Cultivation · Issue 01 · Genesis
What a First Grow Actually Costs in 2026
Three itemised budgets, priced in pounds, dollars and Australian dollars, against the four-hundred-pound starter bundles. Most of what you spend, you spend once.
Two things distort the price of a first grow, and they pull in opposite directions. Between them sits a number almost nobody quotes accurately.
The first distortion is the starter kit. Search for what you need and you will be sold a boxed bundle at £250 to £400 with a photograph of a tub full of mushrooms on the front. Open it and you find a plastic tote, a bag of coir, six jars, a roll of tape and a laminated instruction card. The tote is worth twelve pounds. What you are paying for is the removal of decision-making, and you are paying roughly three hundred percent for it.
The second is forum arithmetic, where somebody explains that they did their whole first grow for thirty quid using jam jars and a saucepan. This is true, and it is also true that the same person did three grows before one worked. Cheap is not the same as economical when the failure rate is the real cost.
The short answer
| Bare minimum | Sensible first grow | The one that pays off | |
|---|---|---|---|
| Total, GBP | £69 | £248 | £355 |
| Total, USD | $88 | $306 | $437 |
| Total, AUD | A$138 | A$506 | A$721 |
| Your second grow | £12 | £14 | £6 |
That last row is the whole article. Almost everything on these lists is equipment, and equipment is a one-off. The number people quote when they warn you that growing is expensive is the first-grow number, and it is the only time you will ever pay it.
Tier one: the £69 grow
Kitchen equipment only. No pressure cooker, no still air box, small scale, and a real chance of losing it. This is the version to build if you want to learn what the stages feel like before committing money.
| Item | GBP | USD | AUD |
|---|---|---|---|
| Culture (spore syringe or print) | £18 | $22 | A$36 |
| Brown rice flour, 1 kg | £2 | $3 | A$4 |
| Vermiculite, 10 L | £8 | $10 | A$16 |
| Coco coir brick, 650 g | £4 | $5 | A$8 |
| Six half-pint jars | £8 | $10 | A$16 |
| Micropore tape | £2 | $3 | A$4 |
| Aluminium foil | £2 | $2 | A$3 |
| 70% isopropyl, 500 ml | £6 | $8 | A$12 |
| Nitrile gloves, box of 100 | £5 | $7 | A$11 |
| FFP2 masks, pack | £4 | $5 | A$8 |
| Clear storage tote, 30 L | £8 | $10 | A$16 |
| Spray bottle | £2 | $3 | A$4 |
| Total | £69 | $88 | A$138 |
This assumes you already own a large lidded stock pot and a hob. If you do not, add £20 / $25 / A$40. What the budget really buys is a lesson: you will steam-sterilise rather than pressure-sterilise, which means a meaningful proportion of jars will fail and you will not always know why. Plenty of people have taken a first grow all the way through on exactly this list. Plenty of others threw three attempts away and bought a pressure cooker anyway, having spent £69 twice on the way.
Tier two: the £248 grow, and the one we would recommend
This is the version that works. It is not luxurious and there is nothing on the list that is there for comfort.
| Item | GBP | USD | AUD |
|---|---|---|---|
| Pressure cooker, 21 to 23 L | £85 | $105 | A$180 |
| Still air box (60 L clear tote) | £13 | $16 | A$26 |
| Monotub (54 L clear tote) | £14 | $18 | A$28 |
| Rye berries or whole oats, 5 kg | £8 | $10 | A$16 |
| Six 1 L jars | £15 | $18 | A$30 |
| Injection port lids, six | £9 | $11 | A$18 |
| Coco coir, 5 kg | £9 | $11 | A$18 |
| Vermiculite, 10 L | £8 | $10 | A$16 |
| Gypsum, 1 kg | £5 | $6 | A$10 |
| Polyfill or filter discs | £5 | $6 | A$10 |
| Hygrometer and thermometer | £8 | $10 | A$16 |
| Heat mat with thermostat | £18 | $22 | A$36 |
| Scalpel and inoculation needle | £8 | $10 | A$16 |
| 70% isopropyl, 1 L | £9 | $11 | A$18 |
| Nitrile gloves and masks | £9 | $11 | A$18 |
| Culture (syringe or liquid culture) | £20 | $25 | A$40 |
| Spare gasket or weight | £5 | $6 | A$10 |
| Total | £248 | $306 | A$506 |
Two thirds of that number is three items: the pressure cooker, the culture and the heat mat. Everything else is a rounding error, which is worth knowing, because economising on gloves and jars saves you almost nothing while economising on the pressure cooker costs you grows.
Tier three: the £355 grow that makes every grow after it nearly free
Add culture work to tier two and the marginal cost of every future grow collapses, because you stop buying cultures.
| Item | GBP | USD | AUD |
|---|---|---|---|
| Everything in tier two | £248 | $306 | A$506 |
| Agar powder, 100 g | £11 | $13 | A$22 |
| Light malt extract, 500 g | £8 | $10 | A$16 |
| Sterile petri dishes, 20 | £11 | $13 | A$22 |
| Scale reading to 0.1 g | £13 | $16 | A$26 |
| Alcohol lamp and fuel | £9 | $11 | A$18 |
| Magnetic stir plate | £32 | $40 | A$65 |
| Jars for culture storage | £15 | $18 | A$30 |
| Parafilm or micropore for plates | £8 | $10 | A$16 |
| Total | £355 | $437 | A$721 |
A culture is the only genuinely recurring cost in cultivation, and agar removes it. Once you can keep a line alive on a plate and refresh it into liquid culture, you are producing your own starting material indefinitely from something you bought once. That is a hundred pounds of equipment that pays for itself in five grows and then keeps paying. The stir plate is optional, and our semi-solid liquid culture tek covers a method that needs no stir plate at all and shows you contamination earlier, which for a first culture library is arguably the better tool anyway.
