The 10 Tallest and Biggest Weed Plants in the World

Whether they’ve set up outdoors or indoors, weed growers want to plant and grow tall strains. We get it!

We’ll cover some of the largest weed plants, the basics of growing cannabis, and look at how to balance your yields for enormous buds and efficiency.

Read on to learn more about the biggest weed strains out there!

The Top 10 Tallest Cannabis Plants & Strains

Here are some tallest strains you can grow commercially or at home!

1. Green Crack


  • Flowering Time – 7-8 weeks
  • Yield – Average-High
  • THC – High-Average
  • CBD – Low
  • Flavor Profile – Citrus, Mango

Green Crack is the biggest weed plant you can currently grow, and it boasts Skunk genetics in addition to its crazy height. It’s one of the Sativa strains, but there’s a little bit of Indica mixed in too.

The name doesn’t inspire confidence, so you might also see this strain under “Green Cush” instead. Regardless of what you call it, this bud will keep you buzzing for a long time!

This strong-smelling plant can grow up to 4 meters tall and grace its growers with the yields to match! Make sure you give your plants proper care and enough space to grow.

If you intend to grow some Green Crack for yourself, it’s best to establish it outdoors to ensure it receives lots of sunlight. It’ll grow just as well inside, provided you keep it well-lit.

2. Skunk XL


  • Flowering Time – 7-8 weeks
  • Yield – Average-High
  • THC – Average
  • CBD – Medium
  • Flavor Profile – Earthy, Pine-like, and Fruity

This plant uses the Skunk genetics template to create a larger version of the classic cannabis we all know and love. It may not be as tall as Green Crack above, but this plant can still hit 2 m.

That may not turn heads, but it’s a pleasant surprise considering this strain is 50% Indica, which tends only to be a few feet tall. You can thank Royal Queen Seeds for their dedication to the craft.

Royal Queen Seeds managed to take the classic Skunk strain and backcross it with its descendant plants for an improved version of the original.

Skunk XL is ideal if you’re in a hurry because its growth cycle is 2 months at most, from seed to bud. They’ll typically be ready for plucking and curing by late October.

This plant will grow taller and produce more flowers when grown outdoors, but it won’t significantly affect the yield per plant.

3. Gorilla Glue


  • Flowering Time – 8-9 weeks
  • Yield – Average
  • THC – Very High
  • CBD – Low
  • Flavor Profile – Pine-like, Earthy, Pungent

Gorilla glue isn’t big in the “height” sense, but it packs a higher THC percentage than other cannabis strains. It also has a stronger flavor, so beware if you’re an inexperienced smoker!

You can also find these buds under “Original Glue” or “GG4.” They’re all the same Gorilla Glue and will leave you chilling and sprawled out on the couch.

While this strain will get you high, it’s also pretty strong. Maybe skip this if you’re not a fan of diesel-type strains.

If you want another strain that kicks like a mule, you can pick up some Kimbo Kush or Ken Dawg alternatives.

4. Royal Moby


  • Flowering Time – 9-10 weeks
  • Yield – High
  • THC – High-Average
  • CBD – Low
  • Flavor Profile – Spicy, Lemon-like

This behemoth from Royal Queen seeds is a cross between Haze and White Widow. It can reach up to 3 meters in height when given enough space to grow.

Despite being a Sativa-Indica hybrid, Royal Moby hits like 100% Sativa. This plant’s name comes from its potency and size, and you’ll understand why once you’ve grown a batch yourself!

To let your plants reach their full potential, we advise growing this outdoors, somewhere with tons of sun. It’ll allow you to get a large supply of cannabis every season.

5. Giant White Haze


  • Flowering Time – 9-10 weeks
  • Yield – High
  • THC – High
  • CBD – Very Low
  • Flavor Profile – Minty, Citrus

Like Royal Moby above, Giant White Haze lives up to its name. With a maximum outdoor height of 3 meters, your cannabis will need plenty of room!

It may be big, but this plant’s flavor is surprisingly gentle. With notes of mint and citrus in each hit, you won’t have to worry about smelling skunky when you smoke this weed.

If you’re a greenhorn grower, it may be best to try another strain before attempting to grow this due to the amount of care it needs. Veteran growers should be fine, though.

New smokers should also beware of this strain’s potency. A THC percentage of 21% is nothing to scoff at!

6. Candida CD-1


  • Flowering Time – 9 weeks
  • Yield – Medium
  • THC – Very Low
  • CBD – High
  • Flavor Profile – Lemon, Citrus

In a first for this list, Candida CD-1 is a CBD-heavy cannabis strain instead of going all-in on the THC.

