End Game Rbx EC#4 by Ethos Genetics

End Game Rbx EC#4 is a boutique-style feminized photoperiod from Ethos Genetics that pairs a heavyweight cookie mother with a reversed End Game selection. The result is a vigorous, high-yielding hybrid wrapped in sour orange, sweet cherry and incense aromas, with a Total Active Cannabinoid (TAC) figure of 30%+ that puts it among the stronger options in the Ethos seeds catalog.

This is a plant for growers who like to shape a canopy. It responds well to topping and training, stretches hard once the lights flip to 12/12, and fills that stretch with extremely dense flowers. Medium-long internodes leave enough room between bud sites for light and air to reach the inner branches, which keeps those tight colas from crowding each other.

Anyone searching for the End Game Rbx EC#4 strain will find a cultivar that is equally at home in a tent, a greenhouse or an outdoor bed, finishing in roughly 63-70 days of bloom with a harvest the breeder rates as high.

Lineage and Breeding: Ethos Cookies #4 Meets End Game

The mother is Ethos Cookies #4, one of the house cookie keepers that Ethos Genetics has used repeatedly to add resin, bag appeal and complex dessert-and-fuel aromas to its crosses. She was crossed with End Game V1 #5, a selected individual from the End Game program, to build this line.

The Rbx tag stands for reversed backcross. In the Ethos system, a chosen female is reversed so it produces pollen, and that pollen is used to cross back into a related line. The process keeps the seeds feminized while locking in the traits of the parent that is being backcrossed toward. The EC#4 tag in the name simply flags that Ethos Cookies #4 is the cookie parent in this version of End Game Rbx.

Aroma, Flavor and Effect

The terpene profile reads like a candy shop next to a temple. Sour oranges and sweet cherries lead the nose, while sandalwood and incense sit underneath and a sugary candy note rounds things off. Ethos places it in the cherry, orange-grapefruit and gassy terpene families, so expect a faint fuel edge that shows up when the flowers are broken open.

End Game Rbx EC#4 sits in the classic hybrid camp. With TAC up to 30% and beyond, the experience is full-bodied and worth approaching with a measured hand for newer consumers: a bright, fruity head lift paired with a steady body feel that neither races nor sinks.

Growing End Game Rbx EC#4 Indoors and Outdoors

Indoors, top early and spread the branches with LST or a trellis net before the flip. The breeder warns of significant stretch in flower, so leave headroom and flip a little earlier than usual in short tents. Medium to tall plants with medium-long internodes make an even, flat canopy the goal; a good defoliation around day 21 of bloom opens up the lower sites.

Outdoors and in greenhouses, she is described as strong and vigorous. Give her a large container or open ground, stake the main branches as the dense flowers bulk up, and plan for a harvest window that suits a 63-70 day bloom. Ethos lists this one for intermediate and pro growers, mainly because of the stretch and the training it rewards.

End Game Rbx EC#4 Characteristics

Strain type	Feminized photoperiod
Generation	Rbx (reversed backcross)
Genetics	Ethos Cookies #4 x End Game V1 #5
TAC	30%+ (Total Active Cannabinoids)
Effect	Classic hybrid, fruity head lift with a steady body feel
Aroma/Terpenes	Sour oranges, sweet cherries, sandalwood, incense, candy, light gas
Yield	High
Flowering time	63-70 days
Height	Medium to tall, with significant stretch in flower
Grow level	Intermediate to pro
Ideal environment	Indoor, greenhouse and outdoor
Best cultivation technique	Topping, LST and SCROG

FAQ