Feminized cannabis seeds have finally established themselves in the indoor sector. The stable indoor conditions are optimal for feminized seeds. Most indoor cannabis seeds produce medium sized and compact plants. You can immediately see how tall all cannabis varieties in our offer will grow. This is an important selection criterion for indoor cultivation. Here you will find the best and most popular indoor cannabis seeds.

Definition - What are indoor cannabis seeds?

Growing indoor cannabis seeds is one of the most popular methods of growing high-quality, potent cannabis plants. The fully controllable environment allows seedlings to reach their full growth potential and deliver optimized yields. This allows growers to cultivate cannabis with impressive THC levels and premium flavors - all without the prying eyes of neighbors.

It also makes sense for novice growers to start their first growing experiments in an environment that can be fully optimized. Autoflowering strains are best suited for indoor cultivation, as well as traditional photoperiod feminized strains that have a smaller growing height. Old-school expert growers who like to experiment with new strains can also grow regular cannabis seeds indoors.

Indoor seeds - just like outdoor seeds - are planted and grown into small seedlings that later grow into real plants with cannabis flowers. It is crucial to pay attention to high quality seeds so that abundant harvests are guaranteed.

Indoor or outdoor - What is the difference?

Indoor and outdoor seeds differ not only in the way they are grown. Indoor seeds already have different properties and characteristics during cultivation and require completely different growing conditions than outdoor seeds.

Indoor cannabis seeds are designed to be grown in controlled environments such as greenhouses or homes. They are often more compact and have a lower growing height, so limited indoor space is not a problem. Indoor cannabis plants usually have a shorter growth cycle than outdoor cannabis, produce flowers faster, and have a comparatively higher THC content. Many indoor strains would not survive outdoor cultivation in most latitudes. They are not weatherproof enough, nor do the outdoor growing conditions provide them with the right conditions to form flowers.

Outdoor cannabis seeds, on the other hand, are designed to be grown outdoors and have characteristics that make them suitable for outdoor growing conditions. For example, the plants are larger and taller overall, as they also have significantly more room to grow. Outdoor cannabis usually takes a little longer to start flowering and the flowers often have a lower THC content.

There is no general answer as to whether indoor or outdoor seeds are better overall - it all depends on the circumstances and desires of the grower as to which type of seed they choose. Both indoor and outdoor cannabis seeds should come from high-quality genetic lines so that they can deliver good yields and top-notch quality.

Definition - What are feminized seeds?

Feminized seeds are bred seeds that have a very high probability of forming into a female cannabis plant. Most growers prefer to grow female plants because they produce large inflorescences, also known as buds, in which there are high cannabinoid contents, making them ideal for harvesting.

Feminized plants are not the same as photoperiod plants - while the first term refers purely to the sex of the seed, photoperiod describes the development of the plant, which is influenced by the light cycle.

The advantages of feminized seeds

Many seed banks offer a wide range of feminized seeds, as they offer a number of advantages for growers:

  •         The sex of the plant does not have to be determined, but is already known when the seed is purchased.
  •         The probability that the plant will produce flowers is very high.
  •         The choice of different seed varieties is huge and suitable for all tastes.
  •         Their genetics are stable, reliable and uniform.
  •         Maximum strength and first-class aroma are guaranteed.
  •         Higher yields compared to autoflowering and regular seeds can be expected.
  •         Feminized seeds are suitable for indoor and outdoor growing.
  •         There are different THC and CBD contents for different purposes.

The choice of feminized cannabis seeds

When choosing suitable feminized seeds, some factors should be considered, including the characteristics and properties of the strain in question such as:

  •         Plant size
  •         Cannabinoid content
  •         Flowering time
  •         taste and aroma
  •         outdoor or indoor

However, budget also plays a role, as the cost of feminized seeds can vary significantly depending on the breeder and variety. To make cultivation as successful as possible, feminized seeds should always be bred by reliable seed banks, as they value top-notch genetics.

Differences of Indica and Sativa in feminized seeds

Feminized seeds can be divided into two categories: Indica and Sativa. These terms are often associated with the effect of the strains, although they basically only describe the properties, characteristics and terpene profile of the plant.

Indica plants tend to have a compact, bushy structure and usually remain smaller. The leaves tend to be short and broad, and the flowering period is shorter than that of sativas, making the plants ideal for rainy, colder climates.

Sativa plants, on the other hand, tend to be taller and have long branches and thinner leaves. The flowering time is significantly longer than that of indica varieties, which is why this subspecies thrives especially well in warm climates with plenty of sun.

Many cannabis seeds cannot be categorized as either indica or sativa. Instead, many seeds contain a mixture of both genetic profiles, which is also known as a hybrid. Hybrids thus exhibit characteristics of both subspecies - the data sheet of a cannabis variety gives more precise information about the ratio of genetics, so that the characteristics of a plant can be better predicted.