True to their name, Medical Marijuana Genetics has designed this plant to help ease the pain. If cannabis has one great limiter, it’s that it can only have either lots of CBD or lots of THC.

Medical Marijuana Genetics has decided to swing towards the CBD route for this plant, so it’s great for medicinal purposes.

NOTE: You won’t get high from Candida CD-1, but you will feel extremely relaxed.

7. Passion #1


  • Flowering Time – 6 weeks
  • Yield – Medium
  • THC – High – Average
  • CBD – Low
  • Flavor Profile – Spicy, Lemon, Citrus

It’s not unusual to find giants when you go to the Netherlands, but that usually applies to people. Dutch Passion has decided to create giant plants, too!

Dutch Passion has designed these giants to grow best when planted outdoors, and they do! In optimal conditions, a Passion #1 plant will reach 4 m in height.

This strain’s ideal for subtle outdoor operations since the scent it gives off is more like a blend of seasonings than weed.

8. NL5 Haze Mist


  • Flowering Time – 10-11 weeks
  • Yield – High
  • THC – Average
  • CBD – Very Low
  • Flavor Profile – Nutty, Berry-like, Woody

NL5 Haze Mist is a Sativa-dominant cultivar from Greenhouse seeds that grows tall and proud. Don’t wait for this plant, because it’ll take almost 3 months to fully mature.

The wait is worth it, however, because you’ll get a massive supply of weed from a single harvest.

Even if you’d rather ease the pain than get high, this herb is still ideal! Smoking NL5 will help you relax and unwind, making it useful for mild medicinal applications.

9. Frisian Duck


  • Flowering Time – 8 weeks
  • Yield – High
  • THC – Average
  • CBD – Low
  • Flavor Profile – Spicy, Pine-like, Chestnut-like

This odd-looking plant was picked up and refined by Dutch Passion and passed up by most distributors for its unusual looks. But don’t judge this weed plant simply by its appearance!

Frisian Duck can be grown indoors or outside since it doesn’t work like your typical marijuana. Its main benefit is for a stealth grow operation, but this plant also offers a fairly unique flavor.

We’re not sure what Dutch Passion did, but this strain’s not just tall and tasty but also tough! It’ll thrive even when grown in sub-optimal conditions.

9. Amsterdam Amnesia


  • Flowering Time – 9-10 weeks
  • Yield – High
  • THC – High – Average
  • CBD – Very Low
  • Flavor Profile – Herbal, Citrusy

Rounding out this list is another Dutch Passion seed. A well-kept batch of Amsterdam Amnesia reaches for the sky with a height of 3-4 m.

Expect massive yields to match this strain’s height after a relatively short flowering time of 9 to 10 weeks.

Water your Amsterdam Amnesia more during the summer, and give it plenty of nutrients for greater yields!

Tips and Tricks on How to Grow Tall Plants (Cannabis)

Follow these tips to grow tall weed plants. They’ll help you reach for the sky, whether growing indoors or looking to set up some outdoor plants!

1. Dry Your Harvest Properly

After watering and harvesting your cannabis plants, it’s common for your initial yields to shrink after being dried out. This is because they’ll lose water weight as they dry.

However, don’t be discouraged by a low dry weight because the maximum quantity of weed you can gain won’t affect the amount of THC you get from your harvest.

That’s because the THC in your cannabis will evaporate quickly, so ensure that you quickly get your harvest in a nice, airtight container.

A quickly-dried yield typically contains THC percentages higher than a batch left to dry for too long. Don’t let your high THC strains go to waste so late in the game!

Pay attention to your plants during the flowering time and only pick mature, naturally-dried goods to give yourself some breathing room.

2. Get The Timing Right

Different cannabis strains will have different growing season, so your seeds must be planted at the right time if you want a good harvest.

A weed plant will take anywhere from a few weeks to months before it starts flowering, and this period will depend on whether you start with seeds or clones of already-established plants.

Assuming you’re using seeds and taking different cannabis strains into account, you’re looking at a growing cycle of roughly 3-8 months until your cannabis is ready for harvest.

Growers worldwide wait for flowering time, which is, unfortunately, the final stage of growth, but also when you can start picking up buds!

Flowering time will depend on the strain you’ve planted. Some plants like Amnesia Haze bloom in late October, while most outdoor ops will flower after the summer.

3. Don’t Overdo The Nutrients

If you’re a greenhorn from traditional lawn care, you may be tempted to kickstart your cannabis seeds by showering their soil in nutrients.

