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Polyhybrid cannabis seeds for sale

Breeding and improving cannabis varieties

Many times we hear or read terms related to cannabis varieties that we do not understand very well. F1, Landraces, Bx3 or IBL are concepts that sometimes are associated with the name of a certain strain, but do we know exactly what they mean? In this post we will try to clarify the issue, are you interested? Let’s start in chronological order…

⭐ Pure varieties or Landraces

They are the native genetics of a given geographical area, some of them emerged spontaneously, from seeds carried by the wind or by some animal, and others were carried by humans to new regions or countries. These plants have evolved over the years, adapting both to the climate and to the unique factors of that particular environment: the soil, the spectrum of light, the amount of CO2, etc.

Landraces have never been mixed with other varieties, maintaining those specific traits that make them unique, so they are also called pure lines. These strains can include Sativas, Indicas, Ruderalis and even Afghanics, which are cannabis subspecies. This classification basically depends on the geographical latitude and altitude, and from these genetics have emerged all the hybrids and polyhybrids that we have nowadays. Some examples of these plants are the Colombian Punto Rojo, the Afghan Deep Chunk or the Pakistan Chitral Kush.

When we receive a Landrace genetics already manipulated by the human and we continue working it this line can be called “Purebred”, and if we don’t know how many generations of “artificial” work it has, we will call it Fn (Filial elevated to N) and from that line each generation will be called Fn+1, Fn+2, etc…

One of the cannabis strains that changed the cannabis landscape in the United States in the 1960s, and inspired a whole generation of artists, the legendary Chocolate Thai sativa…

Bank: PEV Bank Seeds. Type: Feminized.
Genetics: Chocolate Thai x Big Bud x Chocolate Thai.
Flowering period: 60-65 days
Phenotype: Sativa.
Harvest ext.HN/HS: Mid-October/Mid-April
Outer/indoor production : 900g/plant / 550 g/m2.
THC: 22 % – CBD: 1.2 %.

⛳ F1 hybrids, the first mixtures of varieties

They are varieties that mix the genes of 2 pure strains. Many times we read or hear this term in polyhybrids, but it can really only be used properly for this purpose, that is, the first generation resulting from the union of 2 Landraces.

These plants have certain advantages, enjoy hybrid vigour and remain very uniform, but they also have some drawbacks. Hybrid vigour is a factor that provides extra strength and resistance when 2 geographically distant varieties are combined. This is because they acquire traits from both parents, about 50% of each, so offspring are capable of withstanding pests and diseases which are common to the areas from which their ancestors originated. Another reason why this happens is because pure genetics suffer some degeneration due to inbreeding, caused by consanguinity, that is, by crossing only between them. This is automatically corrected by crossing it with another strain, the more different or geographically distant the better.

When 2 of these F1 hybrids of the same variety are crossed, F2 hybrids are produced (2nd Filial or 2nd generation) but they are no longer stable offspring. About 25% will resemble one of their grandmothers, about another 25% the other grandmother, and the remaining will be a heterogeneous mix of both.

If we continue to cross between the F2s we will produce F3 hybrids, but the result will be a little more unstable. In these generations, the breeder‘s experience is crucial when selecting the parents to be crossed, which can stabilize some traits in the offspring or lose them forever. Reina Madre from Original Delicatessen or Orient Express from ACE Seeds are 2 good examples of F1 varieties.

✨ Regular seeds. What are they ?

They are the result of a cross between a male and a female, and are also called Standard seeds. This is the original format of cannabis seeds, the way nature produces them, and until just 2 decades ago they were the only ones available.

Whenever a male plant is involved in a cross, the offspring will be regular, i.e. both males and females will come out randomly. There can be regular photodependent, autoflowering or any kind of seeds.

Polyhybrids or hybrid mixtures

When 2 F1 hybrids from different lines are crossed, polyhybrids are created, for example White Widow X Sandstorm. White Widow is a cross between an Indian sativa and a pure Brazilian variety and Sandstorm is a Pakistani crossed with a Moroccan male. When 2 polyhybrids are crossed the resulting specimens are also called polyhybrids.