Cultivation criteria

In order for a cannabis plant to thrive indoors and produce strong yields, several factors must be considered and needs of the plant must be met. First of all, for indoor cultivation, the weather conditions and also the climate zone have no influence on the cultivation and can therefore be neglected. So whether you start gardening in winter or summer is irrelevant. Therefore, in indoor growing, growers are free to choose the variety they want and create the appropriate growing conditions in the growing room.

Important factors here are:

  •         The right temperature
  •         The right humidity
  •         The number of hours of sunlight
  •         The air supply

While some varieties already do great on a windowsill with a little water and nutrients, other plants need a little more care and attention.

Good reasons for indoor growing

As long as good growing conditions are created, indoor seeds can be grown any time of year - all year round. But that's not the only advantage of indoor growing:

  •         Several harvests can be harvested per year.
  •         The risk of pest or vermin infestation is significantly reduced.
  •         The risk of foreign access as well as the risk of being discovered is lower.
  •         Constant control of the plants and growing conditions is easier.
  •         Growing conditions can be easily influenced.


Indoor cannabis seeds are characterized by a wide variety of varieties, all of which have different characteristics. Most plants in this category have a compact size that is ideal for indoor growing. There are differences, for example, in the flowering time and yield - here, depending on the desire and need, it is possible to choose a variety that has the appropriate characteristics that the grower envisions.

Flowering time

Indoor cannabis seeds are available with different flowering times. For those growers who are in a hurry, there are a number of varieties with a short flowering time. However, some growers place more emphasis on a good yield and accordingly want to invest more time in the growing phase.

Usually, the average flowering time of feminized indoor cannabis strains is around 8 to 10 weeks. Some exceptions may also require a flowering time of up to 14 weeks.

Here's what to keep in mind:

Some tips can be helpful, especially for beginners, to start indoor cultivation successfully:

  •         It makes sense to choose a simple growing method to familiarize yourself with the subject.
  •         Adequate ventilation of the rooms should be done at all times to avoid mold growth.
  •         Cultivation should be done with feminized seeds only in the beginning to get a good harvest.
  •         Similar to normal indoor plants, hemp plants should not be overwatered.
  •         Fertilizer should always be used sparingly.

Are all hemp varieties suitable for indoor cultivation?

Basically, it can be said: Yes, all varieties are also suitable for indoor cultivation. Nevertheless, some varieties are clearly more suitable than others. Autoflowering strains and bushy indicas rarely exceed one meter in height and are therefore more compatible with indoor grows than taller plants.

While autoflowering plants grow completely independent of the light cycle, photoperiod indica strains can thrive ideally indoors due to a self-designed light cycle. This allows the grower to decide for themselves how long to drag out the growing phase and when to trigger the flowering phase.

What is needed for proper cultivation

Proper preparation when growing cannabis indoors is crucial if you want the results to be right. First of all, a location with enough space for the project should be chosen. In the best case, there should be electricity access there and also a source of fresh air such as a window or a ventilation shaft. Beginners in particular should not underestimate the development of odors during the cultivation phase - insulation or filters can also be useful here in some cases.

The growing area should then be equipped with the right equipment: Pots, soil, rockwool, hydro and light sources are the basics that every grower should have at home. It should be kept in mind that cannabis plants usually need a lot of light, and the electricity bill is driven up accordingly.

The right soil

Growing cannabis does not require a specific soil - a soil bought from a flower shop should usually work. However, the soil should definitely have the following characteristics:

  •         It should be well aerated.
  •         It should drain well.
  •         It should be rich in nutrients.

Especially the nutrients nitrogen, phosphorus and potassium should be sufficiently present in the soil. The plant also needs micronutrients such as calcium, magnesium, copper and iron in small quantities to grow. Some fertilizer can therefore be useful from time to time - depending on the soil used.

How to grow feminized hemp seeds

Feminized cannabis seeds for indoor cultivation can be grown either in a grow room or a tent. A greenhouse is also suitable as an intermediate solution of indoor and outdoor grow.

At the beginning of the growing process, the seeds are first made to germinate. To do this, they are placed between moist paper towels or stimulated to germinate with the help of a starter kit. Once the seeds have formed a leaf base, they are transplanted into pots and placed in the grow room or tent. From now on, it is important to regularly control humidity, water supply, ventilation and lighting so that optimal growing conditions for the plant prevail.

To influence the phases of development of photoperiod plants, light is used. The following information can be used as a guide:

  •         A seedling needs about 20 hours of light and 4 hours of darkness.
  •         In the growth phase, the plant needs about 18 hours of light and 6 hours of darkness.
  •         To trigger the flowering phase, the plant must be exposed to 12 hours of light and 12 hours of darkness.

