Grow room · PES Amazonian 1200cc kit

PES Amazonian, the grow forecast from soak to last flush

22° to 25 °C, room, out of the sun

Day 1 · Set up

Into the filter bag

Droplets form on the inside of the bag within hours.

A grow kit in a clear filter bag on a bookshelf, with tall pale stems and large golden-brown caps

Temperature22 to 25 °Croom, out of the sun
Humidityclosed, misted bagGrowth is best above about 90% RH
Fresh airbag closedFrom the first pins on
Lightindirect daylightNever direct sunlight

What to do on day 1

Drain the water, keep the lid, pour about 150 ml clean water into the filter bag, set the kit inside, spray the walls, fold the top twice and clip it. Place it at 150 to 200 cm height.

35-day forecast

Tap a day. Ranges from the kit's manual: pins 2 to 4 weeks after setup, harvest 1 to 2 weeks later.

The kit forecast, day 0 to day 35
Day	Phase	Temperature	Humidity	Fresh air	Light	What you see	What you do	Risk
0	Soak	cold, in the fridge	under water	lid closed	dark fridge	A white, fully colonised substrate in a 1200 ml box.	Open a corner of the lid, fill the box with cold tap water and let it soak for about 12 hours in the fridge. The shop says to do this on arrival.	low
1	Set up	22 to 25 °C	closed, misted bag	bag closed	indirect daylight	Droplets form on the inside of the bag within hours.	Drain the water, keep the lid, pour about 150 ml clean water into the filter bag, set the kit inside, spray the walls, fold the top twice and clip it. Place it at 150 to 200 cm height.	raised
4	Wait	22 to 25 °C	closed bag	bag closed	indirect daylight	White surface, rope-like strands of mycelium along the sides.	Nothing. Check the colour from outside the bag without opening it.	low
8	Wait	22 to 25 °C	closed bag	bag closed	indirect daylight	No mushrooms yet. The manual allows 2 to 4 weeks.	Keep it out of direct sun and away from heaters. Do not open the bag.	low
12	Wait	22 to 25 °C	closed bag	bag closed	indirect daylight	Condensation on the bag and a white surface; the pin window is close.	Patience. The forecast window for pins opens in a few days.	low
15	Pins	22 to 25 °C	high, bag opened briefly	open 1 to 3 times a day	indirect daylight	Earliest day for the first tiny mushrooms, two weeks after setup.	Once you see pins, open the bag one to three times a day and close it with fresh air trapped inside.	raised
18	Pins	22 to 25 °C	high, bag opened briefly	open 1 to 3 times a day	indirect daylight	Pins stretch upward. Some stay small and turn dark: growers report that this line aborts pins quite often.	Keep airing the bag daily. Leave aborted pins alone.	raised
22	Harvest	22 to 25 °C	high, bag opened briefly	open 1 to 3 times a day	indirect daylight	In a fast kit the first mushrooms are ready: one week after the earliest pins.	Pick each mushroom with a twist just before the veil under the cap tears, so no spores fall on the substrate.	high
25	Harvest	22 to 25 °C	high, bag opened briefly	open 1 to 3 times a day	indirect daylight	Large caps with a pointed centre; the shop calls them golden and nipple-shaped.	Keep picking as each mushroom reaches the veil stage. Tall mushrooms need room above the substrate.	high
29	Check	22 to 25 °C	closed or airing	depends on the kit	indirect daylight	Four weeks after setup. Slow kits pin now at the latest.	No mushrooms at all by now? The manual says to start again at step 1 and soak, because the mycelium may not have been activated.	raised
32	Flush 2	fridge, then 22 to 25 °C	under water, then bag	lid closed, then bag	indirect daylight	After the first harvest the surface is bare where the mushrooms were picked.	Start again at step 1: soak about 12 hours, then back into the bag. The manual gives no separate timing for later flushes.	raised
35	Flush 2	22 to 25 °C	closed bag	bag closed until pins	indirect daylight	Fast kits wait for their second pins; slow kits may still be in their first harvest.	Repeat the cycle. On average the manual expects about three flushes per kit.	raised

Ranges from the Dutch-Smart grow kit manual and the PES Amazonian product page, read 16 October 2026. Day 0 is the day the kit arrives. Growing the mushrooms is illegal in the Netherlands and most other countries.

Contamination radar

Risk raised

The most handling of the whole cycle. Gloves and disinfected hands, as the manual asks.

low: bag closed
raised: bag opened
high: hands in the bag

Our reading of the manuals: risk rises with every opening and every touch. Not a measurement. Healthy mycelium is white or yellowish-white; green, black, red or pink is contamination.

The kit in this forecast

PES Amazonian - 1200cc Mushroom Grow Kit 1200 ml box, colonised · 22 to 25 °C · about 3 flushes €33.95Dutch-Smart View the kit at Dutch-Smart

Legal to buy in the Netherlands for adults. The mushrooms it grows are not legal there.

Forecast discussion · updated 16 October 2026

PES Amazonian is a cultivar of Psilocybe cubensis named after Pacific Exotic Spora (PES), a spore supplier in Hawaii, and after the Amazon, where the line is said to have been collected. No collection record, published description or laboratory analysis of a culture sold under this name exists. What can be described is how the line is sold today and what the shop's own manuals say about growing it, and that is what the forecast above is built from: the PES Amazonian 1200cc kit from Dutch-Smart, day by day.

What the forecast is based on

Every day card uses the temperatures, waiting times and steps from the kit's manual and product page. The manual gives ranges, so the forecast does too: first pins after 2 to 4 weeks in the bag, harvest 1 to 2 weeks after that, about three flushes on average. Where the manual says nothing, the card says nothing. The detailed kit forecast adds the 2100 g grow bag, which follows different rules.

What is known about the strain

The shop describes PES Amazonian as a large, thick mushroom with golden, nipple-shaped caps, quick colonisation and mycelium that is "more rhizomorphic than average". Older grower pages describe big caps on slim stems, fast and strong bruising, and a tendency to abort pins. The traits page sets those reports side by side, and the origin page explains what PES was and what the hybrid and Amazon stories rest on.

Strength has never been measured on a culture sold as PES Amazonian. The closest data are from 1982, when researchers grew cultures from a spore print collected near Pucallpa in the Peruvian Amazon. The potency page shows those figures and why they cannot simply be transferred.

Which Amazonian product to choose

Dutch-Smart sells the line in four forms. Ordered from least to most work:

You want	Choose	Why
the fewest steps, no soaking	Amazonian Grow Bag 2100g	fully colonised, no activation step, the manual says not to open it until pins appear
the classic kit with several flushes	PES Amazonian 1200cc kit	soak, bag, wait; about three flushes on average according to the manual
to work with spores under sterile conditions	PES Amazonian spore ampoule	spore solution with a sterile syringe; for experienced growers
a ready spore syringe	Amazon spore syringe	same strain text as the kit; the shop does not ship syringes outside the EU

Amazonian Grow Bag 2100g €49.95Dutch-Smart View at Dutch-Smart

PES Amazonian - 1200cc Mushroom Grow Kit €33.95Dutch-Smart View at Dutch-Smart

PES Amazonian - Spur Ampoule | 10 ml €14.90Dutch-Smart View at Dutch-Smart

Buying a kit, a grow bag or spores is legal in the Netherlands. The mushrooms are not: they fall under the Opium Act as soon as they appear, so growing them is an offence there too. In the United Kingdom, Germany and under US federal law the rules are stricter. The law page has the details, checked on 16 October 2026, and the spores page explains why spore ampoules sit in a separate legal position.

This site is published by the team behind Dutch-Smart; the about page explains how it is made.