The first generation of the cross between 2 of these hybrids can be considered F1 as well, but they would be F1 polyhybrids. In this case, the distribution of genes that happens when two pure varieties are crossed is not respected, and the offspring is usually heterogeneous. Many times these crosses are called F1 hybrids but it is really a wrong concept, because they are polyhybrids. Real F1 hybrids can only be descended from a cross between Landraces or IBL strains.

Wedding Cake is the most popular cannabis variety in the United States, and no wonder, as this plant offers you enormous potency, a delicious taste, and an incomparable amount of resin …

Bank: PEV Bank Seeds. Type: Feminized.
Genetics: Triangle Kush X Animal Mints
Flowering period: 65 days
Phenotype: 30% Indica/ 70% Sativa
HN/HS outdoor harvest : Mid October/Mid April
Outdoor production: 1 kg/plant
Indoor production: 450 g/m2.
THC : 25% – CBD : 0,4% – CBG : 0,1%

IBL cannabis varieties

IBL stands for Inbred Line, which means breeding on a non-Landrace line until it becomes uniform or “pure”. There are several ways to get an IBL variety, through backcrossing or after several generations of inbreeding, minimum up to F5, but it depends on the initial stability of the genotype chosen to become IBL

IBLs created by backcrossing or Bx

An example of IBLs achieved through backcrossing is Reservoir Seeds Sour Diesel IBL. They chose the elite clone known as ECSD (East Coast Sour Diesel) and used a New York Diesel male from Soma Seeds to create the Bx1 offspring. From that offspring they selected a male as close to the mother as possible and used it to re-pollinate the ECSD and produce the next generation, in this case Bx2. In the next step they did the same thing again, selecting a good male to backcross, but in this generation they already found more phenotypes similar to the initial elite clone, so they continued backcrossing until most of the offspring were fairly homogeneous, sharing the traits that made ECSD so famous.

Another example of this way of creating IBL plants is Brothers Grimm’s Cinderella 99, in this case with a weed bought in a coffee-shop in Holland that fascinated him, supposedly Jack Herer, where some seed came out, which he called Princess once grown and preserved as a mother plant. After a couple of backcrosses the offspring already had about 75% of homogeneity, due to the great dominance of the Herer surely. He called this generation Princess 75, he backcrossed again and then he achieved a stability of phenotypes of approximately 88%, so he called it Princess 88. With a last backcross the traits of the Princess were just fixed in 99% of the individuals, so it could be considered IBL, which he called Cinderella 99.

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IBL genetics by crossing subsidiaries

Among the IBLs achieved through crossing generation to generation, the Skunk#1, Blueberry or Northern Lights stand out. These varieties were made from the late 70’s to the early 80’s on the west coast of the USA. At that time, indoor cannabis growing was not yet widespread, so no mother plants were preserved, leaving them no choice but to cross between the best phenotypes of each generation. Both Skunk#1 and Northern Lights stabilized after an indeterminate number of generations, and the Blueberry came out of the same line as the Flo, but was then stabilized by DJ Short for several generations. Within each of these strains there are certain variations in the offspring, but in general they share many traits with each other.

What is the best way to create IBL varieties ?

Each technique has its advantages, but we have to understand that the result is different, because stabilizing features through backcrossing is faster, but inbreeding degeneration comes much earlier. This is because we work with the genes of a single phenotype, especially from Bx3. On the other hand, when a line is stabilized by means of generation-to-generation crosses, we work with populations of different phenotypes and, although more time is needed to homogenize the progeny, in the long run it is much more interesting since they generally contain much more hybrid vigor.

Feminized or 100% female genetics

These plants come from the cross between 2 females, both with XX sex chromosomes, so all the offspring are also XX, that is, females. In order to cross 2 female cannabis plants it is necessary to reverse or invert the sex of one of them, so that it can produce male flowers and pollinate the other female.

