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S1 Cannabis Seeds

S1 feminized cannabis seeds are an excellent choice for breeders, cultivators, and collectors alike. These seeds allow growers to preserve rare, clone-only strains and discover new phenotypes of their favorite cultivars.

The term “S1” means “first selfed generation.” Selfing is the process of crossing a plant to itself to make feminized seeds. This can be accomplished by using an ethylene-blocking spray such as colloidal silver to cause the mother plant to form pollen sacs. The pollen is then used to pollinate either the original mother plant or a clone of it.

When done correctly, selfing produces 100 percent feminized marijuana seeds with the same genotype as the mother plant. This allows growers to discover plants that are nearly identical to the original clone. It also serves to open the gene pool, producing rare phenotypes with recessive traits. When growing S1 seeds, you may even find some phenotypes that are better than the original mother.

For breeders, selfing is a quick, easy, and effective way to stabilize a strain. Rather than selectively breeding males and females for many generations, they can create a homozygous strain in just a few generations of selfing.

At Greenpoint Seeds, we offer a variety of S1 cannabis seeds bred from elite, clone-only cultivars such as Animal Cookies, Purple Punch, and Gorilla Glue #4. Shop our feminized S1 seeds today.

Customer Reviews

Phillip Brinkley says:


It's good

2023-02-04 23:24:00 February 04, 2023

Dave says:


Order shipped and received in a timely fashion.

2023-02-03 02:18:40 February 03, 2023

Terry says:


Customer service was excellent, friendly and very helpful, I will definitely be a future customer of green point seeds

2023-02-02 08:30:12 February 02, 2023



Whole garden is Greenpoint

2023-01-31 21:29:11 January 31, 2023

Terence says:


Every seed popped. I ordered from NY growers to see who was better 3 out of 15 popped. I referred my friends to you guys. Y'all are the best.

2023-01-31 16:46:55 January 31, 2023

Michael Barbieri says:


Always great

2023-01-31 16:01:34 January 31, 2023

Charles says:


These are growing like weed lol

2023-01-30 14:37:18 January 30, 2023

Ryan Owen says:


Super fast. Super cheap.

2023-01-29 22:05:46 January 29, 2023

Ryan Owen says:


Fast. Not one complain in over 20 orders.

2023-01-29 21:59:43 January 29, 2023

Jeremy says:


Loved this strain. Very resilient. Great taste. It liked a bit more food than expected! Perfect customer service and time frame

2023-01-27 18:48:44 January 27, 2023

Lance Mehuren says:


Wicked fast delivery Amazing strains

2023-01-27 13:30:18 January 27, 2023

Nevaeh says:


Website was very easy to navigate. Customer service was nice and the delivery was discreet and quick.

2023-01-24 17:41:02 January 24, 2023

Lord Michael Skinner says:



2023-01-24 12:14:41 January 24, 2023

Donald L. says:


Easy to order, fast delivery, germination rate high. Chance of finding something you like 100%

2023-01-23 16:00:18 January 23, 2023

Craig Havens says:


I never have an issue with anything I purchase from Greenpoint, Never!, That's why they are Number one in my book. Absolutely the Best seed supplier I have ever used.And I thank you for that

2023-01-23 12:16:39 January 23, 2023