Marijuana (Cannabis)

Marijuana Seed Strains


Cannabis is the name of a genus of plants made up of three species. Cannabis plants are often grown for their fiber, as well as other commercial purposes, or for their THC content.

When grown for fiber, or other non-THC purposes cannabis plants are commonly called hemp plants. When grown for their THC content, cannabis plants are commonly called marijuana plants.

The term marijuana strain is used to indicate a group of cannabis plants that have developed characteristics that make them different, when compared to other cannabis plants. This way a name can be given to differentiate between cannabis plants grown for their THC content.

Choosing A Strain
Example Strains
Further Details
Cannabis indica
Cannabis sativa
Cannabis ruderalis


Choosing The Best Marijuana Seed Strain

The strain you choose will have the most impact on the potency and qualities that the marijuana you produce processes. For both medical and recreational growers, marijuana with a high THC content is the primary goal.

There is no one single seed strain that is the best for everyone. If you grow indoors the best strain for you might not be best for every marijuana grower. For example, an outdoor grower might choose differently.

Things to consider when choosing the best cannabis strain for your needs include: is it an indoor or outdoor variety, is it relatively easy to grow, what is the expected flowering time, how potent the marijuana it produces is.

If obtaining seeds is expensive for a first time grower or someone with limited experience, consider an inexpensive strain if there is any doubt in your mind about raising a crop successfully.

This doesn't mean choosing an inappropriate strain, like an outdoor strain if you are growing indoors. It means choosing the least expensive strain that meets the requirements for your needs.

Different types of seeds are available. With regular seeds about 50% of seeds will be female. With feminized seeds a majority of the seeds will be female. Auto-flowering seed strains will flower automatically, no need to change length of day.


Examples Of Some Popular Marijuana Strains

The examples below are some of the more commonly known marijuana strains that you may have heard of. A more complete list of seeds that are currently available for indoor and outdoor growers can be found here.

A) --- Afghani #1 is a nearly pure indica strain. It produces a large crop of fairly potent marijuana. This is a fairly easy to grow plant and is worthy consideration for a first time grower.

It is a recommended indoor marijuana seed strain. It is recommended for growing outdoors in warmer areas, but not in cold climates. Flowering time indoors is about 6-8 weeks, 42-56 days.

B) --- Big Bud is a mainly indica strain. It produces a very large harvest in comparison to other strains grow under the same conditions. The potency is not very high, but will be satisfactory for most casual smokers.

It is a recommended indoor marijuana seed strain. It is recommended for growing outdoors in warmer areas, but not in cold climates. Flowering time indoors is about 7-9 weeks, 49-63 days.

C) --- Northern Lights is a nearly pure indica strain.. It produces a large harvest of moderately potent marijuana. This is a fairly easy to grow strain and might be a worthy consideration for a first time grower.

It is a recommended indoor marijuana seed strain. It is recommended for growing outdoors in warmer areas, but not in cold climates. Flowering time indoors is about 6-7 weeks, 42-49 days.

D) --- Silver Haze is mainly sativa strain. It produces an average size harvest of very potent marijuana. This is a fairly hard to grow strain and should only be attempted by experienced growers.

It can be grown indoors by experienced growers only. It is recommended for growing outdoors in warm sunny climates, preferably close to the equator. Flowering time indoors is about 9-11 weeks, 63-77 days.

E) --- Skunk #1 is a mainly indica strain. It is noted for its strong smell, hence the name skunk. It produces a fairly large potent crop of marijuana. More for the grower with a bit of experience, as opposed to a novice.

It is a recommended indoor marijuana seed strain. It is recommended for growing outdoors in many, including colder, climates. Flowering time indoors is about 6-8 weeks, 42-56 days.

F) --- White Widow is a mainly indica strain. It is known for producing a large harvest of potent marijuana. Grown indoors it can get fairly tall and might be best for a grower who has some experience at raising a crop successfully, rather than the first time grower.

It is a recommended indoor marijuana seed strain. It is recommended for growing outdoors in warmer areas, but not in cold climates. Flowering time indoors is about 7-9 weeks, 49-63 days.


Indoor Marijuana Strains For Beginners

As a general rule, first time indoor growers or those with limited experience, growing either with hydroponics or soil, should choose an indoor seed strain that is easy to grow, potent, produces a large yield.

These marijuana strains can be considered. They are relatively inexpensive, easier to grow, stay short, produce a large harvest, have a short flowering period, are fairly potent:

California Indica
Double Gum
Sensi Skunk


Outdoor Marijuana Strains For Beginners

For beginners growing outdoors near the equator, most marijuana strains will do very well. Bear in mind most pure and mainly sativa strains will be harder to grow in comparison with pure and mainly indica strains.

For beginners growing outdoors in cooler climates, these marijuana strains can be considered. They are relatively inexpensive, easier to grow, produce a large harvest, have a short flowering period, are fairly potent:

Early Skunk
Hollands Hope


Further Details

The three species in the cannabis genus are Cannabis indica, Cannabis sativa, Cannabis ruderalis. Although there are pure strains, most cannabis plants grown as marijuana are a mixture of Cannabis indica and Cannabis sativa.

