Although tall cannabis strains offer spectacular yields, they definitely require more work than your average plants. Their towering heights mean they take a lot longer to reach maturity when compared to a fast-growing yet tiny autoflowering strain. Additionally, growers should be prepared for relatively high maintenance in terms of pruning and defoliation. This slight increase in labor is all worth it though; the view of mammoth cannabis trees dominating the garden space is a sight to behold.
If you have the space and you're growing anyway, why don't grow big, bigger, biggest? Here is our top 10 tallest cannabis strains available.
Green Gelato hails from the San Francisco Bay Area and is well known to connoisseurs for its delicious taste. This slightly indica-dominant hybrid cross between Sunset Sherbet and Thin Mint Girl Scout Cookies is an impactful concoction of sultry aromas and bold effects. She is pretty too. Long, orange hairs set against purple-green leaves and buds only add to her appeal.
Green Gelato also grows to an impressive size; up to 120cm indoors and 2m out. Flowering takes just 8–9 weeks, and she produces small and medium nugs clustered tightly together, rather than a long, single cola. Both topping and trimming are advised to help this strain reach her full potential, but she responds well to both. Grown indoors, cultivators can expect up to 500–700g/m², or 600–800g/plant when grown outdoors.
With dominant Kush undertones, this 25% THC strain inflicts an unforgettable experience. The aroma is enticing—a mix of baked goods and forest fruits. The high is euphoric at first, transitioning to a deeply tranquil experience as the Kush kicks in. The experience is intense, and can bring most stoners close to sensory overload.
This famous powerhouse boasts a classic sativa lineage combined with a dense, high-altitude indica influence. Two landrace strains have been combined to create this THC monster of a hybrid. The effect is one that even the most experienced aficionados find compelling.
Amnesia Haze is known to be a lanky, majestic plant, easily reaching up to 140cm indoors and 250cm out. This plant loves warm weather. Cultivators in southern Spain, northern Australia, California, or North Africa will all see outstanding results outdoors. That said, flowering takes time. The long buds need between 12 and 20 weeks (13 on average) to mature. Despite their long maturation time, 600g/m² is not unreasonable to expect when grown indoors.
As she nears harvest, her long flower clusters glitter with crystalline trichomes exhibiting a complex flavour profile. Indeed, the nugs seem to be glazed with an exotic cardamom, lime, marjoram, and mandarin-flavoured toffee that literally sparkles. The heavy trichome production of this hybrid makes the strain prized for hash and other cannabis extractions. This plant produces honey-coloured, 22% THC-infused resin that is a sight to behold and tickles the nose with an incomparable aroma.
Monster is just that—a major producer with a tall, imposing stature of 2–4 metres! A 20% THC hybrid with 20% indica and 80% sativa genetics, Monster derives from an international list of influences. Breeders crossed G13 Hash Plant with a hybrid from South America, creating a plant that emerged with first prize in the Resin category at Spannabis 2009.
Grown indoors, Monster can be fairly humble in height. The plant reaches around 120cm, but manages to produce 500–1000g/m². However, Monster exceeds its reputation when grown outdoors, reaching up to 4m in height. Ladders and other outdoor equipment will be necessary to trim and harvest this bad boy. When allowed to reach its full potential, Monster can produce up to 2.8kg/plant. Her flowering time is a brief 65–70 days.
The effect induced by Monster is influenced by high levels of THC and an array of invigorating terpenes. Expect a heady buzz accompanied by uplifting, motivating, and happy feelings. Monster’s aroma is pleasantly woody and spicy, and its award-winning resin production makes it great for extracts and hash.
This whale of a sativa-dominant hybrid has a prestigious pedigree, winning Best Outdoor Cannabis Seed at Copa Cannamex 2015, Best Sativa at the Valencia THC Cup in 2011, and Best Sativa at the Summer Cup Canarias the same year.
Moby Dick is a White Widow and Haze cross boasting a 21% THC level and some spectacular yields. Not recommended for stealth operations, this formidable strain can reach up to 3.5m when grown outdoors in the right conditions—and this plant likes warm weather and needs lots of nutrition. Outdoor growers have experienced as much as 1.5kg of dank and highly resinous buds per plant. Indoors, she grows to a more manageable height of between 120 and 140cm and produces up to 700g/m².
With floral, spicy, and lemon undertones, Moby Dick triggers a delicious, energetic high. This mythic beast of a strain has earned its reputation the good old-fashioned way. That said, she is not recommended for novice cultivators, in part because of the care and attention she needs to deliver the best results.
The winner of the Highlife Cannabis Cup Amsterdam in 2006, Dutch Dragon is an intriguing cross between a landrace Swaziland sativa and an unknown Dutch hybrid. The result is an energetic, surging sativa with one mighty high.
This plant needs a lot of headspace. Indoors, expect weed trees by the end of the 10-week bloom period. In grow tents or rooms, it is absolutely necessary to top and train this plant. Outdoors in a Mediterranean climate, one should also prune Dutch Dragon to ensure a healthy, fat harvest come October. Indoors, growers can expect a yield of up to 500g/m². Outdoors, it is possible to harvest between 700 and 1000g/plant.
