Indoor Cannabis Seeds


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Cultivation of cannabis with indoor seeds gives a grower control over the crop. You can micromanage every step of the plant's life cycle. Choosing which indoor cannabis seeds to opt for can be complicated. Seedsman has the largest selection of indoor cannabis seeds available online. Our indoor cannabis seeds are among the best in the business. With decades of experience, you can expect the best quality results and an easy grow.

Indoor Seeds

Cultivation of cannabis with indoor seeds gives a grower control over the crop. You can micromanage every step of the plant’s life cycle. An indoor setting allows you to control the plants’ feeding, lighting schedule, temperature, humidity, and other crucial factors for your indoor seeds’ optimum growth. Suppose you want to plant indoor seeds, this guide offers you all the information about growing marijuana indoors. We also provide a list of the best indoor seeds for indoor growth.

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Indoor Seeds

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Table of content

What Are Indoor Cannabis Seeds?

Although all cannabis strains can be cultivated in an indoor setting, some seeds are specifically meant to be cultivated in an indoor environment. Indoor cannabis seeds are sensitive to change in the climate and prefer to be in a controlled room.

Why Should You Grow Indoor Marijuana Seeds?

If you are starting, you may ask yourself, what are the benefits of growing indoor seeds? And how indoor cultivation impacts your plants? Are they better than outdoor seeds? Are they the highest THC seeds in the market? Your response to these questions depends on the indoor strain you choose to cultivate. Indoor seeds have a few advantages over outdoor seeds. Below, we explore the benefits and cons of using indoor seeds.

Pros of Indoor Seeds

    Control Over the Environment
    The good thing about growing indoor seeds is the ability to control their growth conditions, such as temperature, humidity, water, nutrients, lighting, and airflow. It allows you that your plants grow under optimal conditions, which translates to better and higher yields.

Cons of Indoor Seeds

    Tiring, Time-Consuming, and Expensive
    Setting the grow room is a lot of work and requires a substantial investment because you need to purchase the grow kit, form the tents, lights, pots, air conditioning system, and grow medium. You may also need to hire professionals because doing a DIY setup may lead to some setbacks, affecting yields and quality of your indoor marijuana.

Tools and Equipment Used in Growing Indoor Cannabis Seeds

Suppose you want to grow indoor marijuana from the indoor seeds, you will need:

  • Grow room/grow tent
  • Growing lights
  • Air conditioning
  • Fans
  • Filters
  • Thermometer and hygrometer
  • pH test kits for test soil pH
  • LUX Meter for measuring and optimizing light in the grow room
  • Timer for automating light cycle
  • String/gardening wire for training your plants
  • Containers such as fabric pots for growing your plants
  • Seedling starter kit

Best Places for Growing Indoor Seeds

Now that you have all the equipment needed to grow your weed seed indoors, you need to choose the best place to grow your indoor cannabis seeds. These places include:

  • The basement
  • Garage
  • Attic
  • Grow box
  • Closet, or
  • Build a grow room

Choosing a Growing Medium for Indoor Seeds

When growing indoor marijuana seeds, you can use either soil or hydroponics as the growing medium. Soil is the most straightforward growing medium used by most cannabis growers, especially beginners. You can either buy the soil mix or create your own.

Hydroponic uses water or another soilless substrate, such as coco coir or pear as the growing medium. In this method, plants are fed with nutrients directly into the roots, giving the total grower control over the nutrient intake. This method is ideal for experienced growers and leads to improved yields.

Choosing Indoor Seeds

There are many weed seeds for indoor growing for sale, therefore, growers need to select quality indoor weed seeds. Discussed below are the 10 best marijuana seeds for indoor growing:

Sour Diesel

Sour Diesel is a well-known strain from the Diesel family that is highly potent. It is a cross between Chemdawg and Super Skunk. This strain is not recommended for beginner growers and prefers dry and warm climates. However, know how to control powdery mildew since Sour Diesel is susceptible. Therefore, it is recommended that you cultivate this cannabis strain indoors.

Sour Diesel indoor marijuana seeds grow into tall plants that can be monstrous if not trained. The strain’s flowering time lasts from 9 to 10 weeks, with 1.5 – 1.6 oz/ft² (450 – 500 g/m²) yield when it is grown indoor.

See also  Cannabis Seed Bank
Hellfire OG

Hellfire OG is a perfectly balanced hybrid strain that gives a couch locking high. This strain was created by mixing Rascal’s OG Kush and SFV OG Kush. Hellfire OG boasts a THC content of 28 to 30% and has potent euphoric effects. Hellfire OG indoor weed seeds grow up to 7 feet (2 meters) high with compact and dense buds. Hellfire OG flowering time lasts 55 – 65 days with high yields of 1.3 – 1.6 oz/ft² (400 – 500 g/m²).

