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By Luke Sumpter

Growing cannabis indoors comes with a host of benefits. For a start, you have almost complete control over your growing space. Sure, you might not feel the sun beaming down as you inspect your plants, but you’ll avoid heavy downpours, gale-force winds, and frosty conditions. You’ll also get to optimise other variables to your benefit, including temperature, humidity, and lighting. And for what it’s worth, you’ll find it hard to replicate the feeling of solitude and peace that washes over you upon stepping into your grow tent after a hard day's work.

If you’re setting up an indoor grow for the first time, you’ll need to get a gear list together and tick things off as you go. Alongside a grow tent, lights, and containers, choosing suitable genetics is of the utmost importance. Even if you don’t have a lot of space, you still want to get a great bang for your buck. With that in mind, we’ve compiled a list of our highest-yielding indoor cannabis varieties. These strains don’t grow overly big, but still provide significant yields of potent flowers.

1. Lemon Shining Silver Haze

Lemon Shining Silver Haze is an instant favourite among Haze-loving indoor growers. Our breeders created this powerhouse by crossing Lemon Skunk with Shining Silver Haze. Despite its sativa-dominant nature, Lemon Shining Silver Haze reaches a medium height, but retains that energetic and cerebral high Hazes are known for. As well as being easy to manage, her dense and resinous colas pack an impressive 21% THC.

After hitting a blunt, bowl, or joint loaded with these flowers, you’ll experience a wave of citrus striking your taste buds. Shortly after, you’ll feel her cognitive high start to set in, inspiring creative thoughts as it goes. But what about her yields? No worries here—Lemon Shining Silver Haze is capable of returning up to 650g/m² when grown under powerful lights.

Lemon Shining Silver Haze
Lemon Skunk x Shining Silver Haze
600 - 650 gr/m2
80 - 140 cm
9 - 10 weeks
THC: 21%
Sativa 75% Indica 25%
650 - 700 gr/plant
130 - 170 cm
Middle of October
Balanced, Clear, Stoned

Buy Lemon Shining Silver Haze

2. Amnesia Haze

It won’t take you long to see this name plastered on jars in a dispensary or coffeeshop. Despite its rapid ascent to fame, Amnesia Haze has stood the test of time in Amsterdam and further afield. But what makes this strain different? Well, high levels of THC, a deeply relaxing high, and brilliant yields are a good place to start.

Our version of Amnesia Haze stems directly from the original. The cultivar produces slender colas doused in resin containing 22% THC. Once you light her up, you’ll enjoy moreish flavours of citrus, earth, herbs, and pepper as a muscle-melting body high begins to creep in. After a flowering time of 10–11 weeks, expect to reap a bounty of up to 650g/m² indoors.

Amnesia Haze
Original Amnesia Haze
600 - 650 gr/m2
80 - 140 cm
10 - 11 weeks
THC: 22%
Sativa 70% Indica 30%
650 - 700 gr/plant
175 - 210 cm
Late October
Long Lasting , Physically Relaxing, Powerful

Buy Amnesia Haze

3. Green Gelato

The ears of stoners prick at the sound of the word “Gelato”. We took the parents of the original Gelato (Sunset Sherbet and Thin Mint Girl Scout Cookies) and put our own spin on this legendary variety. In doing so, our breeders created Green Gelato, a slightly indica-dominant hybrid that will blow your mind with an outlandish THC content of 27%. You’re best off reserving these flowers for relaxing afternoons and evenings when you’ve accomplished your daily tasks.

Green Gelato produces small and compact buds that seem innocent enough at first glance. Alongside sky-high levels of THC, these flowers develop a terpene profile characterised by notes of citrus, earth, mint, pepper, and vanilla. And, of course, Green Gelato ranks exceptionally high in our catalogue in terms of indoor yield potential, offering up to 700g/m².

