Psilocybe cubensis Yellow Umbo 100% Mycelium Grow Kit

Yellow Umbo represents a milestone in modern mycology. This documented hybrid was developed by Yoshi Amano in collaboration with Kilor Diamond, combining the genetics of Psilocybe cubensis “Jack Frost” and Psilocybe natalensis (recently reclassified as Psilocybe ochraceocentrata).

Available within our mushroom grow kits category, this product belongs to our exclusive selection of hybrid strains. The 100% mycelium format ensures a fully colonized substrate, ready to initiate fruiting under controlled conditions.

Among advanced mushroom kits, Yellow Umbo stands out for its genetic stability, dense mycelial structure and consistent performance in indoor cultivation environments.

Morphological characteristics

• Cap: Medium to small size with a pronounced umbo (distinct central elevation).
• Coloration: Yellowish flesh tones, giving the strain its name.
• Stems: Unusual morphology partially inherited from the Jack Frost lineage.
• Mycelium: Fast colonization and vigorous growth pattern.

Recommended growing conditions

• Colonization: 23–25 °C (73–77 °F)
• Fruiting: 21–24 °C (70–75 °F)
• Humidity: 90–95 %
• Ventilation: Consistent fresh air exchange without direct drafts
• Light: Indirect, soft light
• Difficulty: Medium (recommended for growers with basic experience)

Hybrid genetic profile

• Documented interspecies cross
• Strong indoor cultivation stability
• Rapid primordia formation
• Consistent flush development under optimal parameters

Yellow Umbo within hybrid mushroom grow kits

Within the world of hybrid mushroom grow kits, Yellow Umbo is positioned as an advanced experimental strain. Its interspecies genetics provide distinctive morphological traits and vigorous mycelial behavior, making it highly attractive for collectors and ethnobotanical study purposes.

Edabea quality commitment

• 100% fully colonized mycelium
• Carefully selected and stabilized genetics
• Discreet shipping and secure payment
• Real-time stock availability

To learn more about mushroom grow kits, hybrid genetics and cultivation techniques, visit our specialized mushrooms blog.

FAQ – Yellow Umbo 100% Mycelium Kit

What is Yellow Umbo?

Yellow Umbo is a documented hybrid between Psilocybe cubensis “Jack Frost” and Psilocybe natalensis, known for its vigorous growth and distinctive morphology.

Is it suitable for beginners?

It has a medium difficulty level and is recommended for users with basic experience handling 100% mycelium mushroom kits.

How long does it take to fruit?

Under optimal conditions, primordia typically appear within 2–3 weeks after initiating the fruiting phase.

How should the kit be stored?

If not activated immediately, it should be stored in a refrigerator and kept under recommended environmental conditions.

Is it legal to purchase mushroom grow kits?

Regulations vary by country. This product is sold strictly for collection and ethnobotanical research purposes. Customers are responsible for checking local laws.