Granddaddy Purple

Granddaddy Purple is a beautiful purple colored strain that is a cross between Big Bud and Purple Uncle. These are top-shelf seeds that are highly sought after by both novice and veteran growers. Granddaddy Purple seeds give perfect weed plants for growing indoors because their height reaches up to 3.5 feet (100 cm) with a flowering time of 9 – 10 weeks. The strain’s buds are thick and dense with a layer of rich THC (15 – 19 %) trichomes. You can expect to reap high indoor yields of 1.3 – 1.6 oz/ft² (400 – 500 g/m²).

Chocolate Thai

Chocolate Thai is a 100% Sativa strain from Dutch Flowers. Like its name, the strain was first discovered in Thailand. This cannabis strain delivers an energizing, mind-clearing high. Though it has a low THC content of 10 to 15 %, users love this strain because of its creamy chocolate taste and delicious high that does not leave you couch-locked.

Chocolate Thai is a pretty tricky indoor weed seed to cultivate, and they are best left for expert growers who have the patience of waiting out their long flowering period and low yield. Suppose you are in a cold climate, it’s best to cultivate this weed seed indoors because it thrives in a warm and dry environment.

Wedding Cake

Wedding Cake indoor cannabis seeds are Indica dominant. The seeds grow into a short and sturdy plant that thrives in various environmental conditions. These are high THC seeds with a THC content of 17 – 23 % and delivers a long-lasting and cheerful high. Wedding Cake strain flowering period lasts for around 65 days and produces decent yields of about 1.5 – 1.6 oz/ft² (450 – 500 g/m²). This strain is moderate to cultivate but is naturally resistant to various diseases and pests.

Blue Dream

Blue Dream is a Sativa dominant strain that is highly sought after in America. This strain packs quite a punch as its THC content ranges between 16 and 20%, with 2% CBD. Growing Blue Dream indoor marijuana seeds requires patience because it grows slowly as it needs time to branch out in its early stages. The plants are tall and can hit 6 feet (180 cm) with high and healthy yields. Blue Dream is a favorite of mites, pests, mold and mildew; therefore, growing it indoor helps control humidity, facilitating the infestation.

Purple Kush Autoflower

Purple Kush Autoflower is a popular cannabis strain among cannabis lovers who love smoking this strain because of its potent high. It is got by crossing Hindu Kush and Purple Afghani.

It is straightforward to grow Purple Kush Autoflower weed seed indoors because it grows into hardy, medium-sized plants. This beautiful strain improves your garden aesthetics with its purple hues and unique aroma. Purple Kush flowering period lasts 56 – 63 days with a pretty decent yield of 1 oz/ft² (300 g/m²) when it is grown indoor.

Strawberry Cough

Strawberry Cough is a hybrid strain whose origin is marred by a lot of myths. Just like its name, expect your field to smell like strawberries. This Sativa dominant strain is pretty easy to cultivate and thrives in an indoor environment.

When you plant Strawberry Cough weed seeds indoors, the plants grow up to 3 feet (90 cm) and mature in 63 – 70 days. Strawberry Cough has sturdy branches to support the weight of the tight bud with a pine cone shape.

Legend OG

Legend OG is an Indica dominant strain with a woody and floral aroma. Although this strain does not have a well-documented origin, Legend OG was created by Swamp Boys Seeds. This is a high THC strain with THC ranging between 20 to 25%. It grows tall and is ideal for average growers and produces moderate yields.

Cement Shoes

If you want to cultivate potent indoor marijuana seeds, Cement Shoes is our best bet. Apart from a high THC content of 20 – 24 % and 1% CBD, this strain offers you a relaxed cerebral buzz and a heavy-bodied buzz that leaves you couch-locked. A three-way cross gets this strain between OG Kush, Animal Cookies 09, and Wet Dreams.

When you cultivate Cement Shoes weed seeds indoors, you get a 5 feet (150 cm) tall plant with a flowering period that lasts between 60 – 70 days. This Indica dominant strain produces high indoor yields of 1.3 to 1.6 oz/ft² (400 to 500 g/m²).

See also  Hybrid Weed Seeds

Indoor Seeds vs Outdoor Seeds, Which Is the Best?