Green Gelato
Sunset Sherbet x Thin Mint Girl Scout Cookies
500 - 700 gr/m²
80 - 120 cm
8 - 10 weeks
THC: 27%
Sativa 45% Indica 55%
800 gr/plant
150 - 200 cm
Early October
Clear, Physically Relaxing

Buy Green Gelato

4. Sweet ZZ

Sweet ZZ stands as one of our most popular strains, and it won’t take you long to figure out why. This cultivar ticks all of the boxes, boasting a THC content of 22%, stunning purple-green colas, sweet flavours, and the ability to churn out a significant yield even in confined indoor spaces. Our breeders brought this variety to life by crossing Grape Ape and Grapefruit, giving rise to a hybrid featuring 80% indica and 20% sativa genes.

If you’re searching for an indica that never fails to cast a heavy, euphoric high over the body and mind, then you just found it. We designed this variety for late-night smoking sessions fuelled by sugary snacks and deep conversations. Her delicious candy-like flavours are best enjoyed through a vape or infused into brownies, cakes, and other sweet treats. Raise this strain with high-powered lights and solid nutrition, and she’ll repay you with 550–600g/m² of sweet buds indoors.

Sweet ZZ
Grape Ape x Grapefruit
550 - 600 gr/m2
80 - 140 cm
7 - 9 weeks
THC: 22%
Sativa 20% Indica 80%
500 - 550 gr/plant
160 - 200 cm
Late September
Calming, Stoned

Buy Sweet ZZ

5. Blue Gelato

RQS breeders have contributed to the Gelato family tree in more ways than one. Blue Gelato shares the same parents as the original Gelato, but with a significant fruity twist. We added legendary Blueberry genetics into the mix to take her flavour profile to another level. This resulted in a phytochemical mix that pairs a THC content of 23% with one of the most unique terpene profiles you’ll find; prepare for notes of blueberry, diesel, and earth in perfect harmony.

As you can imagine, this chemical cocktail results in red eyes and a surge of dopamine that will have you chatting and laughing for hours to come. Blaze these buds during low-key smoking sessions with close friends or at parties filled with stoners. You’ll find yourself having fun either way! After tending to her throughout the growing cycle, you can expect a rewarding yield of up to 600g/m² indoors.

Blue Gelato
Blueberry x Thin Mint Girl Scout Cookies x Sunset Sherbert
550 - 600 gr/m2
80 - 130 cm
9 - 10 weeks
THC: 23%
Sativa 20% Indica 80%
500 - 600 gr/plant
150 - 200 cm
October
Balanced, Physically Relaxing, Uplifting

Buy Blue Gelato

6. Royal Skywalker

Royal Skywalker won’t endow you with the ability to wield the Force, but you’ll certainly get a taste of the inner tranquillity of a Jedi master. This indica-dominant variety will simultaneously ground your body while catapulting your mind to the stars. A THC level of 25% means Padawan smokers should approach her with caution—it only takes a couple of tokes to get a feel for her power.

As a descendant of Blueberry and Mazar, flavours of berries, citrus, and pepper accompany her hard-hitting high. Her indica morphology becomes very apparent early on, and continues to shine as she develops large, thick colas sporting broad leaflets and a heavy trichome count. The best part? You’ll get to rake in up to 600g/m² of these buds come harvest time.

Royal Skywalker
Blueberry x Mazar
550 - 600 gr/m2
80 - 130 cm
9 - 10 weeks
THC: 25%
Sativa 40% Indica 60%
500 - 600 gr/plant
150 - 200 cm
October
Clear, Physically Relaxing

Buy Royal Skywalker

7. Critical

Easy to grow. Compact. Productive. What else could you ask for from an indoor strain? Critical has gained a reputation for her ease and versatility. She peaks at a height of 140cm, but sufficient training can keep her at a stealthier 80cm without reducing yields. Our breeders created this strain using Afghan and Skunk, meaning she leans more to the indica side. Harnessing a moderate THC content of 18%, she exerts a relaxing high that won’t push you over the edge. Blaze these buds at any time of day to feel grounded. Tastes of candy, fruit, pine, and Skunk are a big bonus.

