The Best Cannabis Seeds for Indoor Growing

Growing cannabis indoors is convenient and effective. It allows for a degree of intervention and control that is hard to reach outdoors. If you are looking for some strains to try out indoors, we have a list of some favourites for you.

Growing cannabis indoors is a great way to keep ultimate control over your crop. Everything can be micro-managed, from feeding to the intensity of light, to the much more advanced aspects of a grow.

Nowadays, strains vary in terms of flavor, potency, and even color. But if you are one of those who intend to grow their own product, it is essential to consider the other external factors that can influence how well a plant grows. These include the humidity in the environment, as well as flowering time, and whether they are best cultivated indoors or outdoors. It is also important to look at other elements such as how the bud handles cold weather or a drought, possible formulation of mold, and insect infestations.

There also are strains that are better suited to beginners than others. Autoflowering strains, for example, have a quicker budding process can go from seed to harvest in as little as 8 weeks. This combined with the natural resilience of the ruderalis genetics they contain make them well suited to people looking to try out a grow for the first time, as well as those who are particularly impatient.

Growing cannabis indoors is the best way to ensure a completely stable cultivation environment, where each element (light, heat, air, nutrition, and water) is determined by the grower. At absolutely no time in the growing process are indoor gardeners dependent on outside weather and climate conditions.

Choosing cannabis strains for an indoor grow can sometimes be a time-consuming process that requires a lot of research in order to weigh off between different features like flowering time, yields per m², effects, and flavours. Most growers will also base their decision on the personal experience they made with certain varieties over the years. However, there’s a point in the life of every grower when the decision to choose a certain strain over another is tough, and the extensive product range of Zenpype seeds doesn’t necessarily make such decisions easier.

There are cannabis seeds out there that can thrive indoors, producing high yields of potent bud. You not only get to grow them in the comfort of your own home, you also get to enjoy the bountiful amount that will be rendered from it. Here are some strains that offer just that: high yields that are great for growing indoors.


Gelato is a hybrid crossed from taste-engineered parents Thin Mint Girl Scout Cookies and fruity indica Sunset Sherbert. With a balanced, mellow high and a universally appealing flavor profile, this is a great strain for social use. Our Gelato Samba has an intense aroma of topical fruit, citrus and spice. This strain has an indica-leaning high and carries a THC composition that ranges from 20% to 25%. You’ll want to train and prune the plants regularly when growing this lady. Along with that, you should bring techniques like the ScrOG, fimming, mainlining, LST & topping into play. 

Hindu Kush

Hindu Kush is an indica strain, which means its growth is short, dense, and bushy. This can be taken advantage of when growing indoors in small spaces. Hydroponically, Hindu Kush takes off and produces large resinous buds. SOG (sea of green) is recommended for maximum yields. Keep the airflow strong in the garden to help reduce humidity in the dense canopy.

Hindu Kush likes a dry climate with low humidity. It can handle cold temperatures well but suffers with moisture. Ideally, keep this strain between 65 and 80 degrees Fahrenheit.

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This is a well-balanced indica dominant hybrid that based on the crossing between Afghani and Skunk. It contains 30% sativa and 70% indica genetics. The plant develops an indica structure with a short internodal distance and grows up to 1m tall. Such height makes it good choice for small spaces. Critical mass will grow to its full potential indoors.

Critical Mass has become the new mass production plant for growers who demand a very high yield of potent cannabis.

Grows thick chunky colas that may need to be staked up due to their heavy weight. Critical Mass is a stout commercial strain for the indoor cash crop grower. Not very mold resistant, better to grow indoors.

One of the heaviest yielding strains on the market with a super fast flowering time. The buds of Critical Mass smell of skunk and lemon, with a slight sour undertone. The effect is strong in the body, thought provoking. Easy to grow, easy to clone strain. Critical Mass is a knockout stone, couch-lock bud.

Jack Herer

Jack Herer is a sativa-dominant cannabis strain that has gained as much renown as its namesake, the marijuana activist and author of The Emperor Wears No Clothes. Jack Herer will continue to increase its height during the flowering period and the lateral branches will form a candelabra-like shape around the main stem. As the huge, spiralling colas develop, some extra support may be needed to prevent thinner branches splitting under their weight. This spicy, pine-scented strain has taken home numerous awards for its quality and potency. Many breeders have attempted to cultivate this staple strain themselves in sunny or Mediterranean climates, and indoor growers should wait 50 to 70 days for Jack Herer to flower.