Suppose you are new to marijuana and are wondering where to grow your indoor weed seeds. The seeds you choose to go with depends on your potential, the type of conditions it requires to thrive, and weather in your region. It is best to grow marijuana indoors because you can control your cannabis plant growth conditions. But with outdoor seeds, you have little to no control in case the weather changes.

Final Thoughts on Indoor Seeds

Indoor seeds are best when you live in a region where the weather often fluctuates, making it difficult for cannabis to thrive in an outdoor setting. If you are shopping for the indoor cannabis seed, look no further because we have a large selection of Indica and Sativa indoor seeds and this guide provides you with a list of the best marijuana seeds for growing indoors.

Cannabis seeds are sold to customers over the age of 21 and are sold strictly for souvenirs or storage purposes only. The cultivation and germination of cannabis seeds is illegal in most countries. We advise customers to check the laws in their country before ordering.

Best Indoor Seeds

In legal territories, cultivating cannabis indoors is popular due to better control of the elements. Controlling the light, humidity and temperature can incur excellent results. However, choosing which indoor seeds to opt for can be complicated with the abundant indoor seeds available on the market. Most growers base their decision upon factors including but not limited to flowering time, yields per m², effects, and tastes.

Use our handy filter on the left-hand side to source the best indoor cannabis seeds for sale online, tailored precisely to your needs.

Indoor Seeds

Indoor cannabis seeds remain one of the most popular ways to grow high quality, high potency cannabis. Growing indoors, with a fully controlled and optimised environment, allows the indoor cannabis seeds to reach full potential. Expect the highest THC levels and heavy harvests along with superb aroma and flavour. Our indoor cannabis seed collection contains some of the most popular feminised seeds and autoflower seeds.

Active filters

Auto Orange Bud®

Orange Bud X Auto Daiquiri Lime

Auto Lemon Kix®

Las Vegas Lemon Skunk Autoflower

Auto Blackberry Kush®

Blueberry X Dark hash-plant

Passion Fruit®

Sweet Pink Grapefruit X Orange Bud

Orange Bud®

Original Orange Bud

Strawberry Cough®

Original Strawberry Cough

CBD Auto Blackberry Kush®

CBD Charlotte’s Angel X Auto Blackberry Kush

Auto Mokum’s Tulip®

Mokum’s Tulip x Auto Colorado Cookies

Skywalker Haze®

Original Skywalker x Amsterdam Amnesia

Auto Skywalker Haze®

Skywalker Haze x Auto Amsterdam Amnesia

Amsterdam Amnesia®

Amsterdam Amnesia


Wedding Cake X Animal Cookies

Sugar Bomb Punch®

THC Bomb X (Critical Orange Punch x Bubba Island Kush)

Power Plant®

Original South African Power Plant

Auto Cinderella Jack®

(Cinderella 99 X Jack Herer) X Magnum

Auto Think Different

AK420 Autoflower

Trial Pack Autoflower

Trial Pack Autoflower

Trial Pack Feminised

Trial Pack Feminised

What are indoor cannabis seeds?

Indoor cannabis seeds can be germinated and grown into plants which produce cannabis buds. Good quality indoor cannabis seeds are easier to grow than ever and deliver heavy harvests rich in THC, or any other cannabinoid you prefer such as CBD, CBG, CBDV, THCV etc. Most growers choose either autoflowering cannabis seeds or traditional photoperiod seeds. But some old school growers (or those wanting to produce their own crosses) can also grow regular photoperiod cannabis seeds.

Buy indoor cannabis seeds online

Autoflower seeds take around 10-11 weeks to grow indoors. Usually they are grown under 20 hours of daily light from seed to harvest. Quality levels from the best autoflower seeds are as good as photoperiod feminised seeds and many growers feel that autoflower seeds are easier/faster to grow.

Photo-dependent feminised seeds don’t start blooming until light hours are reduced to 12 per day. Whether you choose autoflower indoor seeds or photoperiod indoor cannabis seeds you can expect high quality harvests.

Best indoor feminised cannabis seeds

There has never been such a wide choice of indoor feminised cannabis seeds. Recent introductions with USA genetics have increased the diversity and quality levels on offer. Here are three of the top Dutch Passion feminised cannabis seeds.

Sugar Bomb Punch

Sugar Bomb Punch seeds are a proud member of the elite Dutch Passion Extremely High THC cannabis seeds collection. These can produce THC levels around 25% in optimum conditions. Indoor feminised cannabis seeds simply don’t come much stronger than Sugar Bomb Punch! The indica genetics take around 9 weeks to complete bloom and are part of the USA Special cannabis seed collection.

