What is in a spore syringe
A spore syringe contains sterilised water and spores. Nothing is growing inside it. The spores were scraped from a spore print, suspended in water and drawn into the syringe. Held up to the light it looks like clear water with dark specks that settle to the bottom.
Spores are the reproductive cells of the mushroom, and each one is a distinct genetic individual. A multispore syringe holds thousands of them, every one slightly different. That genetic variety is exactly what a microscopist wants to study, and it is why spores are the standard material for taxonomy. Browse the spore syringe category to see how vendors describe species, strain and fill volume.
What is in a liquid culture
A liquid culture, usually shortened to LC, contains living mycelium suspended in a weak sugar broth. The vendor starts it from a clean agar plate, grows it in a sterile jar until the broth is full of white strands, then draws it into syringes. Held up to the light an LC shows visible wisps, clouds or clumps of white mycelium, and the liquid itself is often slightly amber from the sugar.
Because the mycelium is alive and already growing, an LC behaves completely differently from spores. It is a working culture, not a sample for study. The LCs on Culture Cave are gourmet and research species. The liquid culture category and the gourmet cultures category both carry lion's mane, oyster, shiitake and other edible cultures from vendors in several countries.
What each is for
Spore syringes are for microscopy and taxonomy. You put a drop on a slide, add a coverslip, and study spore shape, size and colour at 400x to 1000x. One syringe gives dozens of slides. For Psilocybe species this is the only use the spores are sold for, and every Culture Cave vendor lists them on that basis. Our guide on how to use a spore syringe for microscopy walks through the whole process.
Liquid cultures are for growing gourmet species. A grower injects a few millilitres of LC into sterilised grain, waits for the grain to colonise, then moves the spawn to a bulk substrate or a grow bag. A lab uses LC to keep a known strain alive, to inoculate agar plates, or to scale up from a single plate to many jars. Because the mycelium is already established, LC colonises grain far faster than anything started from scratch. The liquid culture guide covers the gourmet workflow in detail.
You can look at an LC under the microscope too, and it is worth doing once to see hyphae, septa and clamp connections. But it is not what LC is for, and it tells you nothing about spore morphology.
Storage differences
Spores are dormant, so a spore syringe is forgiving. In the fridge at 2 to 8 C with the cap on it keeps for 6 to 12 months and often longer. See how to store spore syringes for the full routine.
LC is alive, which cuts both ways. It keeps growing slowly even in the fridge, using up the sugar in the broth. Most vendors suggest using an LC within one to three months of the date on the label. Older LC can still work but is more likely to have exhausted its food or picked up contamination. An LC should never be frozen, and it should be shaken before use so the mycelium is spread evenly through the syringe.
The two also fail in different ways. A bad spore syringe goes cloudy with bacteria. A bad LC can look fine but smell sour or sweet, which means bacteria or yeast have outgrown the mycelium. If you are unsure, a drop on an agar plate will tell you within a few days whether the culture is clean. The agar plates beginners guide shows what clean and contaminated growth looks like.
Price differences
In general terms a spore syringe is cheaper than a liquid culture of the same volume. A spore syringe is quick to make from a single print. An LC takes a clean agar plate, a sterile broth, a week or more of growth and a contamination check before it can be sold, and the vendor carries the risk of a batch going bad.
Isolated cultures cost more again, because the vendor has selected a single genotype on agar and documented its traits over several generations. The genetics and isolates category is where that work is listed. For the gourmet grower an LC often works out cheaper per jar of grain, because one syringe can inoculate many jars and each jar colonises quickly. Exact prices vary by vendor, species and country. Every listing on Culture Cave shows the vendor's own price with no commission added.
Legality: spores and live cultures are not the same thing
This is the point that catches people out. In many countries the law treats spores of a controlled species differently from living mycelium of the same species. Spores contain none of the controlled compounds. Mycelium and fruiting bodies may. As of 2026, spores of Psilocybe species are sold for microscopy in much of the USA, in the UK and in parts of Europe, while live cultures of those same species are not legal to sell or possess in most of those places.
This is why you will find Psilocybe spore syringes and spore prints on Culture Cave but not Psilocybe liquid cultures. Vendors list LC for gourmet and research species only. The rules vary by country and sometimes by state, and they change. Read our guides on whether mushroom spores are legal in the UK and the USA, and check your local law before ordering. This is not legal advice.
Which should you buy
- You want to look at spores under a microscope: buy a spore syringe. It is cheaper, lasts longer in storage and is the correct material for taxonomy.
- You want to grow oyster, lion's mane or shiitake: buy a liquid culture or an agar plate. LC is faster and simpler for a first grain jar. Agar lets you check the culture before you commit grain to it. See grain spawn and grow bags explained for what comes next.
- You want a documented, consistent gourmet strain: buy an isolate on agar or an isolated LC from a vendor who records the generation and the traits.
- You are starting a lab or a research project: buy agar plates and spore prints. Both store well, and both let you build your own library of cultures and reference slides.
Reading vendor labels: ISO, LC, MS
Vendors use a handful of short codes on listings and labels. Knowing them saves confusion.
- MS means multispore. The syringe or print holds spores from a whole print, so many genetic individuals. This is the standard spore syringe.
- ISO or iso means isolate. A single genotype selected on agar and carried forward. For gourmet species it is sold as an agar plate or LC. Where a spore listing says iso, it means the print came from a documented isolated line. The isolated vs multispore guide covers this fully.
- LC means liquid culture, living mycelium in broth.
- Agar, plate or wedge means a culture on solid agar in a Petri dish, or a slice cut from one.
- F2, F3 and so on are generation numbers showing how many times the vendor has carried the line through selection.
If a listing is unclear, ask the vendor through their storefront before you buy. Every listing shows the vendor's country, shipping regions and real reviews from buyers who have already received the product, and you can compare sellers across the full vendor directory.