best indica strains to grow indoors

Top 5 Cannabis Strains for Indoor Growing

Indoors or outdoors, that is the question. Wondering which set-up to choose and which strains work best in which environment? Fear no more and read all about the benefits of growing cannabis indoors and get to know our top 5 strains for indoor growing.

There are quite a few factors to consider when choosing which strains to grow, especially if your set-up is indoors. You’ll have to compare flowering times, yields, effects and flavours, amongst other things. Growers will often land on their favourite strain after extended trial and error, and it can be an expensive process. We at Royal Queen Seeds, fortunately, have some information that can make the decision a bit easier.

We carry a wide variety of seeds, and each of them has something special to offer. Whether they’re indoor or outdoor strains or whether they’re indica, sativa or a pleasant hybrid, there’s quality across the board. However some varieties perform better than others in an indoor grow. That’s why we’ve decided to put together an updated list of the 5 best cannabis strains for growing indoors. Don’t take this as a full list of the best choices, though. In fact, we strongly encourage you to check out our website, where you can find even more gems.


You may be wondering what the benefits of growing indoors are. Does it have an impact on how the plants grow? Is it better than outdoor growing? The answer to both those questions depends on the strain you select. Some will thrive in the indoor environment, others won’t reach their full potential. Indoor growing in general has quite a few advantages over growing outdoors.

For starters, you can control the climate of your environment. When you have this power in your hands, you can optimize the temperature to match the needs of whatever strain you’re growing, which is a major advantage. Plus, you can keep on cultivating throughout the year since change of seasons will not affect your grow. Keeping with the theme of control, being in charge of the cleanliness of your growing area is a plus, since keeping your product free of germs, parasites, and other harmful intruders is an easier task indoors. Also, an indoor set-up means much more discretion. In short, if you’re living in a rough climate or prioritize cleanliness and privacy, indoor growing is for you.


The short answer to the first question is “Yes.” The slightly longer answer is, “Yes, as long as you can maintain the proper climate, lighting, etc.”

The viability of all strains outdoors is a different story, though. The main reasoning for this is down to plant sensitivity. If you live in a colder climate, many plants you’d normally be able to grow outdoors wouldn’t be able to stand the chill. Beyond climate, there’s the issue of pests. If some bugs happen to find your plants defenceless outside, they’re as good as gone. If you try to get rid of the pests with pesticides, though, the quality of your plants drops harshly.


We like to think of our Critical as the perfect all-rounder and recommend it to outdoor growers, novices, and anyone aiming for extremely high yields in a short flowering period. Indoor growers can profit from a huge production that exceeds indoor yields of 600g/m² in some cases, a strong narcotic stone due to average THC levels of 18%, and a highly stable genetic background consisting of Afghani and Skunk genetics. What makes this strain one of the best choices for an indoor grow? Well, no other variety from the Royal Queen Seeds product range is capable of yielding higher in a short flowering period of 7-8 weeks. If you’re looking for a vigorous and resilient strain that won’t cause any trouble other than confronting you with large amounts of high-quality cannabis – Critical is your choice.

Afghani x Skunk
550 – 600 g/m 2
80 – 140 cm
7 – 8 weeks
THC: 18% (aprox.) / CBD: Low
40% Sativa, 60% Indica
600 – 650 g/per plant (dried)
180 – 220 cm
Late September
Stoned, physically and mentally
Afghani x Skunk
500 – 550 g/m 2
80 – 140 cm
7 – 8 weeks
THC: 18% (aprox.) / CBD: Low
40% Sativa, 60% Indica
500 – 550 g/per plant (dried)
180 – 220 cm
Late September
Stoned, physically and mentally


It was once only available to smokers in the United States. Royal Gorilla has since crossed the pond, allowing for its amazing traits to be enjoyed by the growers and smokers in Europe. A clean split between indica & sativa, Royal Gorilla provides a wave of cerebral relaxation with an impressive 24–27% THC. This is a more complicated blend, combining Sour Dubb, Chem Sis and Chocolate Diesel. Her taste finds roots in the forest, showcasing pungent hits of earthiness and pine and it will grow beautifully away from the great outdoors. Royal Gorilla will take about 9–10 weeks to flower. But once that happens, you’ll see hefty buds with bright green leaves, with so much resin they shine in the light. The plants reach 90–160 cm and bear respectable yields of 500–550g/m². This strain produces superb quality and will definitely not disappoint.

Unsure which strains thrive indoors? Here's a list of some of the best cannabis strains for indoor growing. Click to find out more!

Indica Weed, Top 5 Strains

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  • Escrito por : Ciara
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Indica Weed; Top 5 Strains. Today we’re going to talk about the best indica weed strains when it comes to cannabis; these strains have the purest characteristics of the most indica Cannabis genotypes. In this article we’re going to talk about some of our favorite strains that we’ve grown over the years, how to grow them indoors and outdoors, indica and indica hybrid effects and how to grow them properly.

