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Pre-Poured Agar Dishes & Slants

From $20.00

(67 customer reviews)

Sterile Petri Dishes

We offer convenient MADE TO ORDER solutions for home growers, in this case, we help remove the hassle from pouring Petri dishes in a still air or glove box, or even for those who are too busy to make their own plates while running a mushroom farm.

We are happy to help with sterile Petri dishes for culture work and slants for long-term storage of mushroom cultures.

Upon receipt feel free to refrigerate, use when ready to get to work!

“..Antibiotics? πŸ€””

Add antibiotics to the dishes/slants in the event you’re working with spores, tissue transfers (cloning mushrooms) or are otherwise concerned about bacterial contaminants. For slants, it can’t hurt to have an added layer of protection, but is not necessary!

NOTE: Don’t use antibiotics as a crutch for poor technique, it will bite you in the ass!


Expect up to 7 days before shipping.

Pre-Pours are NOT individually wrapped, they arrive in 20 packs in sealed gallon zip-locks. If you would like pre-wrapped plates, send us an email for a vendor recommendation!

Some condensate can be expected when conditions outside (during shipping) are not comparable to inside (when you bring the box indoors). To remedy this, after sealing the plates, store them upside down and condensate will dissipate within 1-2 days.

If you’d like to mix your dishes & slants, keep them in increments of 20 & indicate in the ‘Shipping Notes’ on checkout!!



More Details Below!!

Parafilm strips, 1″x4″ – pre-cut and conveniently packaged. Used for sealing culture media to allow gas exchange while keeping things out.

STOP! Monthly & Quarterly Agar Deliveries ARE AVAILABLE!

Yes you read that right! Additional savings on shipping, free parafilm with all orders and dollar plates/slants any time!


While simple at face value, pouring agar can be time-consuming and if not done right, a complete waste of time. That’s where I come in! With years of experience starting from a still air box and working up to a 4×4 flow hood, I love spending time in the lab and doubly so when it feeds my family! I offer pre-poured agar at significant savings to other retailers online, and I like to think my sensible approach helps to encourage others to try agar once they realize it’s not so scary!

Pre-Poured PDA Plates

P(otato) D(extrose) A(gar) (aka PDA) is the current formulation in production. Gentamicin sulfate is the active antibiotic if chosen.

Storage life of pre-poured agar plates depends on how you store them, kept in the bag (or another sealed container) they arrive in & refrigerated they can last for some time. If sealed with parafilm and left out in the open, they will dry within a few months. Slants however are completely sealed and need no special storage considerations other than post inoculation/colonization cold storage is recommended with the health of the culture in mind (other than pink oysters!) this applies to stored Petri dishes though they will still dry out in time if not kept sealed.

Want to learn how to pour your own? See my tools & resources section for links to bulk agar, and the article I wrote on pouring agar for mushrooms to learn how it’s done & learn about a unique agar recipe you probably haven’t heard of!

Do you do a LOT of culture work for mushrooms?

Consider our pre-poured agar subscription service which offers monthly & quarterly (every 3 months) petri dish or slant deliveries. Always $1/ea (aside from antibiotic additives) for subscribers, you also receive discounted flat rate $10 shipping on any quantity ordered as well as complimentary parafilm (or alternative) for each dish.

Additional information

Weight N/A
Dimensions N/A

Slants, Plates


20, 40, 60, 80, 100, 120, 500, 1000


With Antibiotics, Without Antibiotics

67 reviews for Pre-Poured Agar Dishes & Slants

  1. Joseph M. (verified owner)

    Couldn’t be happier with the quality in these dishes! I mean seriously! Within the second day I have growth quicker then I’ve ever had before! Definitely will be returning for more!

    Pre-Poured Agar Dishes & Slants
    Pre-Poured Agar Dishes & Slants
  2. Bernie S. (verified owner)

    Transfered some lions mane to 6 slants and all 6 are already producing some thick lions mane myc. Hope to purchase many more!

    Pre-Poured Agar Dishes & Slants
  3. Richard G. (verified owner)

    So I’m still a new customer here and This was my first time ordering pre-poured plates as opposed to prepping them myself and I must say I’m impressed! I look forward to ordering more fine products. 10/10 would recommend. Thanks MycTyson, you do amazing work!

    Pre-Poured Agar Dishes & Slants

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