Keep Critical at the smaller end of the height spectrum, and you’ll have an easy time cultivating her in small grow tents (or converted boxes for maximum stealth). After a brief flowering time of 7–8 weeks, you’ll find yourself harvesting, drying, and curing between 550 and 600g/m².

Critical
Afghani x Skunk
550 - 600 gr/m2
80 - 140 cm
7 - 9 weeks
THC: 18%
Sativa 40% Indica 60%
600 - 650 gr/plant
180 - 220 cm
Late September
Heavy, Physically Relaxing, Stoned

Buy Critical

8. Royal Moby

Deriving from parent strains Haze and White Widow, Royal Moby was destined for success from the get-go. Her energetic terpenes and good levels of THC mean you can expect a productive and positive day when blazing this sativa-dominant specimen. If you’ve never gotten on well with wake-and-bake sessions in the past, Royal Moby might just change how you feel about them.

This cultivar expresses itself differently depending on where it's grown, and almost “listens” to the expectation of the grower. Outdoors, she surges to a height of 3m given the space. However, you can limit her to 80cm indoors, making her a great option for stealthy cultivators looking to keep things low-key. After a flowering time of 9–10 weeks, expect a yield of 550–600g/m² and a boatload of fruity terpenes.

Royal Moby
Haze x White Widow
550 - 600 gr/m2
80 - 140 cm
9 - 10 weeks
THC: 21%
Sativa 65% Indica 35%
650 - 700 gr/plant
200 - 300 cm
Late October
Balanced, Clear, Stoned

Buy Royal Moby

9. Shining Silver Haze

What happens when you cross Haze, Skunk, and Northern Light? You get Shining Silver Haze, of course! This sativa-dominant lady descends from greatness, and it shows. Her compact colas offer a THC content of 21% alongside medium quantities of CBD, making the high less intense and more balanced. High levels of terpenes such as limonene add an energetic element to the experience that keeps the head clear and lucid.

But how well does Shining Silver Haze perform within the confines of a grow tent? You can either let her peak at a medium height of 120cm or use a spot of topping and LST to keep her as short as 80cm tall. When it comes to yield, you’ll need enough jars to hold 600–650g/m².

Shining Silver Haze
Haze x (Skunk x Northern Light)
600 - 650 gr/m2
80 - 120 cm
9 - 11 weeks
THC: 21%
Sativa 75% Indica 25%
600 - 650 gr/plant
180 - 220 cm
Late October
Heavy

Buy Shining Silver Haze

10. Skunk XL

Recognised as a classic throughout the cannabis world, Skunk stems from buzzy landrace sativas. Since its creation, the strain has gone on to form the foundation for many other cultivars. Breeders at RQS recognised the brilliance of Skunk, but saw room for improvement in the yield department. By crossing Skunk #1 with Afghan, they successfully created Skunk XL—a more productive variety that thrives indoors.

On top of this, her buds contain a THC content of 17% and medium quantities of CBD, resulting in a high that elevates the mind without overwhelming it. Beginner and veteran tokers alike will get on well with these flowers. In the grow room, growers can keep Skunk XL as small as 60cm, making her suitable for even the most confined spaces. However, she’ll still pump out up to 600–650g/m², making her worthy of her "XL" title.

Skunk XL
Skunk 1 x Afghan
600 - 650 gr/m2
60 - 100 cm
8 - 9 weeks
THC: 17%
Sativa 50% Indica 50%
625 - 675 gr/plant
160 - 200 cm
October
Balanced, Clear, Stoned

Buy Skunk XL

Experience Large Yields Indoors

Successful indoor cannabis grows depend on a range of factors, but choosing the right genetics is crucial. You don’t want varieties that grow out of control, and likewise, putting in all of that effort only to end up with tiny yields sucks. Thankfully, the strains on this list grow to manageable heights without skimping on yields or potency. Try them out during your next indoor grow and see the results for yourself. You won’t be disappointed.

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