Indica weed characteristics

One of the main signs that you have an indica plant is wide and short leaves that are an intense dark color and can already be seen once the plants are about a palm’s width off the ground; indica strains are generally recognized due to their leaves and color so you should instantly be able to tell them apart.

Another important sign that you have indica weed plants on your hands is when the branches grow upwards and get stronger in order to put up with the weight of the buds on the tips once the plant begins flowering – if they grew out sideways rather than upwards then they’d snap through the middle due to having buds on the ends of the branches. Some indicas grow wide at the bottom like White Widow or Northern Lights, and you’ll want to train those lower branches so they don’t break once the plant begins to flower; these strains are perfect for growing indoors with a SCRoG method.

Growing indica weed indoors and outdoors

Indica weed is perfect for growing indoors, they grow fast and strong with thick trunks capable of putting up with quite a lot of hefty buds and you’ll be able to fit quite a lot of plants in small spaces thanks to their small stature. Once you flip to the flowering period they get two or three times bigger and most strains finish flowering after around 2 months after flipping the lights. They’re perfect for growing both indoors and outdoors thanks to how compact and sturdy it is.

Thanks to these characteristics, indica strains have been grown indoors for decades. They’re generally quite easy and simple to grow and they don’t usually need any sort of professional care in order to produce efficient results.

These plants are used to produce resin that can then be used to make hash, it simply comes natural to them. You’ll end up with some plants that are covered in resin, even on the leaves and the stems of the plant. You’ll be able to get an amazing extraction from the leaves and the stems, and if you were to use the buds you’d get absolutely amazing percentages.

Another important aspect of indicas is that outdoors they’re also quite quick to flower, generally finished around the beginning of September, making it the perfect strain for areas in which the end of summer rains arrive early. If rain manages to get to our plants then they’ll most likely get some fungi, but if you live somewhere where it doesn’t rain too much all you’ll have to do is use an anti-fungi preventive.

Indica weed yield and effects

Indica weed strains have always been known for producing amazing amounts of flowers and having an incredible resin capacity; these strains have been used for years in order to make enormous quantities of quality hash. One of the main factors that made sure indica was one of the most grown types of cannabis is the fact that it glowers much earlier and faster, offering impressively large yields when given the best possible diet.

Practically all indicas have relaxing, pain-relieving, calming, anti-inflammatory, appetite-increasing effects among many, many others. This is due to the high amounts of THC and CBD that these plants contain. Thanks to producing higher amounts of CBD than sativa strains, it gives a much more complete and less psychoactive-effect. There are many people that have illnesses and need to take pills to sleep or to reduce pain; smoking a joint, vaporizing some extracts or making your own medicinal tinctures can be just as effective as the medications, even more so as it doesn’t come with any nasty side effects other than the munchies and relaxation. Keep in mind that certain terpenes also directly affect the effect that cannabis plants produce.

Our TOP 5 Indica Weed Strains

We’re going to give you a little list of our favorite Indica strains that we’ve grown and tried over the years; those that have a good structure, a decent yield, a nice relaxing effect and those with amazing flavors.

Critical +

This strain has everything, which is why it’s one of the preferred strains for indoor grows, especially for commercial growers. Even though it’s not 100% indica it has some clear and recognizable effects regardless of its Sativa percentage. This strain grows quite quickly with a strong and resistant trunk in order to hold up the amazing central cola that grows at the top. This strain eats well, and likes frequent fertilizers although be careful not to overdo it. The branches grow out long and practically stuck to the trunk, and when it flowers it practically only grows buds on the top of the central stem and the stop of the branches. It has an amazing fattening period – once the flowering period is over the central stem has a bud the size of a coke can and double the length and the buds on the branches are the size of chicken eggs. It will produce an amazing amount of resin everywhere from the pistils on the buds to the biggest leaves, so you’ll have more than enough to make top quality extracts and tinctures. Indoors, this strain only takes two months to flower from flipping the lights, and if you plant it outdoors you can harvest around the beginning of September. You can get up to 500g out of a meter square grow using a 600w grow light. One outdoor plant can give the same yield, 500g, per season. It has a strong citrus like flavor, satisfying the most demanding of smokers with its relaxing effect from start to finish. This strain is perfect for those that suffer from insomnia or muscle pain thanks to its capacity to grant relief.

Channel +

This is another of our favorites and one of the quickest flowering strains out of all of the seasonal indicas we’ve tried. When you plant Channel + the first thing you need to know is that you’ll be getting your harvest rather quickly this time around. It grows fast and strong; it’s a very compact plant and it has colas everywhere on its small 60cm structure, reaching up to 14 branches. It can easily put up with the weight of the buds that it grows, so although it may have many branches don’t bother training it too much; a stake in the middle will be more than enough. Indoors is where this strain shows the most of its rapid flowering, as it takes just 60 days after flipping the lights to be completely finished and ready to harvest. This might seem just as fast as other strains, but other strains are finished 60 days after the plants begin flowering rather than after the light flip. It has quite a high yield, getting around 500g with 9 plants in a square meter. When planted outdoors is when you’ll really appreciate how big this strain can grow, as you can get up to 1kg from just one seasonal strain towards the beginning of September. This strain is a highly valued medicinal plant as it has quite a high CBD content, which takes away from THC’s psychoactive effect and leaves you with a nice medicinal, narcotic and relaxing effect.

