B+ Spores

B+ spores sold for the purposes of microscopic study. Each syringe is prepared in front of a laminar flow hood under strict laboratory conditions. Spores legally produced in Jamaica.

What does your order contain:

BD™ Safety-Lok™ syringe containing B+ spores suspended in either 3ml or 10ml of distilled and sterilised H2O
18g x 1.5inch BD™ microlance needle
70% isopropyl alcohol swab

Legal Disclaimer

It is illegal to cultivate these spores in the UK. If you make it known that you intend to use this item for cultivation you will be banned from the website and subsequent purchases will be cancelled. You must be 18 years of age to purchase this item.



The story goes that the B+ strain was invented by Mr. G (summer heights high anyone?). A legendary mushroom cultivator, he is also credited with A-strain, Albino Treasure Coast, among others. B+ is one of the most popular commercial Cubensis variants in history. It has been heavily domesticated over decades of generational manipulation. Mr. G claims it is a hybrid of Psilocybe Cubensis and Psilocybe Azurescens. This claim has been widely discredited as there is no evidence that such a hybrid is possible. The claim is more likely to be a marketing ploy.

Another interesting point with B+ is that the strain is pronounced "B Positive", not "B Plus". B+ are known to be very resilient and grow quite large in the wild.

To further the B+ mystery, for a time, Sporeworks accidentally sold a different variety (the prime suspect is PES Amazonian) under the B+ label. This mistake has since been corrected, but there may be several different 'strains' floating around the trade community under the name B+.

Genus: Psilocybe
Species: Cubensis
Variety: B+
Spores: Dark purplish brown
Habitat: Bovine, Equine Dung and Enriched Soils
Climate: Subtropical
Cap: 25-75 mm in diameter, hemispheric to convex expanding to broadly convex to nearly plane with age
Stem: 100-150+ mm in length.
Gills: Attachment adnate to adnexed. Grayish coloration in young fruit bodies becoming nearly black in maturity.

How do I store B+ spores?

Spores should be stored in a cool, dark and dry environment. You can also store spores in the fridge (just make sure the syringe is in a clean zip-lock bag such as the packaging the spores are sent in).

Can I freeze my B+ spore syringe?

DO NOT allow spores to freeze. This is not as you would rightly be guessing that it is a bummer to have to wait for your syringe to defrost before being able to view the spores under the microscope. The issue is that the spore cells will burst as the water expands on freezing.

How long can I keep my B+ spore syringe before using?

Spore syringes should be ideally used as soon as possible. If stored correctly the spores will be fine for 6 months. The longer you leave the spore syringe the more chance of contamination being present when viewing under the microscope.

Can I reuse a spore syringe if I have some spore solution left?

Yes! The best thing to do is leave the needle on and flame sterilise before storing with the needle cover put back on. DO NOT remove the needle to put the syringe cap back on as this will allow an opportunity for contamination to occur. When you come to use your spore syringe again please flame sterilise again before pushing a small amount of the spore solution out of the needle. You are now able to carry on your microscopic studies.

How do I get my syringe ready for the microscope?

The aim of the game when viewing spores under the microscope is cleanliness. This means 1) you need to be as clean as possible, 2) your environment needs to be as clean as possible and 3) your equipment needs to be as clean as possible.

For you to be as clean as possible have a shower, wear clean clothes, and give your hands a good clean with 70% isopropyl aclohol (or where sterile gloves).

To work in a clean environment ideally you will be using a Still Air Box or a flow hood. If you do not have access to these then the next best thing is to work in a clean and draft free room. We are trying to eliminate as much as possible the chance of something landing on your slide other than your selected spores.

Give your equipment a good clean with 70% isopropyl alcohol as well. At this point we are ready to re-clean our hands with the alcohol wipe, remove the syringe cap and attach the supplied sterile needle ready for use.

How do I view my B+ spores under the microscope?

Please see instructions below.

Can I purchase B+ spores in print form?

Yes you can purchase this here.

Legal Information

It is currently illegal to cultivate Psilocybe Cubensis spores in the UK and many parts of the world. To learn more about the legality of Psilocybe Cubensis spore syringes please read Are Spore Syringes Legal?.
make one here) or a flow hood. If you do not have access to these then the next best thing is to work in a clean and draft free room. We are trying to eliminate as much as possible the chance of something landing on your slide other than your selected spores.


We recommend viewing mushroom spores at a minimum of x400 magnification using a microscope. Learn more about the process of viewing spores under a microscope by reading this abbreviated excerpt, taken from the book “Fascinated by Fungi”, written by Pat O’Reilly. The book can be purchased from Amazon.


Customer Reviews

Based on 10 reviews
Andy Thelwell

I inoculated 3 UB rice packs. None took. I appreciate UB rice can be a bit hit and miss.

Anthony keith
1st time ordering

This was my 1st time ordering spores and it wont be my last. I was shocked when my parcel arrived the day after ordering. Very happy

Phillip Baker
Service good so far.

A bit early to tell whether the rest of the process will be successful

Rayan Phillips
B+ spores

No mycelium growth yet inoculated on 30/01

Psychonaut jack

Quickly arrived & ready to study!

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