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Red Boy — Spore Vial 10ml

Red Boy is a rare collector’s cubensis spore vial with striking mahogany caps — easy to grow, medium-to-high yields, and visually unlike any other strain in the catalogue.

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€17.50
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The strain that stands out before it even fruits

Red Boy is one of the more unusual entries in the cubensis catalogue: a strain whose origin remains disputed — possibly a Mexican-derived isolate, though no definitive documentation exists — but whose visual identity is immediately recognisable. Named for the distinctive reddish-brown colouration of its caps, Red Boy entered the community as a collector’s curiosity and has maintained that status over the years. Its relative rarity compared to mainstream strains makes it a rewarding find for growers interested in genetic diversity rather than purely commercial performance.

Dark, mahogany caps — unlike anything else in the catalogue

Red Boy’s most striking feature is its cap colour: a deep reddish-brown to mahogany that sits at the darkest end of the cubensis spectrum. While most cubensis strains present caramel or golden-brown tones, Red Boy’s caps have a distinctly wine-dark character that makes them immediately identifiable in the fruiting chamber. Stems are proportionate and white, bruising a strong blue when handled. Spore prints are deep purple-brown and often voluminous — Red Boy is notably spore-dense.

A balanced reputation with collector appeal

Community reports describe Red Boy as a well-balanced cubensis variety — not commonly listed among the strongest strains, but consistent in character and with a warm, manageable reputation anecdotally. The strain’s collector status means it attracts growers who value the experience of working with unusual genetics as much as the yield outcome. As with all cubensis varieties, growing conditions, substrate, and harvest timing determine the practical result.

Easy to grow, uncommonly beautiful to harvest

Red Boy is rated easy in difficulty and colonises at a medium pace on standard grain substrates. Fruiting initiates at typical cubensis temperatures (22–25 °C) with reliable humidity. Yields are medium to high across two to three productive flushes. The real payoff for Red Boy is the harvest itself — those distinctive dark caps in a tray are a genuinely unusual sight that makes the grow memorable regardless of the result.

Red Boy at a glance

StrainRed Boy
OriginUnknown / disputed — possibly a Mexican-derived isolate, named for its reddish caps
DifficultyEasy
Colonisation speedMedium
Yield ratingMedium to high
Cap colourDistinctive reddish-brown to mahogany — among the darkest in the catalogue
BruisingStrong blue
Notable traitVisually striking dark red caps; uncommon enough to be a collector’s strain

About Psilocybe cubensis vials

Every spore vial in our catalogue contains a single, isolated Psilocybe cubensis strain in a sterile preservation fluid. Cubensis is the most widely cultivated species in the genus, with shared growing parameters across most strains — the differences between strains are mostly visual, behavioural and in subtle yields. The technical specs below apply to every cubensis vial we ship; the strain-specific traits are listed in the table on each product page.

Species Psilocybe cubensis
Vial volume 10 ml
Fruiting temperature 21–24 °C (70–75 °F)
Optimal humidity 90–95%
Compatible substrates BRF cakes, grain, manure-based, coir-based
Time to first harvest ~30–45 days (varies per strain)
Typical flushes 3–5
Spore print colour Dark purple-brown
Shelf life Up to 2 years refrigerated (2–8 °C)

Contents

  • 1× glass vial with 10 ml sterile spore solution
  • 1× sterile 10 ml syringe
  • 2× alcohol prep pads (“alco preps”)
  • Carton box, sealed for shipping

Why choose a spore vial?

  • Long shelf life. Up to 2 years refrigerated — significantly longer than a typical spore syringe.
  • No static charge. Glass vials don’t carry static, so spores stay in suspension and don’t cling to the inside walls. You actually get to use 100% of the spores.
  • Higher spore density. Roughly 1,000 spore grow-parts per millilitre — about double a standard syringe.
  • Resealable septum. The rubber membrane re-seals after each needle pass, so one vial inoculates multiple substrates over time.
  • Compatible with liquid culture media. Vial spore solution is clean for use with LC growth media, where syringes often aren’t.

Practical use

A 10 ml spore vial holds enough solution to inoculate roughly 3 litres of substrate (around 3 ml per litre). Always sterilise the rubber septum with an alcohol prep before inserting a needle, and replace the protective stopper cap between uses. The vial can be drawn from multiple times as long as the septum is sterilised before each pass.

Best practice: transfer to agar or liquid culture first. For the most reliable results, don’t inject spore solution directly into grain. Spores need to germinate before they can colonise, and grain offers no way to spot contamination early. Transferring to an agar plate or to a liquid culture (LC) medium first lets you isolate clean, vigorous mycelium before it ever touches your final substrate. This step typically increases success rates significantly and lets you produce multiple grain bags from a single vial via LC.

Want a full step-by-step walkthrough on inoculating, storing and reusing your spore vial?

View spore vial instructions

Storage

Store the vial in the refrigerator between 2 °C and 8 °C (35–46 °F), dark and upright. Keep the protective septa stopper cap in place when not in use. Do not freeze — ice crystal formation can rupture spores. Stored correctly, a spore vial remains usable for up to 2 years from dispatch. If the solution shows green, pink or orange tints, contamination has set in and the vial should be discarded; faint brownish cloudiness is normal and represents the spores themselves.

A note on legality

Psilocybe spores themselves contain no psilocybin and are legal to possess in most EU countries. Local laws on cultivation and possession of mature mushrooms vary — please check the regulations in your country before going further.

Additional Info
Additional Info
Productcode MCS.SPVIA.002-RBOY-10
Weight (KG) 0.1000
Form Vial
Contents (ml) 10ml
Mushroom Strain Red Boy
Species Psilocybe cubensis
Potency No
Difficulty No
Origin United States

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Good Review by DrownedDuck
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Gut verpackt und von Qualität, Sporen Konzentration sehr gut. Zur spritze kann ich nichts sagen da ich es ohne bestellt habe. (Posted on 4/29/2022)

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