Not all feminized varieties fulfill the purpose of producing only female plants, but this has to do with poor selection of parents. When sexually pure stress resistant females are used, 100% of the progeny are female as well, and usually stress resistant.

This kind of marijuana seeds succeeded especially in Europe, first with the extinct No Mercy Supply bank, and later with Dutch Passion, although they were not really stable. Later on, Dinafem was the first company that came out to the market offering only feminized varieties, but in this case created from Mohan Ram‘s method, that is, with Silver Thiosulphate (STS). If you want to see how this process is done in detail, I recommend reading this article that talks about how to make feminized cannabis seeds.

S1 feminized seeds. What are they ?

They are the result of the crossing between a female plant by itself, therefore they are always feminized. These seeds sometimes arise spontaneously, as some plants produce one or a few male flowers, but in this case as they come from plants with a hermaphroditic point, these seeds will always be female but also prone to hermaphroditism.

To produce good S1 offspring it is necessary to select a sexually pure female, just like to create normal feminized seeds. The best way to test the sexual stability of a cannabis plant is to subject it to different types of stress, those that do not form male flowers under any circumstances can be used to create 100% feminized plants. But to produce good S1 plants it is not enough to use sexually pure females, ideally they should be made from varieties that are as homogenous or stabilized as possible, so that the offspring are as well.

The great advantage of this way of breeding is that in one step you can get a good stability, but only if you use a suitable plant, as I said before.

But there is also some inconvenience, since by using a single phenotype many times they cannot continue to breed among themselves, because degeneration by consanguinity comes very soon, and sometimes S2 are already deformed or worse than S1. There are quite a few varieties offered in S1 format in the current cannabis market, among which we highlight the White S1 by Raskal, the Grandaddy Purple S1 by Connoisseur genetics or the S.A.D. S1 by Sweet Seeds.

S.A.D. S1 has established itself as a well known variety in Valencia, winning 2nd place in the Cannabis Cup organized by Maria Barraca in 2004…

Bank: Sweet Seeds
Type: Feminized.
Genetics: Afghani
Flowering period: 8-9 weeks
Phenotype: 90% Indica / 10% Sativa
Outdoor Harvest HN: End of September
Outdoor Harvest HS: End of March
Production outdoor: 350-550 gr/plant
Production indoor: 400-500 gr/m2
THC: 15-20% – CBD: 1.8%

✅ Automatic flowering cannabis varieties

Auto varieties are mainly descended from the ruderalis subspecies, although they can also be created from some semi-autoflowering landraces. They originally come from northern latitudes or high altitude areas, where the summer is short and the plants have to hurry to flower and mature in order to continue the lineage.

To create a new automatic flowering hybrid it is necessary to incorporate the genes responsible for autoflowering from another plant, and to be able to stabilize this trait in all the offspring it is necessary to have at least 3 generations, and in some cases more.

The first seed bank to start selling strains with Ruderalis genes was The Seedbank, owned by the great Neville Schoenmakers, who later took them to Sensi Seeds, where they created Ruderalis Skunk and Ruderalis Indica, but they were semi-autoflowering hybrids, lacking the final step to get all the specimens to be automatic flowering. The first 100% autoflowering commercial seeds were Joint Doctor’s Lowryder, from which came the much improved Lowryder#2, the ancestor of the vast majority of autos nowadays.

Fast version, early o quick, the fastest photodependents

The generation resulting from the cross between a photodependent variety and its own autoflowering version is called fast, early or quick. The first seed bank to officially start marketing these plants was Sweet Seeds, although we suspect that other banks did this before without saying so. Some examples of these plants are the Cream Caramel Fast Version from this same bank, the Quick Gorilla from Dinafem or the Sugar Black Rose from Delicious Seeds.

Cannabis polyploid, triploid and tetraploid

As a general rule, cannabis plants are diploid, which means that they contain 2 chromosomes that are responsible for transmitting the genetic information for each trait to the offspring. However, sometimes some polyploid specimens appear randomly in a natural way, which can be triploid (3 chromosomes for each trait) or tetraploid (4 chromosomes) which arise as a malformation.

