What Is Sinsemilla? The Story of Seedless Weed

What is sinsemilla?

Sinsemilla is simply seedless cannabis: buds from female plants that were never pollinated, so they put their energy into resin and bigger flowers instead of seeds. Surprisingly few people seem to know what it really means. One school of thought says it refers to high-quality seedless weed grown with extreme care. Others think sinsemilla is a family of potent strains from the American Southwest or from Amsterdam.

In reality, sinsemilla isn't a specific cannabis strain. The word comes from two Spanish words: 'sin' (without) and 'semilla' (seed). As obvious as it sounds, sinsemilla just means weed without seeds.

A little cannabis history

People have grown cannabis for at least 12,000 years, and it was legal for most of its history before Western countries banned it in the 20th century. As a result, very few people risked growing weed in North America and Europe until the 1960s.

Most of the weed smuggled into Europe and North America came from India, Pakistan, Mexico, Thailand, Colombia and Jamaica, and the vast majority was full of seeds, which made it harsh to smoke and relatively low in THC.

Seedless weed only really caught on in the 1970s. Growers realized that sinsemilla was noticeably better quality, and therefore more profitable. 

From then on, sinsemilla came to mean more than just high-THC weed. In the '70s, sinsemilla described a growing method. Growers kept the female plant's flowers from coming into contact with pollen from a male plant, ruling out fertilization and seed development on the females.

The reason: unfertilized female flowers are loaded with resin and grow bigger bud clusters. Growers were thrilled to find that sinsemilla had at least twice as much THC as fertilized plants, by their estimates.

Fun fact: many growers say hydroponic sinsemilla tends to test higher in THC than soil-grown cannabis. Hardly anyone tries to grow sinsemilla outdoors, because the risk of pollination from male plants is too high.

Today's cannabis users are a little spoiled by the combo of easy access and top-shelf buds. Previous generations had to make do with low-quality smuggled weed, while today, depending on the laws where you live, you may be able to buy it at a dispensary or a shop, or get a permit to grow it at home.

The jump in quality comes mostly from legalization and availability. But growers around the world have also learned more effective, efficient growing techniques along the way.

These days high-THC strains are everywhere, so choosing what to grow or buy is mostly about finding the aroma, flavor and properties that fit each person's needs. 

As we said, in simple terms, sinsemilla is seedless weed. It's much more potent than seeded cannabis and gives you a much smoother smoke. For those reasons, and to avoid getting pollinated by male plants, practically every sinsemilla grower today grows indoors. Sinsemilla is more than just a bud without seeds: it's cannabis that gives you potent, strong, resin-packed buds.

The term sinsemilla has mostly fallen out of use since feminized seeds, bred to produce only female plants, hit the market in the 1990s.

How do you grow seedless buds?

If you want to grow seedless weed, there are a few ways to go about it. One is to grow feminized cannabis plants from feminized seeds. These seeds are bred (not genetically modified) to produce female plants, so with no males in the garden, your buds shouldn't end up seeded.

Another key is keeping your buds pollen-free right up to harvest. Seeds only form when a female's flowers get pollinated, so check your plants regularly for males or hermaphrodites (plants with both male and female flowers) and pull them before they release pollen. Stress can push a plant to go hermie, so a stable environment means fewer surprise seeds.

If you do find a few seeds in your buds, you can plant them and grow new weed plants. Just keep in mind that the quality and traits of the resulting plants can vary, since they depend on the parents involved. If you're after high-quality plants with specific traits, it's best to buy good cannabis seeds from an online growshop or a specialty store.

Are cannabis seeds worth it?

Growers and cannabis fans value seeds highly because they're the starting point for growing and breeding plants. Good-quality cannabis seeds can be excellent, and they come with several advantages. First, they come from plants with carefully selected, stabilized genetics, which means they have the potential to produce high-quality plants, with traits like higher potency, specific flavors and aromas, and desirable terpene profiles. Seeds also let growers pick and experiment with different strains, which widens the options and keeps diversity alive in the garden. They also make it possible to grow feminized plants, which are female only and keep seeds out of your buds. Consumers especially appreciate that, since seedless buds give a smoother, more consistent smoke. That said, seed quality varies. It's best to buy from trusted, well-known seed banks so you get reliable genetics and the results you're after.

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