Lemon #5

Overview

Lemon #5 is a photoperiod hybrid released by Ethos Genetics, a Colorado-based breeder founded by Colin Gordon ^[1]. It's part of a broader lineup of citrus-leaning cultivars the company has developed and used as breeding stock for later releases. The strain is marketed primarily on its terpene profile — a sharp, candy-like lemon character — rather than on a specific effect claim.

As with almost every modern named cultivar, 'Lemon #5' refers to a seed line, not a genetically uniform clone. Different plants grown from the same pack can vary meaningfully in aroma, potency, and structure Strong evidence.

Chemistry: cannabinoids and terpenes

Cannabinoids. Breeder-reported THC for Lemon #5 sits in the low-to-high 20s percent by dry weight, with negligible CBD ^[1]. These numbers come from the seed bank, not from independent third-party panels, so treat them as marketing figures Weak / limited. Peer-reviewed surveys of commercial cannabis consistently find that advertised THC values run higher than lab-verified values, sometimes by 5-10 absolute percentage points ^[2] Strong evidence.

Terpenes. The dominant terpene is reported as limonene, which is chemically consistent with the pronounced lemon aroma. Secondary terpenes commonly listed include caryophyllene and myrcene, though exact ratios vary by phenotype and grow environment Weak / limited. No published, peer-reviewed terpene panel for Lemon #5 specifically exists as of writing.

A note on folklore: the widely repeated claim that >0.5% myrcene 'makes a strain indica' has no basis in the scientific literature and originated as marketing shorthand No data^[3].

Reported effects

User reports on retailer sites and forums describe Lemon #5 as uplifting, talkative, and energetic, with the citrus terpene profile driving much of the sensory experience Anecdote. These are self-selected reviews with no controls for dose, tolerance, set, or setting.

There are no clinical trials on Lemon #5 specifically, and there are essentially no clinical trials on any named cannabis cultivar as a discrete intervention Strong evidence. Claims that a specific strain treats anxiety, depression, ADHD, or pain are not supported by strain-level evidence ^[4]. What research does support is that THC dose, individual biology, and expectation effects drive most of the acute subjective experience — the strain name is a weak predictor ^[5] Strong evidence.

The indica/sativa/hybrid label similarly does not reliably predict effects; a 2022 chemotype analysis of thousands of commercial samples found the labels have little relationship to actual chemistry ^[6] Strong evidence.

Lineage

Lemon #5's exact parentage is not fully disclosed by Ethos Genetics in publicly available breeder notes, and third-party lineage databases list conflicting or incomplete pedigrees Disputed. It sits in the same general family as other Ethos citrus lines but should not be confused with unrelated lemon-named cultivars from other breeders (e.g., Lemon OG, Lemon Skunk, Super Lemon Haze).

Cannabis lineage claims in general are difficult to verify: most 'pedigrees' rest on breeder statements without genetic confirmation, and genotyping studies have repeatedly shown that strain names on the market are unreliable indicators of underlying genetics ^[7] Strong evidence. Unless you have SNP data on a specific cut, take any lineage tree — including this one — as tentative.

Cultivation basics

Lemon #5 is a photoperiod cultivar with a reported flowering time around 8-9 weeks indoors. Growers describe medium-tall stretch, moderate branching, and a preference for topping or mainlining to open the canopy. Yield is reported by the breeder as above average, though independent verification is not available Anecdote.

General cultivation practices apply: stable VPD control during flower, adequate calcium and magnesium supplementation in soilless media, and finishing with cooler night temperatures to help preserve monoterpenes like limonene, which volatilize readily at high temperatures and during aggressive drying ^[8] Strong evidence. If you want the lemon nose the strain is named for, slow-dry and cure in sealed jars at controlled humidity.

Marketing vs. reality

What's real: Lemon #5 has a distinct, strong lemon-limonene aroma when grown and cured well. It's a legitimate breeder release with a traceable origin at Ethos Genetics.

What's marketing: Precise THC percentages on packaging, promises of specific effects ('focus,' 'creativity,' 'anti-anxiety'), and confident lineage trees. All of these are either unverified, unmeasured, or contradicted by broader evidence about how cannabis is labeled and sold ^[2][6][7] Strong evidence.

If you enjoy citrus-forward flower, Lemon #5 is a reasonable pick. If you're chasing a specific therapeutic outcome, the strain name is not the variable that will get you there — dose, method of consumption, and your own physiology matter far more.

Sources

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