Photoperiodic plants respond to the light cycle in much the same way as they do to the changing seasons in nature. The average time from germination to harvest in this case is approximately 2 to 4 months, although this may vary depending on the variety and also the grower's personal preference.

The ideal temperature during the cultivation phase is about 21 to 25 degrees, although many varieties can tolerate small temperature fluctuations. Care should be taken, however, with extreme changes in temperature, as this could jeopardize the Harvest.

Humidity should be adjusted accordingly depending on the stage of development of the cannabis plant:

  •         A seedling needs a humidity of 65% to 70%.
  •         During the growth phase, 50% to 70% is ideal.
  •         During flowering, the humidity should not exceed 40% to 50%.

Watering the plant should be absolutely regular, but not too frequent, otherwise there is a risk of root rot. Every 1 to 3 days should be enough, paying close attention to whether the plantlet's leaves wilt, turn yellow or curl downward. If the soil still feels moist before watering, less water should be added to the plant.

Excellent feminized cannabis seeds

There are some particularly popular feminized cannabis seeds that are suitable for indoor cultivation and score with good yields as well as a premium taste. We present three of the most popular feminized cannabis seeds in more detail:

Bubba Kush

Bubba Kush is an easy-to-grow indica strain that still offers an outstanding yield. In America, it has been one of the most popular strains since the 1990s and is appreciated by a wide range of cannabis connoisseurs. Bubba Kush is easy to grow, even for beginners, and its small size makes it ideal for indoor use. After 8 to 9 weeks of flowering, the strain can yield a crop of 400 to 600 grams per square meter.

As one of the most famous indica strains, it offers a special pleasure when smoked due to its unique taste. Its great popularity is shown, among other things, by the first prize won in 1996 in the High Times Cannabis Cup. The smell and taste of Bubba Kush can be described with a light coffee, pine and earth aroma. Slightly spicy and sweet notes round out the taste.

The effect of this cannabis strain is surprisingly calming and euphoric, and is therefore enjoyed by many as a sleep aid in everyday life.

5 Alive

The strain 5 Alive is a novelty on the market and accordingly rare are the possibilities to acquire it. 5 Alive is considered one of the best tasting sativa strains ever bred, with its citrus and melon-like aroma. It is also a very potent strain and has a THC content of 25% to 27%. This makes it particularly beneficial for stress and depression, it increases creativity and activity and is also said to help against migraines and PMS.

Although 5 Alive is genetically sativa-dominant, it has many phenotypic characteristics of an indica strain. Its small size and sturdy branches with thick buds also make it ideal for indoor growing. A strong yield of 550 to 600 grams per plant can be expected if ideal growing conditions are maintained.

Alien Technology

Alien Technology is a feminized clone of a popular strain thought to be extinct, making it one of the rare landrace varieties. These occur in their original state in nature and are often better in their original form than any breeding or crossing. The aroma of this strain is earthy, spicy and somewhat reminiscent of cedar, in taste the strain is even somewhat sweet and vanilla.

The indica-dominant plant also exhibits the typically strong and fast-acting effect, which is ideal for relaxing. The strain is also said to help against chronic pain, anxiety and muscle spasms. Cultivation-wise, the plant is also ideally suited for beginners, as it is particularly uncomplicated and easy to grow in its unadulterated purity.

FAQ section

Which seeds for indoor?

In principle, almost all cannabis varieties can also be grown indoors. However, small, compact and bushy Indica plants are particularly well suited due to their size. These also have the advantage of producing larger yields and having a high THC Content.

How long does a grow with seeds take?

As a rule, the growth phase of a cannabis plant lasts between 2 and 3 months, depending on the variety, but significantly longer growth phases are also possible. However, when growing indoors, the grower also has an influence on the lengths of the phases and can decide whether he prefers a fast or a high-yield harvest.

How long do seeds take to germinate?

After the cannabis seed has been covered with moist cloths, a first small root should normally be visible after 2 to 4 days. However, longer germination times can also occur: Under certain circumstances, it can take up to 10 days before the seedlings can be planted in the ground.

Where to get the best seeds?

To get a good yield when growing cannabis, you should always use seeds from high-quality, reputable seed banks for cultivation. Seeds66 has long been one of the best sources for top quality cannabis seeds, sourced from the best seed banks around the world.

Conclusion - Efficient cultivation even Indoors.

Growing cannabis indoors or in a tent comes with so many advantages. Not only do growers have the possibility to grow their favorite strains at any time of the year and to optimally regulate the growing conditions such as light, temperature and humidity - indoor cultivation also brings higher and stronger yields. However, it should be noted that indoor cultivation takes up a lot of energy and space, which can result in higher costs for growers.