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There are also ways to artificially produce this type of plant, with the application of colchicine, an alkaloid that comes from a plant known as Colchicum Autumnale. One of the advantages of polyploid plants is their size, which is usually larger, especially the tetraploids, which in some cases form 4 branches per node, increasing the harvest significantly. An important factor of the triploids is that they are practically sterile, and this can be negative and positive at the same time, depending on how you look at it.

The Valencian seed bank Buddha Seeds (Spain) did a series of experiments with polyploid plants, where they empirically demonstrated many of these aspects. We hope that in the near future we will be able to have more information about this, as we find it a very interesting topic.

Image of a polyploid cannabis plant with the typical crest at the main tip*


There are many ways to do cannabis breeding, and depending on the seed format or the goal we have when creating a new variety we will choose one method or another. I hope you liked this post and, if so, I would like you to share it to spread the information and reach all cannabis lovers.

Compound Genetics

Compound Genetics is a US seed bank based in the state of California. It was created by two friends, passionate people and marijuana lovers who through many years of hard work cultivating and selecting varieties, create new and exciting high level genetics.

Compound Genetics motto is “We serve the plant”, the proof of their natural passion for the cannabis plant. Their work is a guarantee of quality, as the selection and testing of all their genetics is the method to ensure that all their genetics are of the highest standard.

Compound Genetics creators of Jet Fuel Gelato, Coma Cake, Horchata and Ice Cream Man

The seed bank has created new genetic lines from genetics such as Legent Orange Apricot. This variety is a collage of several world-renowned strains. Among these we find works of great reputation breeders like Cannarado, Capulator, Crane City, Harry Palms, Jungle Boys, Oni Noodles and Seeds Junky Genetics among others.

Compound Genetics is continuously evolving. Its creation process never stops either with its own crosses or with collaborations with other banks. An example is Coma Cake, a cross between Coma Og by Compound and Wedding Cake by Seed Junky, one of the strains with great cannabis potential.

Jet Fuel Gelato (Gelato 45 x Jet Fuel Og F1) is another of the varieties used to create a genetic line that is capable of passing on incredible flavour and power to its descendants. These new hybrids inherit the tremendous organoleptic profiles that stand out both in the buds consumed using a Cannabis vaporiser or in resin extractions.

American flavours and aromas with a great psychoactive power

The Menthol, Gelato 45 x (White Diesel x (High Octane x Jet Fuel), is yet another of the cuttings used as a base for new marijuana strains creation. Selection work carried out through multiple crosses leads to the development of proven quality new great varieties.

This US seed bank usually works with limited edition strains. It is important to be alert for especial opportunities to buy seeds from Compound Genetics because often the stock is quickly exhausted and it will not be possible to get those strains again.

Tiger Bomb – Compound Genetics

We are glad to present Compound Genetics Tiger Bomb, a feminised variety now available in our cannabis seed catalogue at This Indica dominant poly-hybrid is a cross between MAC 69 [Alien Cookies (Colombian Landrace x Starfighter)] an [. ]

  • 13 seeds (Product sold out) 132.00€

Lemon Apricot – Compound Genetics

Alchimia presents Lemon Apricot by Compound Genetics seed bank. This regular cannabis plant is a cross between Jungleboys Lemon Jack and Legent Orange Apricot F2, two incredibly fruity varieties. The result is a hybrid characterised by a powerful org [. ]

  • 13 seeds (Product sold out) 130.00€

Tokyo Snow – Compound Genetics

Alchimia is glad to present Compound Genetics Tokyo Snow, a cannabis poly-hybrid cross between Hibachi Supreme (GMO x (Legend OG x Kobe)) x The Menthol ((Gelato 45 x (White Diesel x (High Octane x Jet Fuel G6)), resulting in a variety that offers new [. ]