With sweet, tangy, and citrusy terpenes, alongside an energetic, uplifting high, this strain keeps sativa lovers coming back for more. That said, the instant cerebral blast may be a bit too intense for total novices. Unfortunately, this is also not an ideal plant to grow if you are trying to do so in secret. As her buds mature, she exudes a delicious scent that literally hangs in the air.
Jack La Mota is named after Jack Herer, a legendary cannabis advocate and grower. This interesting interpretation of the Jack Herer strain is hybrid mix of Northern Lights #5 with Haze and Skunk genetics. Jack La Mota is a 75% sativa, 25% indica mix with some seriously mind-blowing tastes of fruity pine and citrus skunk. She also has a respectable THC level of 15–20%.
This plant is a bit of a beast, but the results are satisfying. Reaching up to 3m outdoors, each plant can churn out up to a kilo of bud in ideal conditions. Indoors, it does not do so well, in part because it is difficult to wrangle in smaller spaces. However, she can still produce up to 500g/m² if you treat her right. Just be prepared to wait; Jack La Mota has a flowering time of 11–12 weeks.
The high produced by this strain is energetic, powerful, and inspiring. Those who enjoy daytime smoking are most likely to gravitate to these buds. However, between her impact and her growing eccentricities, Jack La Mota is not recommended for novice smokers or cultivators.
Dedoverde Haze is an 80% sativa strain that clocks in with an 18–24% THC level. It is a cross of classic California Haze hybrids developed in the 60s and 70s with Amnesia straight from Holland.
Dedo verde means “green finger” in Spanish, and this plant clearly lives up to its title. The strain loves Mediterranean climates where it can stretch to 3m in height and be harvested well into October. As you might imagine, this is a strain better suited for outdoor than indoor grows; however, she can deliver in both settings. Indoors, she takes about 65–70 days to flower, ultimately yielding 500–600g/m² with sufficient training. Outdoors, she delivers high yields of between 600 and 900g/plant.
The flavours of this delicious strain are a mix of citrus, pine, cedar, spice, and fuel; alongside high THC levels, they create a delicious, cerebral high that’s worth celebrating. The resin production of Dedoverde Haze is also very high, making her a suitable candidate for concentrates and hash, not to mention edibles.
This super-potent Spanish hybrid exhibits the kind of power and performance modern cannabis connoisseurs expect. A lovely twist on a classic, it is a highly robust plant that also packs superb potency and a dynamic high.
The size of this plant is what gives this strain its well-earned name. Royal Moby has no trouble reaching up to 2m indoors and 3m outdoors, where it thrives in tropical and Mediterranean climates. This is not a good plant to grow for those with little space. She also needs a lot of care and nourishment. Commercial growers who have the room love this plant just because of the yields. After a flowering time of only 9–10 weeks—one of her few indica-driven traits—Royal Moby produces a large yield, particularly outdoors. Here, it is possible to get as much as a kilo from every plant. Inside, you can expect up to 600g/m².
This is one of the strongest, most cerebral highs on the market. For that reason, Royal Moby is best reserved for specific occasions. But with rich flavours of berries, citrus, and herbs, it might be difficult to keep your hands off the stash jar.
NL5 Haze Mist won first place at the High Times Cannabis Cup in 1996, and her reputation continues to wave the flag for cannabis strains that are large and in charge. Her 70% sativa dominance is responsible for such an imposing silhouette. Deriving from three already-renowned strains, this 15% THC hybrid is a cross between NL #5, original Haze, and Kali Mist. Its uplifting high will keep you smiling all day, as will its flavours of sweet, fresh pine.
This award-winning strain has 2–3 phenotypes, which will bloom in a reasonable 10–12 weeks indoors. Low-stress training and the ScrOG method are highly recommended to keep her stretchy growth under control. The buds also tend to foxtail, so don’t be alarmed if the flowers don’t look like what you normally see. Once harvest rolls around, indoor growers can rake in up to 650–700g/m².
Outdoors in warmer climates, this baby will be ready for harvest in late October, with impressive harvests of about 750–800g/plant. NL5 Haze Mist is generally easy to grow, making her a perfect strain for beginners, including those looking to experiment with trimming and pruning.
The tasty and uplifting Giant White Haze is a powerhouse of a cannabis plant. A cross between Haze and White Widow, it is a stable hybrid loaded with flavour and potency.
This strain also lives up to its name. Large, abundant plants deliver top-shelf yields in just 9–10 weeks of bloom. Indoor plants can grow up to 2m and deliver up to 600g/m². Outdoors, however, is where this baby absolutely thrives; she can reach up to 3m, and churns out crazy yields.
Given its size, this is not a plant recommended for budding cultivators; but with a little experience behind you, she is a joy to grow, and, of course, experience. She may be a bit of a handful to manage, but her flavour and effect are absolutely worth the effort. Giant White Haze has a citrusy, minty taste and a smooth smoke, giving rise to a euphoric mind-body high powered by 20% THC. The initial effect is almost instantaneous, and enables users to carry out daily tasks with a smile on their face, or sit back and relax on a lazy, slow afternoon.
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