peels and in many cannabis strains, that gives off that bright lemon-orange scent and is being studied for mood-lifting, anti-anxiety, anti-inflammatory and antifungal effects. It occurs naturally in plants like lemons, oranges and tangerines, and it's the reason those fruits smell the way they do.

Limonene has gotten popular thanks to its range of potential uses. It shows up in the food, cosmetics and medicinal industries because of its antioxidant and anti-inflammatory properties and its reputation as a stress reliever.

Cannabis terpenes: what are limonene's potential health benefits?

Limonene, found in cannabis and a variety of citrus fruits, has drawn attention for its potential health benefits. It's been the subject of plenty of scientific studies, which point to these properties:

1. Antidepressant: Limonene may lift mood by helping restore the body's balance (homeostasis). Some studies have observed improvements in hormone levels and immune function in patients with clinical depression, which has researchers looking at it as a natural mood support.
2. Antifungal: Limonene inhibits the growth of fungi, especially the kinds that spoil food, which makes it a promising tool against fungal infections.
3. Anti-inflammatory: Research suggests limonene has anti-inflammatory properties that could help with conditions like asthma and colitis by reducing inflammation and supporting gut health.
4. Anti-cancer: Lab and animal studies suggest limonene may slow tumor growth, especially in breast cancer, and it has been seen to trigger apoptosis (programmed cell death) in cancer cells. Whether that translates to preventing or treating cancer in people is still an open question.
5. Anti-anxiety: Limonene appears to have anti-anxiety effects, meaning it may help ease anxiety and stress and offer some natural support for mental well-being.
6. Immune booster: Studies suggest limonene can have a positive effect on the immune system, supporting a healthy immune response.

For all its potential, limonene can cause allergic reactions in some people, according to a study from the UK. Even so, its overall safety profile is high and it's considered non-toxic to humans.

Which cannabis strains are high in limonene?

Limonene is one of the most abundant terpenes in cannabis, second only to myrcene. A lemony smell is often taken as a sign of lots of limonene, but that's not always the case.

The only way to know for sure that a strain carries a significant amount of limonene is a lab test. If you're after high-limonene strains, here are a couple we recommend:

• Amnesia Kush: This strain brings together two cannabis icons, one from Holland and one from California. It pairs the flavor and resilience of OG Kush with the sativa punch of Amnesia Haze. Thanks to its Kush heritage, Amnesia Kush has high limonene levels and a potent effect, with THC that can top 20%. It's a vigorous, easy-to-grow plant that handles humid climates well thanks to its sativa dominance.
• Purple Afghan Kush: Considered one of the most beautiful and mysterious strains around, Purple Afghan Kush surprises with pineapple and tropical fruit flavors that hide a solid dose of limonene. Despite all that limonene, its high isn't the typical "sativa" buzz. With high THC levels, it brings on muscle relaxation along with a long-lasting sense of physical and mental calm that doesn't overwhelm.

Try these strains and see for yourself how limonene and other terpenes can shape the effects of cannabis, always with proper guidance and a big-picture approach to your well-being.

Terpenes and trichomes: how do you boost limonene in your plants?

Terpene experts have found that you can boost the terpene profile of cannabis plants with a blue light treatment in the days before harvest.

With a blue light treatment, you cut the red part of the spectrum for the last 2–4 days before harvest, so the plants only get blue light. Growers report a significant jump in terpene production from this trick.

There are several theories about how and why it works, but plenty of growers who've tried it say the results are real.

Red light is crucial for flowering and bud growth, but its job is basically done right before harvest, so you can switch off the red channels on your LEDs a few days early without hurting your final yield.

The theory is that with only blue light, the plant shifts its photosynthetic focus from building biomass to producing terpenes.