Twenty20 Mendocino: Feminized Cannabis Seeds

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Feminized Cannabis Seeds

NEW DROP 4/20/26!

Cannabis cultivation concept highlighting autoflowering plants that bloom without changes in the light cycle, with harvest time indicated.

Announcement about full-term photoperiod with details on typical fall harvest time and indoor flowering specifics for cannabis strains.

Hybridized earlies: fast-flowering cannabis varieties suitable for early september harvest and ideal for indoor cultivation.

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NEW DROPS

AVAILABLE APRIL 20, 2026

Project Skunk
Lemon-G
Mendocino Cherries
PineRose
Whipped Lemons
BannanaBread
Early Bubba
Summer Cherries
ZOgreberry
Superwreck V2

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Promotional offer with complimentary seed packets as gifts for every $45 spent, with no purchase limit.

Image showing three bottles of Silver Thiosulfate Solution (STS Spray) by Twenty20. The bottles labeled Part A, Part B, and STS Reversal Spray highlight a new look and 2-part formula.

Twenty20 2025 Catalog

Interest in growing Twenty20 genetics for your farm?

We are excited to work with you so that you can produce the best product for your business.

Get the

Twenty20 Digital Catalog

Check out our new catalog offering a collection of autoflowering, photoperiod and hybridized early cultivars. Be sure to read the stellar article about our phenohunting and teamwork with a family-owned farm in Michigan.

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47730 Woodruff Rd
Laytonville, CA 95540

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LEGAL DISCLAIMER: THIS WEBSITE SHOULD NOT BE VISITED BY ANYONE UNDER THE AGE OF 21! WARNING! GERMINATION OF CANNABIS SEEDS IS ILLEGAL IN MOST COUNTRIES. THESE SEEDS SOLD BY TWENTY20 MENDOCINO ARE AS A COLLECTABLE ADULT SOUVENIR TO HELP PRESERVE THE CANNABIS GENETICS FOR FUTURE GENERATIONS. PLEASE DO NOT ASK QUESTIONS ON HOW TO GROW THESE SEEDS AS UNDER CURRENT LEGISLATION IT IS ILLEGAL TO GROW THEM OR ENCOURAGE THEIR GROWTH THROUGH GIVING ADVICE. ANY INFORMATION ON THE PACKAGING OF THE SEEDS, MARKETING MATERIAL OR WEBSITES, IS GIVEN FOR THE EDUCATIONAL PURPOSE OR PURPOSE OF DIFFERENTIATION. IT IS NOT INTENDED TO CONDONE, PROMOTE OR INCITE THE USE OF ILLEGAL OR CONTROLLED SUBSTANCES. AS A TWENTY20 MENDOCINO CUSTOMER, YOU ARE PROHIBITED FROM DISTRIBUTING SEEDS WE SUPPLY TO COUNTRIES WHERE POSSESSION OF AND/OR TRAFFICKING IN CANNABIS SEEDS OR OTHER SEEDS IS ILLEGAL.

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