Growkit McKennaii

Growkit McKennaii is a complete research-grade kit containing a fully colonised substrate with mature mycelium. The growbox itself does not contain any illegal substances and is intended strictly for microscopy, taxonomic comparison, laboratory observation, and collector purposes. This kit is not designed for cultivation. Growing psilocybin mushrooms remains illegal in Poland and in many other countries, and we strongly advise adhering to all local regulations.

By purchasing this growkit, you confirm that it will not be used unlawfully or for the formation of fruiting bodies. Misuse of the product is the sole responsibility of the buyer. Before ordering, always verify the legal status of Psilocybe materials within your country or jurisdiction.

How to Store the McKennaii Growkit

All growkits are kept in controlled refrigeration at 2–5°C. Under proper cold-chain conditions the manufacturer guarantees freshness for up to 6 months. After receiving your delivery, place the kit in the refrigerator immediately. For optimal results, microscopy or laboratory research should begin within 72 hours. More information here: How to store a growkit.

What’s Included

• Cardboard packaging
• Growbox with mature mycelium — 1200 ml
• Filtered perforated growbag
• Clips

Note: Printed cultivation instructions are not included due to legal regulations. If you live in a country where cultivation is permitted, refer to our educational guide: Growkit Instruction.

Characteristics of the McKennaii Strain

The McKennaii strain is widely regarded as one of the more visually complex and intense Psilocybe cubensis varieties observed in legal research settings. Under the microscope, researchers often report:

• dark brown, smooth cap pigmentation,
• dense and fibrous rhizomorphic structures,
• sturdy early-stage stem formation,
• highly expressive morphological patterns.

This strain is named in honour of Terence McKenna, an influential ethnobotanist, author, and philosopher known for his exploration of altered states and plant traditions. Due to its complexity, McKennaii is generally recommended for experienced researchers.

Variety

Psilocybe cubensis — McKennaii

History of the McKennaii Strain

The exact genetic origin of McKennaii remains partially undocumented, but its popularity rose alongside the works of Terence McKenna, whose books such as The Archaic Revival and Food of the Gods influenced modern psychedelic research. McKennaii has become one of the most recognisable strains in legal mycology circles. For additional context on safe research and post-experience frameworks, visit: psychedelic integration.

Is Cultivation Allowed?

In Poland — and in many EU countries — cultivation of psilocybin-producing mushrooms is illegal. We do not promote or support cultivation. If you live in a country where cultivation is permitted, see our educational guide: Growkit Instruction.

Microscopy Observations

In regions where research is allowed, McKennaii is described as a strain with:

• strong visual density under magnification,
• interesting cap–stem formation ratios,
• expressive hyphal networks,
• distinctive rhizomorphic spread patterns.

This makes it a popular choice for comparative analysis and advanced microscopy work. For safe-context educational materials, see: trip preparation & safety.

McKennaii Growkit — FAQ