Identify and Eliminate Male Plants, Days After Germination

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With DNA-based testing, it is possible to identify male cannabis plants weeks before they show any visual sex features. DNA is extracted from one of the plant’s leaflets, as early as the second set of true leaves. Males can then be removed from a grow in order to maintain female flowers rich in cannabinoids. This method is an improvement over traditional visual inspection because it allows growers to identify male plants earlier, more accurately, and with less labor.

Save Weeks Worth of Resources

It takes approximately 6 weeks for a cannabis plant to show signs of sex. By eliminating male cannabis or hemp plants early, cultivators can make better use of their resources, canopy space, and labor.


It cost approximately $20 to grow a cannabis plant 6 weeks 

Canopy Space

At 6 weeks, 40% of the canopy space will be male 


6 weeks of care requires transplanting, watering, monitoring, training, and removing.  

Two Options for Sex Testing Cannabis

Do it yourself with the youPCR® Plant Screening Platform. The youPCR Gender Detection assay can be performed on-site at your grow for as little at $5 per plant. Using PCR technology, the youPCR Gender Detection assay looks for the Y chromosome in a 4mm leaf biopsy, and when a male is detected, the colorimetric reagent changes from pink to yellow.

Work with a partner lab who will test for you. Cultivators who don’t have enough volume, lab experience, or start-up cash to test seedlings in-house can outsource to one of our partner labs. They have great turnaround time and aren’t going to use your genetic data to fuel a breeding operation.

Available Gender Detection Products

Item # Name Reactions
420112 FemINDICAtor® Plant Gender Detection Assay 200 Buy Now
420312 FemINDICAtor® Positive Control 60 Buy Now
420211 youPCR® Solution B – Gender 50 Buy Now
420211 youPCR® Gender Positive Control 50 Buy Now