  • (Product sold out) 132.00€

Khalifa Mints – Compound Genetics

Khalifa Mints by Compound Genetics is a feminised hybrid cross between Khalifa Kush and The Menthol, a new cannabis genetics that offers a powerful flavour and an intense relaxing effect. Khalifa Mints, an Indica poly-hybrid with relaxing properties [. ]

  • 13 Seeds (Product sold out) 132.00€

Kool Grapes – Compound Genetics

We present Kool Grapes by Compound Genetics, an Indica dominant regular cannabis plant (85%). It is a cross between (High Octane x Grape Pie) and The Menthol, two strains with great potential that offer 100% taste and 100% potency. Kool Grapes is an [. ]

  • (Product sold out) 130.00€

Mafia Funeral – Compound Genetics

Alchimiaweb is happy to present Mafia Funeral by Compound Genetics, a feminised variety cross between Garlic Grove 55 and The Menthol, a Gelato 45 x (White Diesel x (High Octane x Jet Fuel G6) hybrid. This variety adapts well in indoor and outdoor c [. ]

  • 13 seeds (Product sold out) 132.00€

Vapor Fuel – Compound Genetics

Alchimia is happy to present Vapor Fuel by Compound Genetics seed bank, a regular cannabis plant cross between (Chem Dog x I95) x The Menthol. These two poly-hybrid parents have been created from top-line cannabis hybrids that contain an extensive ge [. ]

  • 13 seeds (Product sold out) 130.00€

Blue Agave – Compound Genetics

We are happy to present Compound Genetics Blue Agave, a feminised cannabis hybrid with a very high terpenes potential and an incredible flavour that turns your taste buds upside down. It is a cross between a father of The Menthol genetic line, one o [. ]

  • (Product sold out) 132.00€

Tiger Cake – Compound Genetics

Alchimia presents Tiger Cake from Compound Genetics seed bank, a poly-hybrid cannabis plant of great qualities between Layer Cake (Wedding Cake x (GMO x TK Skunk)) x The Menthol. Tiger Cake shows a vigorous development which is easy to manage by pru [. ]

Basic nomenclature of cannabis genetics

Often, when it’s time to buy cannabis seeds, the beginner grower can quickly become confused by some of the acronyms that are written next to the name of the variety. Simply by learning some basic concepts you’ll be able to make the correct choice between seeds with the same name, but different acronym.

There is a big difference between acquiring a second filial generation (F2) or an IBL, even if we talk about seeds of the same variety. These differences will condition the growth pattern of the plants, and also the final product, so that it is almost essential to learn exactly what is the meaning of these acronyms to be more accurate in choosing which seeds to buy, saving ourselves deceptions and getting closer to our preferences.

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Pure varieties

Also known as landraces or purebreds, pure cannabis varieties have been the basis of cannabis breeding over the past decades. These species are endemic to a geographical area, where they have developed without having been crossed (hybridised) with other varieties. There are a large number of landraces from all around the planet, belonging to any of the three families of cannabis, C. sativa, C. indica and C. afghanica. Nepal is a good example; in this country different pure cannabis varieties (mostly narrow-leaved mixed use varieties) are grown and you can easily see the differences between genotypes based on the height above sea level at which they are cultivated.

Each variety expresses its genetic code (genotype) with a certain growth and flowering pattern (phenotype), so that pure varieties – with a purest genotype – show great uniformity, with just a few slight differences between phenotypes. We can expect very little variation between landrace specimens of the same variety, giving plants with very similar growth, organoleptic and psychoactive traits. Good examples of these varieties can be Hindu Kush (Sensi Seeds), Colombia Punto Rojo (Cannabiogen) or China Yunnan (Ace Seeds).

IBL or stabilized cannabis hybrids

The IBL acronym (in-bred line), means that the cross was made using plants with almost identical genotype (inbreeding). On the contray, outbreeding is employed to introduce new genes into the variety. Although it happens naturally, self-pollination is a common technique used by breeders to fix desirable traits and thus stabilise the genetic line, either with landraces or hybrids. In cannabis genetics IBL seeds should present a highly uniform growth. Classic IBL examples are Skunk and Northern Lights (Sensi Seeds) or White Widow (Greenhouse). There is a lot of work behind IBL’s like these, as a large population of pure specimens had to be used to select the correct parents. In addition, the breeder must fight against inbreeding depression, the result of crossing parents with very similar genetic information. The reward for this job made properly is a highly stable seed variety.