Some marijuana strains have Cannabis ruderalis genetics bred into them. A strain with Cannabis ruderalis genetics does not necessarily mean the potency or quality of the product produced will be inferior.

Cannabis indica originated in an area more distant from the equator, when compared to Cannabis sativa plants. Because of this Cannabis indica plants requires less light and deal with cooler temperatures a bit better.

The Cannabis sativa species originated in an area closer to the equator. Because of this it requires more light and prefers slightly warmer temperatures when compared to Cannabis indica plants.

The greater the percentage of a species that the particular marijuana strain the seed is comprised of, the stronger the plant traits will be to that species.

For example, a seed that is 80% Cannabis indica and 20% Cannabis sativa will bear more properties of a pure indica plant than a pure sativa plant.

A seed that is 80% Cannabis sativa and 20% Cannabis indica will bear more of the characteristics of a pure sativa plant. In general, the greater the sativa percentage, the harder the strain will be to grow indoors.

A novice indoor cannabis grower should think about seed that is indica. A pure indica or mainly indica strain will be capable of producing high quality potent marijuana even at light levels as low as 250-400 watts.

An indica/sativa mix, mainly sativa, or pure sativa strain will need at least 600 watts, and depending on the particular variety more light might be required. The more sativa heritage, the greater the intensity of light it will need.

An outdoor grower should take into consideration the climate the plant will be cultivated under when choosing the best cannabis strain for their growing environment.

A person growing outdoors in an area relatively far from the equator with shorter growing seasons, cooler temperatures, less intense sunlight, will want a strain with more Cannabis indica heritage.

If you live in a part of the world that is close to the equator with a longer growing season, warmer temperatures, strong sunlight, you might want more Cannabis sativa heritage.

Outdoor growers in a cool climate should select an easy to grow strain that matures quickly. After you raise a few crops and gain some experience, you may wish to try a more difficult to grow strain.

Frost will wipe out your crop, be sure to get a strain that grows fast for your first few crops. If there is still time left in the grow season after you harvest, you can use a seed that takes longer to mature for the next growing season.

Outdoor growers near the equator should select a strain that takes longer to mature, because they will usually produce a larger quantity of marijuana. Even in a cool climate, one pound or more of dried marijuana bud per plant can easily be harvested from most outdoor strains.


Cannabis indica

Cannabis indica is a species of cannabis that originated in Asia. It is now cultivated in most parts of the globe. For centuries in Asia, especially areas that surround the Himalayas, Cannabis indica has been cultivated by humans to produce hashish.

When allowed to grow freely, an indica plant seldom exceeds 7 feet/2 meters in height. Cannabis indica plants take less time to mature and can grow very well under less light than sativa plants.

Cannabis indica strains don't get as tall as Cannabis sativa strains but they are wider and more bushy. A short Cannabis indica strain is preferred for growing in an area where height is a consideration, like when being grown indoors.

Cannabis indica compared to Cannabis sativa:
Easier to grow.
Ready to harvest earlier.
Originated in a cooler climate.
Requires less intense light.
Grows shorter and wider.
Has wider leaves.
Produces less potent marijuana.


Cannabis sativa

Cannabis sativa probably originated in Southern Asia. It is now cultivated in most parts of the globe. When grown outdoors, some Cannabis sativa strains can attain a height of 20-26 feet/6-8 meters.

Cannabis sativa plants cultivated to produce marijuana, are generally higher in THC than indica plants. This means marijuana from a mainly, or pure, Cannabis sativa strain will produce a stronger high, when compared with a similar weight of marijuana from a Cannabis indica plant.

Cannabis sativa plants need more light and take more time to mature than indica plants. They are best suited to growing outdoors in areas with long summers, near the equator. Indoors they are very hard to keep from getting too tall.

Cannabis sativa compared to Cannabis indica:
Harder to grow.
Take longer to mature.
Originated in a warmer climate.
Needs stronger light.
Grows taller and narrower.
Has narrow leaves.
Produces more potent marijuana.

Keep in mind that a tall strain can grow to a height of 20-26 feet/6-8 meters. At that height, plants can draw attention to themselves. When security is a concern, be sure to choose a seed that won't get too tall.


Cannabis ruderalis

Cannabis ruderalis originated from stray Cannabis sativa seeds that were employed in the production of hemp, and grew wild.

Cannabis ruderalis can be found growing wild across the globe, often in patches and along roads near places where hemp was once cultivated. These wild plants are commonly called ditch weed.

It doesn't grow tall, usually 3 feet/0.9 meters or less. It can grow in relatively harsh climates that would stunt or kill indica and sativa plants grown under similar conditions.

It will flower according to its age regardless of the plants daily exposure to light, called the photoperiod. Both Cannabis indica and sativa require a shorter day to trigger flowering.

The species is not cultivated for its THC content, because of the small amount it produces. Some breeders have crossed Cannabis ruderalis with other marijuana strains to isolate, one or more of, the unique qualities it processes.

The resulting marijuana seed strains retain their potency but may auto-flower, stay short, be more resistant to harsh conditions, because of the Cannabis ruderalis heritage.