Feminized Seeds

To guarantee feminized cannabis seeds that produce top-quality female plants, an expert team of breeders conducts a meticulous genetic selection process. To achieve the ideal genetics, they use the best and most exclusive parentals available, selected specifically for their desired traits. This process ensures that each feminized seed delivers optimal yield and flowers of the highest quality.

For this reason, the best seed banks invest extensively in genetic selection, making them a better choice than bulk seeds due to the quality, selection and stabilization work behind them.

When considering the best reasons to choose feminized seeds for cannabis growing, instead of regular seeds, there are several significant known benefits that make this option the best choice for most cannabis growers:

• Eliminates Male Plants: Choosing feminized cannabis seeds helps prevent the appearance of male plants in your grow room, avoiding pollination issues that could ruin your precious harvest.
• Optimizes Time and Effort: Growing quality feminized seeds from the start, compared to regular seeds, drastically reduces the time and effort needed to identify and remove all the male plants from the growing area.
• Improved Yield: Using feminized seeds ensures that all plants will flower and form buds at the same time, which wouldn’t be possible if the grower decides to grow from regular cannabis seeds.
• Quality Production: We recommend choosing feminized cannabis seeds from the best seed banks, as they are generally more stable and uniform, leading to higher-quality and higher-yielding harvests.
• Ease of Cultivation: Feminized seeds are the ideal option for beginner growers since they eliminate the challenge of identifying plant gender at the pre-flowering stage, which can be quite challenging sometimes.
• Cost-Effective: Feminized seeds are a more economical choice, reducing the cost and quantity of materials needed when compared to regular seeds, such as nutrients, substrates, pots, etc.
• Maximizes Growing Space: Knowing the exact number of female plants that you will have, helps you better organize your grow space. For indoor cannabis growers, the use of feminized seeds is very important due to the limited space available.

There is currently a wide range of strains available in feminized seed format on the market, with a lot of new varieties emerging every year. A good number of growers, who always aim to have the best and latest feminized cannabis seeds, are eager to be the first to learn about new releases and discover the top varieties that reach the cannabis seed market.

To make your search easier, here is a selection of the best feminized seed strains currently available:

Diablo Rojo XL Auto®

If you’re searching for the best feminized seed strains that were recently released, then Diablo Rojo XL Auto® (SWS110) should be on top of your shopping list. This strain was awarded first place at the IV Autoflower World Cup, 2024, in Barcelona.

This autoflowering plant has a sweet and fruity aroma, with hints of red fruit and a delicious background of cola-like freshness. Diablo Rojo XL Auto® is known as one of the autoflowering strains that delivers the most powerful, relaxing, and uplifting effect.

Green Poison F1 Fast Version®

This strain is the ultra-fast version of Green Poison® (SWS14), one of the most awarded strains in the cannabis world. Green Poison F1 Fast Version® (SWS41) is a very special cannabis strain that offers a potent effect, high yield, and plenty of resin, allowing you to harvest high-quality buds in less time than most other photoperiod-dependent strains, with the added benefit of strong resistance to humidity.

This combination of potency, sweet aromas, and high yield in a short time frame, makes this strain a favorite for beginner growers looking for feminized seeds, whether for indoor or outdoor grows where early harvesting is essential to avoid the first autumn rains and cold nights.

Gorilla Girl®

Among all the photoperiod-dependent feminized seeds, Gorilla Girl® (SWS74) stands out with its THC levels reaching up to 31%, making it one of the most potent strains currently available in the market of feminized cannabis seeds.

This photoperiod-dependent strain is not only incredibly powerful, but it also offers plenty of intense aromas and flavors from its resinous and compact buds. It originates from a cross between Gorilla Glue and Girl Scout Cookies, two high-quality genetics, made in the USA.

+Speed Auto®

This classic autoflowering strain is known as the fastest strain among all the autoflowering strains available on the market. +Speed Auto® (SWS27) is a plant that requires just 7 weeks from germination to harvest, making it undoubtedly the fastest autoflowering cannabis strain that you can find.

Despite its speed, this strain produces thick, resinous buds with sweet and fruity aromas, and it is ready for harvest quite sooner than any other plant you've ever grown.

Sweet Mix

Our Sweet Mix packs are the ideal option for those who find it difficult to decide which high-quality cannabis strains to grow: Sweet Mix Photoperiod-Dependent® and Sweet Mix Auto®.

In these 10-seed packs, you can find strains with Jack Herer genetics like our Black Jack® (SWS01) or Big Devil XL Auto® (SWS28), Haze genetics like Sweet Amnesia Haze® (SWS72), and some of our best Indicas such as Mohan Ram® (SWS09), created from an elite White Widow clone, or the delicious and classic S.A.D. Sweet Afgani Delicious S1® (SWS02).

In these mixes, you’ll also find red-flowered versions like Dark Devil Auto® (SWS38), Tropicanna Poison F1 Fast Version® (SWS85), or Red Hot Muffin (SWS83), among many other delightful strains.

At Sweet Seeds®, we offer the highest-yielding and best-quality feminized seeds, with a feminization rate close to 99.9%. This makes feminized seeds a better option compared to regular seeds, as they eliminate the worry of male plants interfering with your cannabis grow operations, saving you both time and money.