Amsterdam Amnesia

Amsterdam Amnesia seeds use the best Amnesia genetics you can get, Amsterdam Amnesia! With very high THC levels and the classic Amnesia effects this is a strain that should be in everyone’s seed collection. With famously high yields of frosty and mind-numbingly potent sativa buds Amsterdam Amnesia is a classic indoor feminised cannabis seed that you simply shouldn’t miss out on!

See also  Weed Seed Express Coupon

Skywalker Haze

If you’re looking for a sativa strain with very high THC levels, a bloom time of around 9 weeks and a classic soaring Haze high with powerful cerebral effects then look no further. Skywalker Haze feminised cannabis seeds are exactly what you are looking for!

Best indoor autoflower cannabis seeds

Autoflowering cannabis seeds have become the go-to genetics for any grower seeking a fast, heavy, high quality harvest with an easy grow experience. Dutch Passion are proud to have been one of the original autoflower seed pioneers and have collected numerous cannabis cups and awards for their autoflower seeds. Here are 3 top recommendations:

Auto Skywalker Haze

Fans of sativa indoor autoflower cannabis seeds will love Auto Skywalker Haze. With very high THC levels autoflower seeds don’t get much stronger. The Haze genetics mean that Auto Skywalker Haze can take up to 12 weeks from seed to harvest. That’s a couple of weeks longer than other autos, but the wait is worth it for the XL yields of powerfully relaxing buds.

Auto Cinderella Jack

If you’re looking for the strongest possible indoor autoflower cannabis seeds then you need Auto Cinderella Jack. With THC levels officially (and independently!) recorded at over 25% this could be the worlds strongest autoflower seed. Heavy yielding with a long lasting and supremely powerful effect. Only suitable for those that can take the very strongest buds!

Auto Lemon Kix

Auto Lemon Kix has to be one of the most delicious tasting strains from recent years, with a sweet candied fruit aroma and an equally mouthwatering taste. These indoor autoflower cannabis seeds are a member of the exclusive Extremely High THC cannabis seed selection.

Best indoor regular cannabis seeds

Indoor regular cannabis seeds give rise to approximately equal numbers of male and female offspring. Regular cannabis seeds can be used to produce your own hybrids/crosses from male and female plants.


Mazar is a legendary original member of the Dutch Passion Afghani Kush seed collection. With a powerful indica effect and dense, sticky THC loaded buds it remains a favourite with growers around the world many years after she was first released. Also available in feminised seeds and autoflower seeds.


Blueberry seeds need no introduction. A multiple cannabis cup winner and legendary founding member of the Blue Family of cannabis seeds. Blueberry seeds produce plants with very high THC levels and a uniquely smooth and relaxing connoisseur high. Some people grow nothing else! Also available in autoflowering seeds and feminised cannabis seeds.

Orange Bud

Orange Bud is a sativa variety which can be ready after just 7-8 weeks of bloom. The buds have a refreshing taste of freshly picked oranges and a strong citrus aroma. This delicious package is completed with a famously powerful and enjoyable high. Due to customer demand, Orange Bud is also available in autoflower seeds and feminised seeds.

What makes a cannabis strain indoor or outdoor?

Some indoor cannabis strains can’t be grown outdoors at all latitudes. They may lack the genetics to give them sufficient weather resistance at your latitude. Or they may simply take too long to finish outdoors in temperate climates.

Dutch outdoor cannabis strains have been selectively bred over many generations to withstand outdoor cultivation at Dutch latitudes.

When to start indoor cannabis seeds?

It’s up to you! The beauty of indoor cannabis seeds is that you create the optimised grow environment indoors. So long as good indoor grow conditions are maintained you can grow your indoor cannabis seeds at any time of the year, or even all year round!

What do you need for indoor cannabis seeds growing?

You need grow lights, a carbon filter, extraction fans, a grow medium/grow system, nutrients and a few other devices perhaps (thermometer, humidity meter, pH meter). You can buy the equipment easily online or in a grow shop. You will also need some quality cannabis seeds from a proven supplier!

What is the average flowering time of indoor cannabis strains?

Typically around 8-10 weeks bloom time for indoor feminised cannabis seeds, though some Haze strains can take up to 14 weeks. Autoflower seeds grow from seed to harvest in around 10-11 weeks.

What is the average yield of indoor cannabis seeds?

There are so many factors that it’s hard to give an average yield. Light type, grow method, skill level, cannabis genetics all have a huge impact. Many growers aim for around 75g-100g per indoor plant. But inexperienced growers may get less, and professional growers could get much more.

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