The line item that decides everything
The pressure cooker is between a third and a half of a sensible first grow, and it is the item people most want to skip. So, plainly: a pressure cooker reaching 15 PSI holds around 121 degrees C, and that temperature held long enough is what kills bacterial endospores. A pot of boiling water holds 100 degrees C and does not. This is not a matter of degree, it is a matter of kind. Every method that avoids a pressure cooker is a method for managing the consequences of not killing everything.
- Size. Domestic stovetop cookers in the 21 to 23 litre range are the standard choice and will hold four to six litre jars.
- Check the pressure. A good many mid-range models top out at 10 or 12 PSI, which changes your times and is worth knowing before rather than after.
- Second hand is fine. A used cooker with a fresh gasket at £30 to £50 is the single best value purchase available in this hobby.
- Multicookers are a different tool. Electric pressure cookers usually reach around 11 to 12 PSI. Workable with longer times, not equivalent.
What the kits charge you for
Take a typical £299 boxed bundle apart and you find roughly £70 of contents: a tote, a coir brick, some vermiculite, six jars, tape, gloves and a culture. There is no pressure cooker in it, because a pressure cooker is heavy and would eat the margin. So the most expensive purchase you can make also leaves you needing the most important purchase you have not made. The one thing a kit genuinely sells is a decision-free afternoon, and for some people that has real value. Buy it with your eyes open: you are paying a premium of two hundred pounds to not read a list, and you will still be reading the list next time.
What you do not need for a first grow
- A laminar flow hood. Three hundred pounds and up, magnificent, and unnecessary until you are doing agar work at volume. A twelve pound still air box does the same job slower.
- Pre-sterilised grain bags. Convenient, and roughly four times the cost of a bag of rye and an hour of your time. Fine later, wasteful now.
- Premium named genetics. A first grow tests your technique, not your culture. Spending forty pounds on a fashionable name means an expensive culture dies of your beginner mistakes instead of a cheap one.
- An ultrasonic humidifier with a controller. A tub with the right hole pattern and a substrate at field capacity holds its own humidity. Humidifiers mostly solve problems created by badly built tubs.
- UV sterilising lamps. They sanitise the surface they are pointed at, for as long as they are pointed at it. They do not sanitise a room, and they will damage your eyes with less provocation than you would think.
- A CO2 meter. Genuinely useful, and genuinely a second-grow purchase. Learn what the tub looks like first, then measure it.
The costs nobody itemises
- A failed run. Budget for one. Not because you are careless, but because everybody's first attempt teaches something that could only be learned by losing it. In tier two the consumable cost of starting again is about £14. The real cost is three weeks and some enthusiasm, and knowing the retry is in the budget from the start is what gets people through it.
- Electricity. A stovetop cooker at full pressure for ninety minutes, plus come-up, is roughly 1.5 to 2 kWh, around 50p a run at current UK rates. A heat mat for a month is another pound or two. Not a real cost, but people ask.
- Space and time. Six weeks of a warm dark cupboard and about eight hours of hands-on work spread across it. If you value your time at anything at all this dwarfs every line item above, and it is also the part people enjoy.
- Replacement. You will crack one tote, ruin one jar lid, and buy a second bottle of isopropyl sooner than you expect. Add ten percent.
The number that actually matters
Here is the second-grow list for someone who bought tier two: rye, coir, vermiculite, gypsum, a bottle of alcohol and a culture. About £14, and about £6 if the culture came from your own agar plate.
That is the real economics of cultivation, and it is why the sticker price of a first grow is such a poor guide to anything. You are not buying a harvest. You are buying a small permanent capability, and the running cost of it is roughly the price of a pint.
We are deliberately not going to run the price-per-gram comparison that every forum thread ends with. Framing a slow horticultural practice as an arbitrage against a street price is how people end up rushing stages, cutting corners on sterile work, and scaling past what they can keep clean. The people who grow well are, without exception, the ones who found the process interesting rather than cheap.
Regional notes
- United Kingdom. Prices above include VAT. Pressure cookers and totes are cheap and widely available. Agar and malt extract are easiest and meaningfully cheaper through homebrew and laboratory suppliers rather than anything mushroom-branded.
- United States. The cheapest of the three markets by roughly twenty percent, with the widest second-hand supply of pressure canners, which are the same tool under a different name and often better made.
- Australia. Add thirty to forty percent on almost everything, driven by freight rather than tax, and expect longer waits on anything laboratory-adjacent. Buying coir, vermiculite and gypsum from garden and hydroponics suppliers rather than specialist sellers is the biggest single saving available.
Before you spend anything
Cultivating psilocybin mushrooms is illegal in most of the world, and the legal position of spores is separate from, and often stranger than, the legal position of cultivation. Our law map tracks where each jurisdiction stands and when it last changed. Read your own entry before you buy a single jar, because the cheapest first grow is the one you correctly decided not to start.
Everything on these lists works identically for gourmet cultivation, which is legal essentially everywhere. If you are unsure, that is where to spend the £248, and the equipment is the same equipment.