How do I prepare agar from the pre-mix?

Hydrate the powder per the ratio on the package (typically 20 to 40 grams per liter of water depending on formulation). Stir, transfer to pressure-cooker-safe jars or flasks, and sterilize at 15 PSI for 30 to 45 minutes. Let cool until the jar is hand-warm but still liquid, then pour into petri dishes in a clean environment. Plates set within an hour. Refrigerate sealed plates once set; use as soon as possible.

Agar Media

Q: PDA or MEA - which formulation should I use?

PDA (potato dextrose agar) is the all-purpose default - works well across most mushroom species and a safe first choice for building an agar workflow. MEA (malt extract agar) has a slightly richer sugar profile that favors oyster varieties and certain wood-loving fungi, often pushing them faster than PDA. Starting out, use PDA. Once you know which species you're working with, MEA may give a speed advantage on certain genera.

Q: Pre-poured plates vs pre-mix powder - which path?

Pre-poured plates are the fast path - unbox, refrigerate, use. No pressure cooker, no flow hood needed for the pour. Best for cultivators starting agar work or running low volume. Pre-mix powder drops the per-plate cost dramatically once you're pouring 20+ plates at a time. The trade-off: needs a pressure cooker for sterilization and a clean pour environment. Most cultivators start with pre-poured and graduate to powder once volume justifies the workflow.

Q: Do I need a flow hood for agar work?

For pouring your own plates from pre-mix, yes - a laminar flow hood or still air box is strongly recommended, since agar is an open medium susceptible to airborne contamination during the pour. For using pre-poured plates, a clean work surface and standard sanitation are sufficient - the plates arrive sealed and sterile, and inoculation only needs a sanitized scalpel or agar punch through a briefly-opened lid.

Mycology-Supply • Agar Media

Agar Media — PDA & MEA

Pre-poured petri dishes and DIY pre-mix powder. PDA (potato dextrose agar) and MEA (malt extract agar) — the two standard formulations for selecting strains, cloning fresh fruits, and building a culture library.

🧫 PDA + MEA 📦 Pre-poured + powder 🔬 Lab-prepared in CA 🏷️ 10/20/40 plate cases

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Agar media — PDA and MEA pre-poured petri dishes and pre-mix powder for mushroom culture work

PDA + MEA

12 SKUs

In stock

2 Forms

Pre-poured + powder

2 Formulations

PDA + MEA

3 Sizes

10 / 20 / 40 plate cases

Mushroom culture work runs on agar. Pre-poured plates ship ready to inoculate — refrigerate on receipt, use as soon as possible. Pre-mix powder hydrates, sterilizes at 15 PSI for 30–45 minutes, and pours into your own petri dishes for a lower per-plate cost once volume justifies the workflow. PDA is the all-purpose default for most species; MEA's slightly richer sugar profile favors oyster varieties and certain wood-loving fungi. Both formulations, both paths, all lab-prepared in California.

Quick Answers

PDA (potato dextrose agar) is the all-purpose default — works well across most mushroom species and a safe first choice for building an agar workflow. MEA (malt extract agar) has a slightly richer sugar profile that favors oyster varieties and certain wood-loving fungi, often pushing them faster than PDA. Starting out, use PDA. Once you know which species you're working with, MEA may give a speed advantage on certain genera.

Pre-poured plates are the fast path — unbox, refrigerate, use. No pressure cooker, no flow hood needed for the pour. Best for cultivators starting agar work or running low volume. Pre-mix powder drops the per-plate cost dramatically once you're pouring 20+ plates at a time. The trade-off: needs a pressure cooker for sterilization and a clean pour environment (flow hood or still air box). Most cultivators start with pre-poured and graduate to powder once volume justifies the workflow.

Hydrate the powder per the ratio on the package (typically 20–40 grams per liter of water depending on formulation). Stir, transfer to pressure-cooker-safe jars or flasks, and sterilize at 15 PSI for 30–45 minutes. Let cool until the jar is hand-warm but still liquid, then pour into petri dishes in a clean environment. Plates set within an hour. Refrigerate sealed plates once set; use as soon as possible.

For pouring your own plates from pre-mix, yes — a laminar flow hood or still air box is strongly recommended, since agar is an open medium susceptible to airborne contamination during the pour. For using pre-poured plates, a clean work surface and standard sanitation are sufficient — the plates arrive sealed and sterile, and inoculation only needs a sanitized scalpel or agar punch through a briefly-opened lid.