If we make a cross between two different landrace or IBL lines (parental A and B) with different genotypes, the resulting offspring will be the F1 hybrid, the first filial generation from the cross of the phenotype #1 (Parent A) with the phenotype #2 (Parent B). Commonly in this kind of crosses we will observe a very uniform offspring, depending on how stable the parents are, of course. The F1 hybrid between two pure varieties or IBL’s will show the so-called hybrid vigour – also known as heterosis or outbreeding enhancement – introducing new genes that will produce “better” specimens.

Varieties like Orient Express (Ace Seeds), Red Afro (Tropical Seeds) or Eddy from Original Delicatessen would be good examples of true F1 hybrid. Thus, we refer to the first filial generation of any cross as an F1, while the term “F1 hybrid” is used when the parents are different landrace or IBLs.

How to create a polyhybrid

When we cross two F1 individuals (whether landraces, hybrid or polyhybrid varieties), we obtain the second filial generation or F2, and so on with next generations, F3, F4, etc. The second filial generation often gives a more heterogeneous offspring than the F1; we can expect 25% to resemble parent A, 25% to resemble parent B and 50% will be a mixed expression of traits from both parents. As a consequence the stabilisation work must continue generation after generation ( F3, F4, F5…) until we find the generation that gives a uniform offspring with the traits that we are seeking.

Many of the seeds that we can find in shops are polyhybrids, crosses between different hybrids. The offspring of such crosses are in many cases quite unstable, producing plants with very different traits. Keep in mind that in these cases, the genetic mix is very varied, so we can not expect polyhybrid offspring to be as homogenous as an F1 hybrid. It’s easy to imagine how complex it can be to stabilise a cross, since we are mixing different genes from different varieties, which makes the selection and stabilisation process of the different traits a very hard work. The vast majority of hybrids on the market are in fact polyhybrids, like the White Russian (Serious Seeds) or Fruity Jack / Jack el Frutero (Philosopher Seeds).

BX or Backcross

Backcrossing is a common technique used by breeders to fix certain traits. This is done by crossing one of the progeny (F1, F2…) with one of the original parents (recurrent parent) which has the desired trait. To have an even more stable expression of the desirable trait, you can cross the BX1 again with the recurrent parent to have a BX2 (squaring) and so on with BX3 (cubing), BX4, BX5.

This technique is also used to replicate clones in seed form. It is done by choosing a male parent to cross with the clone only, backcrossing it as many times as needed to get an offspring as similar as possible to the original clone. The Apollo 13Bx (TGA Subcool) is an excellent example of this technique.

Tropimango by Philosopher Seeds

S1, feminised cannabis seeds

The acronym S1 refers to the first filial generation produced as a result of crossing the plant with itself. This is achieved by a range of techniques aimed at reversing the sex of the selected female plant, getting it to produce male pollen and using it to pollinate itself. If it’s done properly, we get feminised offspring with the same genotype of the parent used.

As always in genetics, the more stable the parent is, the more stable the offspring will be. This technique can also be used as a regular backcross, selecting and fixing traits but starting with just one parent. Thus, we can find S2 or S3 seeds, which have been backcrossed again with the original parent. Examples of S1 are Tropimango (Philosopher Seeds), S.A.D. (Sweet Seeds) or Trainweck (Greenhouse).

The articles published by Alchimiaweb, S.L. are reserved for adult clients only. We would like to remind our customers that cannabis seeds are not listed in the European Community catalogue. They are products intended for genetic conservation and collecting, in no case for cultivation. In some countries it is strictly forbidden to germinate cannabis seeds, other than those authorised by the European Union. We recommend our customers not to infringe the law in any way, we are not responsible for their use.