Amnesia Haze

Amnesia Haze is another classic strain and couldn’t be missing in out top 5 best best indoor cannabis strains. The strain is worldwide known because of its very high THC level. Thanks to its properties Amnesia Haze is very suitable for indoor cultivation. The only “drawback” we can think of is the relatively long flowering time of 10 to 12 weeks. However, every disadvantage has its advantage. Due to the long flowering period the weed is extremely strong, the yields can reach 650 grams per m2 and both the taste and the smell are sublime.

The strain is medium sized for sativa plant. It grows up to 120 cm indoors and to 2.1 m outdoors. The plant is very sensitive and loves sun. So it needs extra care during outdoor cultivation. Amnesia Haze may invite pests and infection when grown outdoors. Amnesia Haze suits for both hydro and soil grows, and also fo SOG and SCROG.

Bigger Bud

Bigger Bud has been around for a long time. A popular story on its origin is that it started in the 80s, during the administration of Nixon. Before the crackdown on cannabis, as part of the US war on drugs, it found its way to Netherlands. There, the strain was stabilized genetically, rather than being exterminated and wiped out of existence.

The strain suits for indoors, greenhouses and outdoors in a warm, sunny climate. The harvest comes after 8-10 flowering weeks and brings a large yield of heavy compact buds. The plant is a great resin producer. It is a great choice for SOG. The result plant demonstrates a reliable, super-productive variety with amazing aroma of a spice and sweet fruits. The high THC content provides a potent long-lasting effect.

Despite the massive flowers, it does have thick stalks that are able to hold the weight. Even so, growers should be mindful and be ready to provide support using tensioned wires or strings. While it is fairly easy to grow, this plant needs early topping and bending, which allows a more horizontal growth.

Northern Light

Northern Lights is a strain that is known for being seriously easy to grow. It is a relatively small to average growing plant, with distinctive amount of resinous buds. This strain can be grown indoors and also outdoors.

This indica dominant strain is a popular choice among beginner growers – and it is one of the legends of the cannabis world. It is essentially a mid-sized plant that can grow up to 1.6m when cultivated indoors and can be available for harvest after just 8 weeks of flowering. The roots of its species are traced back to Afghanistan and Thailand and are reputed to have a powerful, long-lasting buzz. She is a multi-award winner, adored by novices, veterans and connoisseurs alike.

This strain reportedly takes an average of 7 to 9 weeks to flower, although there are times when it is ready for harvest after only 7 weeks. Northern Lights can yield an average of 18 ounces per square meter in a healthy indoor environment.

Perfect Power Plant

Perfect Power Plant. You won’t see Perfect Power Plant listed in the top list.

However, in our opinion Perfect Power Plant is one of the best indoor cannabis varieties and undervalued as an indoor plant. Perfect Power Plant is another classic that still brings quality high yields on well bulked-up plants. Perfect Power Plant, or Power Plant, forms large, heavy dominant colas on an easy-growing sativa strain.

The strain has all the characteristics that an indoor grower needs. A relatively short flowering time of 8 – 9 weeks, a high mold resistance, easy to grow, a short plant height and yields up to 550 grams per m2. In short: what do you want more?


The AK seeds are one of our favorite classic strains and belongs to one of the best indoor cannabis seeds. Thanks to the genetics (Colombian x Mexican x Thai x Afghani) the AK is known for its extremely high mold resistance and high yields wich can reach up to 600 grams per m2. A very stable strain and easy to grow. With the AK, a harvest failure is almost impossible. Why choose AK for an indoor grow? It offers a high calyx to leaf ratio, solid side branches to maximize yields using LST methods, and fruity Sativa flavours with hints of pine and petroleum.

These are just some of the strains you can choose from if you opt to grow your buds indoors. And with the high yields that each of them brings, you can be assured to get a bang for your buck.

[Updated, originally published 3.8. 2017]

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