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Strain family · Jack Frost

Jack Frost spores and crosses

A leucistic line that has been crossed more than almost any other, and the family tree that resulted.

Jack Frost is a leucistic line descended from the True Albino Teacher group, and it has become one of the most crossed genetics in the species. That popularity is exactly why the name alone is not very informative any more: a great many things are sold as Jack Frost, and they are not all the same line.

What this page gives you is the family laid out properly, with each cross named and each parent documented where we know it. Leucistic means reduced pigmentation rather than none at all, which on a slide shows up as a noticeably paler spore than a standard cubensis, and on paper as a lighter print.

13 catalogued · 1 available now
Toque x Jack Frost - Spore SyringeISO
Cubensis · Spore Syringe

Toque x Jack Frost - Spore Syringe

£20 /ea
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Auric Stew - (Bifrost x Blue Ravioli ) Spore SyringeRestocking
Brain Frost iso Spore Syringe 10mlISORestocking
Cubensis · Spore Syringe

Brain Frost iso Spore Syringe 10ml

£20 /ea
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Frosty Pearlz 393 (Jack Frost x Pearly Gates) Spore SyringeRestocking
Frosty Pearlz 393 (Jack Frost x Pearly Gates) Spore SyringeRestocking
Jack Frost 324 - 10cc Spore SyringeRestocking
Cubensis · Spore Syringe

Jack Frost 324 - 10cc Spore Syringe

£20 /ea
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Jack Frost Spore Syringe 10mlRestocking
Cubensis · Spore Syringe

Jack Frost Spore Syringe 10ml

£20 /ea
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Jack Frost x Mayahuel Spore SyringeRestocking
Cubensis · Spore Syringe

Jack Frost x Mayahuel Spore Syringe

£20 /ea
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King Cold (Jack Frost x Thrasher) iso  Spore Syringe 10mlISORestocking
Lord Frieza (Sv-10 x Jack Frost) iso  Spore Syringe 10mlISORestocking
Oaxacan Frost (Jack Frost x Maria Sabina) Spore SyringeRestocking
Shredder (Jack Frost x Mayahuel) Spore SyringeRestocking
Shredder 173 Spore Syringe 10mlRestocking
Cubensis · Spore Syringe

Shredder 173 Spore Syringe 10ml

£20 /ea
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The crosses

The library carries Jack Frost itself alongside a run of documented crosses: King Cold pairs it with Thrasher, Lord Frieza with SV-10, Frosty Pearlz with Pearly Gates, and Oaxacan Frost with Maria Sabina. Each is listed with both parents.

Our lineage explorer maps these relationships visually, which is a quicker way to understand the group than reading a list of names.

Common questions

Frequently asked

What is the Jack Frost strain?
Jack Frost is a leucistic Psilocybe cubensis line descended from the True Albino Teacher group. Leucistic means reduced pigmentation rather than a complete absence of it.
What is the difference between leucistic and albino?
Albino means a complete absence of pigment; leucistic means reduced but not absent pigment. On a spore print the difference is visible: albino lines print very pale, leucistic lines print somewhere between that and a standard dark purple-brown.
Are Jack Frost spores legal in the UK?
Yes, for microscopy and research. Spores are not controlled under the Misuse of Drugs Act 1971 because they contain neither psilocybin nor psilocin.
Keep reading
Microscopy use only. Everything in the MycoWorld library is supplied strictly for microscopy, taxonomy, research and educational study. We do not supply cultivation equipment and we do not provide cultivation guidance. You must be 18 or over. Read the UK law guide.