Northern Lights X

This is one of the most productive indica weed strains, meaning that it’ll take a little longer than the others. This plant’s strong point is along the central stem and its large quantity of branches that grow long and heavy colas, making it perfect for indoor growing. When planted under grow lights this is a strain that is going to need a SoG or SCRoG system to get the most yield possible in the smallest space available, easily getting over 500g per square meter. It should take about 70 days to flower. Outdoors this strain is an absolute monster, giving almost a kilo per plant, although you’ll need to take some care when it comes to picking the location; this plant will be ready around the start of October, so you’ll need to protect it from the rain which could seriously damage those thick and dense buds. If you live somewhere cold or where it rains a lot then you’ll need to take some preventive measures and use fungicides to make sure you don’t get any nasty surprises when it comes time to harvest. Indoors this plant will give the most of its flavor, a nice earthy taste that completely fills your lungs when you smoke. It has a potent relaxing sensation, perfect for relaxing both body and mind; before you can realize you’ll be hypnotized by the effects. It grows quite tall and wide, so it’s perfect for cloning indoors and outdoors you should leave it as it is and you’ll be rewarded. Once it begins flowering the branches will open out a bit, allowing the light to reach all of the flowers making for even longer colas of top quality bud that’s hard to find on an Indica strain. Another amazing quality is that it’s full of resin absolutely everywhere, so you’ll be able to get some amazing extracts from this strain, whether its hash or BHO or tinctures.

California Indica

This strain was originally Sativa and was forced genetically into an Indica weed strain; California Orange is one of the most sought-after strains due to its yield and flavor, but it takes much too long to flower so it was crossed with a selection of males until the perfect hybrid was found. Apart from increasing resin levels by 200%, this also made the flowering period much shorter. This strain is perfect for any outdoor grow which is where you’ll get the most of it in as far as yield, getting up to 1.5kg from just one seasonal plant that takes around 6-7 months to grow under a strong sun and with plenty of timed fertilizers. When grown indoors this plant might grow a bit too tall so you’ll need to keep the size under control by using a SCRoG mesh or a properly timed pruning. Indoors is where you’ll get the best quality from this strain in both flavor and aroma – it should be ready about 60 days after beginning to flower. Outdoors this strain should be ready around mid-September, which is quite fast and ideal for humid areas that tend to get end of summer rains – this strain is available in regular and feminized versions, although the regular version gives more of a yield; to get the regular seeds to come out female you’ll need to germinate quite a lot of seeds with high humidity and keep an eye on your grow once the pre-flowers begin to show. You can germinate in a greenhouse or propagator which will give you a higher chance of getting female seeds, as long as they get a lot of humidity. You’ll be able to get ridiculously high bud yields. It has a citrus-like flavor, similar to lemon or sour oranges, making for quite a marked flavor that you’ll never get tired of smoking. This strain’s ideal for smoking with friends, giving a nice relaxing effect that isn’t too aggressive, although if you pack your bowl a bit too much you could see yourself snoring in bed within the hour.

Black Domina

This delicious 95% indica weed strain might as well be pure, because it grows, flowers and tastes just like any amazing pure indica strain. It has been grown for years now by those that love earthy, sweet flavors and delicious relaxing effects. This beautiful strain comes from the breeders at Sensi Seeds, known for their legendary strains such as Skunk, Jack Herer, Shiva Shanti and Durban, as well as many more classic strains. This plant comes from a cross between four different incredibly prestigious indica strains; Northern Lights, Ortega, hash Plant an a special afghan plant called SA. When grown indoors you’ll soon see how easy it is to grow and how well it behaves. Its main stem is generally the most productive part of the plant, so we recommend placing around 16 plants per square meter in order to get the largest possible yields from its main stem – up to 450g, even in the hands of a beginner. It goes beautifully dark green colors and produces lots of resin; its buds almost look like their covered in a thick layer of sugar. Its effect is super relaxing and can be quite narcotic, so it’s perfect for smoking after a long hard day at work. Its flavor is deliciously sweet and musky with a sort of earthy aftertaste with incensed hints; the perfect combination.

Whichever strain you decide to pick, we’re positive that you’ll be happy with the results as these are our personal favorites and have been for years, and we have tried many, many different strains. We chose these strains for their yield, flavor, effects, short flowering, and some of the best Indica weed characteristics around. If you have any strains that you’d like us to talk about, any suggestions tips or questions, don’t hesitate to leave a comment below and our team of experts will get back to you as soon as possible. Happy growing!

Author: Javier Chinesta
Translation: Ciara Murphy

The best indica weed strains; a selection of our favorite indica strains to grow, tried and tested by our team of experts here at