Feminized seeds produce plants that are more stable, more homogeneous, and of excellent quality. They are easier to grow and produce exclusively female cannabis plants, which yield the most desired and sought-after, seedless flowers (sinsemilla). This makes them the top choice among cannabis growers, both beginners and experts.

Whether you are an experienced grower or new to cannabis growing at home, if you decide to use Sweet Seeds® feminized cannabis seeds, success is within reach for every of your harvests.

Our seeds stand out for their intense and lasting flavors and aromas, surpassing the quality of other cannabis seeds that you can find on the market. With years of experience in cannabis breeding and seed production, we’ve achieved the highest standards for developing the best feminized seed strains. We are a pioneering seed bank in feminized seed production and the first to commercialize F1 Fast Version® seeds. If you’re looking for top-quality feminized seeds that will deliver outstanding results, you can be sure that you’ve come to the right place!

Our extensive catalog includes both sativa and indica feminized seeds, with different THC and CBD percentages. Sweet Seeds® offers a wide range of top-quality feminized strains, including:

• Photoperiod-Dependent Seeds: Known for their stability, high flower and trichome production, and unique, delicious aromas.
• Autoflowering Seeds: Discreet, fast, and of the highest quality.
• F1 Fast Version®: Ultra-fast-flowering and photoperiod-dependent versions of some of the most beloved classic strains in our catalog.
• USA Strains: Photoperiod-dependent and autoflowering cannabis seeds with genetics from the USA.
• The Red Family: Strains that display purple and reddish tones during the flowering stage.
• CBD: High-CBD strains that can be photoperiod-dependent or autoflowering.

To maintain the highest quality and preserve the seeds, all our seeds are packed in dedicated storage containers for optimal conservation.

We offer packs of 3+1 and 5+2 seeds, and Sweet Mix® packs with 10 seeds. What are you waiting for to try the best feminized cannabis seeds? We’re here for you!

How long does it usually take for a feminized plant to reach maturity?

A feminized cannabis plant reaches maturity within 2 to 3 months from the beginning of flowering. This period may vary depending on the type and genetics of the strain.

Autoflowering strains complete their maturity around 2 months after germination and the appearance of cotyledons.

Generally, feminized photoperiod-dependent strains grown outdoors reach maturity between 8 and 12 weeks after the start of flowering, depending on the specific strain aswell. Indica strains typically mature in about 8 to 10 weeks, while Sativa strains can take up to 12 weeks. Indica-Sativa hybrids usually fall somewhere in between these timelines.

Then we have the fast photoperiod-dependent strains from Sweet Seeds®, the F1 Fast Version® collection, with shorter flowering periods and therefore a quicker maturity timeline. 

What distinguishes photoperiod-dependent feminized seeds from autoflowering feminized seeds?

The key difference between photoperiod-dependent feminized seeds and autoflowering feminized seeds, lies in how the flowering stage is triggered. Photoperiod-dependent plants need a change in the light cycle (hours of light) to begin flowering, while autoflowering plants flower automatically regardless of the light cycle. For this reason, autoflowering strains are often called "automatic" since they bloom automatically, no matter the number of hours of light they are subjected to. 

What is the process for producing feminized seeds?

Various methods exist for producing feminized seeds, all of which aim to induce one of the parent plants (female) to produce pollen with XX chromosomes. This feminized pollen can then pollinate another female parent, generating seeds that will grow only female plants.

Here are some of the methods that can be used to obtain feminized seeds:

• Stress Application: Often referred to as rodelization, this was one of the first methods used for the production of feminized seeds and is the most eco-friendly method of all.
• Silver Thiosulfate (STS): This method involves spraying a solution of silver nitrate, sodium thiosulfate, and distilled water on the flowers of the plants from which the grower wants to collect the pollen, prompting male flower formation.
• Colloidal Silver: Applied in a similar way to STS, this method uses a colloidal silver solution to reverse the sex of the plant, resulting in male flowers that produce feminized pollen.
• Gibberellic Acid: This approach, that works in the same way as the colloidal silver use, relies on gibberellins—plant hormones that stimulate cellular growth.

At Sweet Seeds®, we use the sex-reversal method via Silver Thiosulfate (STS) application to produce our feminized seeds. 

What are the signs that a feminized seed has started to germinate?

If you are new to cannabis seeds, you will know germination has begun when the seed cracks open, revealing a small root, known as the radicle, emerging from the seed shells.

If the seed is planted in soil and out of view, you will know it has germinated once it starts breaking through the soil surface, showing the cotyledons and later the first pair of leaves.

Does the lunar phase affect the germination of feminized seeds? What is the ideal phase?

The lunar phase can indeed influence the germination of feminized seeds, with the ideal phase being the waxing crescent moon. However, it’s important to consider the timing carefully, as you may miss the season for outdoor growing if you choose to wait for the ideal lunar phase.

Some tips for germinating feminized cannabis seeds based on the lunar phase include consulting a lunar calendar and keeping environmental conditions optimal to ensure successful germination and early development of the cannabis plants. 

How can I stimulate my seeds to grow faster from germination onward?

To encourage faster and more vigorous growth in your seeds from the early stages of their life cycle, consider using growth boosters such as rooting hormones and bio stimulants. These products can help to promote strong root development from the first stages of growth.
Also, be sure to maintain ideal germination conditions, such as proper temperature and humidity, as incorrect settings can even prevent germination altogether.