It may be hard, but don’t do this. Any growing experience you have from other kinds of plants will be helpful here.

Like a common lawn plant, the three main nutrients that marijuana needs are Nitrogen (N), Phosphorous (P), and Potassium (K). There’s also Sulfur, Calcium, and Magnesium.

Follow your fertilizer’s instructions carefully, and don’t overdo it! If you’re tending to outdoor plants, ensure they’re planted in nutrient-rich soil for a large harvest.

4. Pick Your Strains Carefully

Most of the seeds we’ve mentioned here will grow pretty tall, so they’re not suitable for growing indoors. However, don’t let that stop you!

The right strain of cannabis should have high yields and your preferred flavor profile. You’ll also have to decide whether you want a strain with more THC or CBD.

You can’t expect lots of CBD in your weed since CBD conversion is a less efficient biological process than THC.

THC and CBD share the same chemical structure, but these cannabinoids will give you different high levels, so get your strains in order before the growing season!

5. Let There Be Light

If you want your little seeds to make tons of buds, you’ll need to move past the soil and give them appropriate lighting.

They’ll easily hit their theoretical limit with natural sunlight, but not everyone has the space. Growers tending to indoor plants can set up indoor lights for more control over their seeds.

Regardless of whether you’re setting up indoors or in a big open patch of ground, we suggest taming your marijuana’s growth before they start to look like small trees.

This guide is meant to help you grow taller weed plants, but remember that taller plants can signal inadequate light, which will cause lower yields in the long run!

6. Pick Up Some Big Containers

Cannabis plants are like any other plant; They’ll need room to grow. This won’t be a problem if you have enough room to plant them in the ground, but indoor plants need large pots.

You can’t grow a big plant if it’s quickly become root-bound! Veteran growers know this, but a weed plant will sprout long roots that begin to grow around themselves when there isn’t enough room.

Take note of the flowering time of your selected strains, and chart their growth carefully. Once enough time has passed, it may be time to repot your weed plants for maximum yields.

There’s also the material of your containers to consider. Metal pots are sturdy but may cook your weed before harvest time, while clay pots will require more frequent watering.

The ideal container for your cannabis seeds is plastic since they’re affordable, come in various sizes, and are easy to find. However, note that plastic containers aren’t as tough as clay!

Frequently Asked Questions

Learn more about growing massive plants with high CBD percentages here!

What Weed Plants Yield the Most?

If you’re aiming for maximum yield on your weed plants, you should pick up a Sativa dominant strain. These cannabis plants can grow fairly tall and will produce more buds.

While there’s nothing wrong with Indica strain plants, they’re the wrong choice if you’re going for height or yield.

Indica has a shorter flowering time and grows faster, but they’ll always be shorter than Sativa strains. Regardless of the strain you use, the most important thing is its genetic potential.

Certain cannabis strains like Gorilla Glue will produce buds with a higher THC percentage than other cannabis seeds.

How Big Should My Weed Plants Be?

So it’s been a few months since you’ve laid your seeds, and you wonder how slim they will get. Well, that depends on the strain!

The maximum height a marijuana plant can reach will mostly depend on whether it’s Sativa-dominant or Indica-dominant.

Sativa strains will always be taller than Indica, with some Sativa cultivars reaching up to 4 m tall. That’s over double the height of some Indica cultivars, which cap out at 1-2 meters.

Regardless of the cannabis seeds you’ve planted, its max height should be roughly double the length of your plant’s longest cola. Fortunately, you won’t have to look too hard to find the cola.

Since the top of a weed plant receives the most light, that’s also where the longest colas sprout!

Are Higher THC Levels a Marker for Better-Quality Cannabis Strains?

We’ve mentioned plants with higher amounts of THC, but does medical marijuana with greater THC levels get you higher?

You may be shocked to know this, but the amount of THC in your weed won’t affect the high you receive. While THC and CBD are the most well-known cannabinoids in weed, they’re not the only ones.

Before you pick up the highest THC percentage you find, you should know that the terpenes in your weed will affect your enjoyment more than the THC levels.

If you didn’t know, terpenes are what give seasonings like rosemary their signature smell and will affect the taste and flavor of your weeds. Choose your weed based on flavor, not THC level!


Hopefully, we’ve helped you find your new favourite strain. Most of these buds will let you fly high, but some are better for relaxing afternoons and unwinding after a hard day’s work.

Though most of these plants will grow tall, they can easily be tamed for indoor growth with some training.

Whether you’re growing these for medicinal or recreational use, take care of your weed plants, and they’ll return the favor!