FAQ – delivery, storage and growkit issues

This page collects the most common questions about delivery, storage and visible changes in growkits. The answers are based on our everyday work with mycelium, customer questions and widely available mycological knowledge. Remember: our products are research and collector’s items. We do not encourage cultivation in countries where it is illegal.

Delivery & shipping

When will the package reach me?

Shipments within Poland are sent from Monday to Thursday. If you choose an InPost parcel machine and your order is paid by 12:00 (noon), the package usually leaves our warehouse the same day. For courier delivery, orders paid by 10:00 are typically shipped the same day.

Within Poland, most parcels reach customers on the next working day after dispatch, although in smaller towns it may take 1–2 days longer, especially during busy periods (December, Black Friday, public holidays).

Do you ship to other EU countries?

Yes. We deliver shipments to EU countries outside Poland on Mondays and Tuesdays to maintain maximum product freshness. We want the growkits to spend as little time as possible in courier warehouses over the weekend and to arrive with a long remaining shelf life. Delivery time usually ranges from 2 to 5 business days, depending on the destination country and local courier network.

How do you protect growkits during transport?

Growkits are stored in a cold room and packed just before shipping. We use protective cardboard packaging and, depending on the season, additional insulation to reduce temperature fluctuations. Short-term temperature changes during transport are normal, but extended exposure to heat can stress the mycelium – this is why we avoid dispatching EU orders at the end of the week.

Do you ship during heat waves or severe frost?

Extreme temperatures (long heat waves above approx. 30 °C or severe frosts) may temporarily affect shipping schedules. In such cases we may:

• limit dispatch days,
• temporarily turn off some shipping options,
• contact you if we believe postponing the shipment will significantly improve product safety.

If you expect to be away (e.g. holidays), it’s worth choosing a delivery day when you can collect and refrigerate the parcel immediately.

What should I do when the parcel arrives?

As soon as you collect the parcel, take the growkit out of the box and place it in the refrigerator (usually 2–5 °C). Do not keep it for hours in a hot car or by a heater. A short inspection from the outside (without opening the box in warm air) is fine – if you notice obvious mechanical damage, see the question below.

What if my package or growbox is damaged?

If the cardboard box is crushed, torn or wet, or the plastic container inside is visibly cracked, please:

• take clear photos of the parcel and the damaged growbox,
• store everything in the refrigerator while we analyse the case,
• contact us via email with your order number and pictures.

Minor cosmetic damage to the outer box without cracking the plastic container is usually not a problem. If in doubt, write to us – we prefer to check one case too many than one too few.

Growkit condition on arrival

What should a fresh growkit look and smell like?

A healthy growkit usually contains a compact, whitish block of mycelium. Depending on the strain, you may notice denser “rhizomorphic” strands or more cottony structures. A fresh kit should:

• smell like fresh mushrooms or damp forest soil,
• have a firm, slightly springy substrate,
• show no slimy, grey, black or strongly coloured patches.

If you detect a strong mouldy, “cellar-like” odour, this is a warning sign – see “How can you tell if a growkit is moldy?” below.

There is condensation on the walls – is this normal?

Yes. Droplets of water on the walls of the container or bag are usually just condensation, especially when the kit has travelled through different temperature zones. As long as the substrate looks solid and the smell is correct, light condensation is completely normal.

The substrate has shrunk slightly and pulled away from the wall – is this a defect?

Slight shrinkage of the substrate, especially during longer storage or transport, is normal. The block may pull away from the plastic walls by a few millimetres, which is not a sign of contamination in itself. We are more concerned about:

• visible discolouration with a strong odour,
• slimy patches or clearly fuzzy, coloured mould.

If you are unsure, you can compare your kit with the photos and descriptions in our article on has my growkit gone moldy?.

Mycelium problems & visible changes

For more on mould and visual changes on growkits, see the blog article: Has my growkit gone moldy?

Blue–green spots on the growkit – is it mold?

Have you noticed small blue or blue–green spots on the mycelium, even before opening the container? If the plastic box is intact and has not been mechanically damaged, there is usually no reason to panic. Greenish and bluish spots can appear both on the packed growkit and on mushrooms (in countries where cultivation is legal). This is often called the “bluing effect” and is linked to oxidative changes in the compounds present in the mycelium.

In most cases it is a natural reaction to pressure, temperature changes or minor mechanical stress. The key is to look at:

• overall smell (fresh vs. clearly moldy),
• structure (thin, “ink-like” staining vs. fluffy, fuzzy mold),
• whether the colour stays on a cotton swab – see below.

Mycelium covered with a white coating – is it mold?

No – as long as it still smells like mushrooms and not like mold. The white, cottony fluff on the surface is usually just developing mycelium. Its fibres thicken, and in countries where cultivation is legal, they may later form pins (the first visible primordia) and fruiting bodies.

White mycelium becomes a problem only when:

• the smell clearly changes to musty or sour,
• the surface becomes slimy,
• other colours (grey, black, pink, intense yellow) appear inside the fluff.

White “miasma” / fuzz on the stems – what does it mean?

If in regions where cultivation is legal you see a white fuzz climbing up the stems, education sources describe this as mycelium growing on the surface, often in response to slightly higher humidity or limited air exchange. It is not, by itself, a sign of contamination – it is the same organism extending its reach. In our kits, which are sold for research and documentation, such fuzz is simply a manifestation of mycelial vigour.

How can you tell if a growkit is moldy?

There are two simple checks often mentioned in mycological practice: smell and the cotton swab test.

• Smell test: a contaminated growkit smells like mold – think of a damp cellar, old bread or a wet wall. A healthy kit smells like fresh mushrooms or moist forest soil. This difference is usually very clear.
• Cotton swab test: in clean conditions, gently touch the suspicious area with a cotton swab. If a thick, coloured layer (green, black, intense blue) clearly transfers onto the swab, this strongly suggests mold. If the swab remains mostly clean and the colour is “inside” the tissue rather than on top, it is more likely natural mycelial discolouration.

If you want to learn more about typical mycelial infections, you can check our educational article: has my growkit gone moldy?.

Black coating on mycelium after a flush – is it normal?

In countries where cultivation is legal, black or very dark brown dust on the surface often turns out to be spores released by mushrooms that were harvested too late. When fruiting bodies open their caps, they drop millions of spores, which can cover the cake in a dark layer. This is not mold in itself, but it usually signals that the timing was off and the mycelium has shifted its energy towards reproduction rather than further cycles.

Yellow coating on the mycelium – should I be worried?

It depends on the context. If you notice a slight yellowish tint immediately after opening the parcel, but the growkit smells like mushrooms, it is usually a sign of stress (e.g. from transport temperature) and metabolic by-products. The mycelium may be a bit “tired”, yet still viable.

More concerning is when:

• the yellow colour appears later,
• the smell becomes sour or unpleasant,
• the surface looks wet and slimy.

In such cases some growers (in fully legal contexts) use hydrogen peroxide on suspected bacterial spots. If intense foaming appears, it may indicate infection. The chance of “saving” a kit depends on how large the affected area is – sometimes intervention helps, sometimes not. From an educational perspective, even contaminated blocks can still be useful as a visual example of what contamination looks like.

Storage & shelf life of growkits

How do I properly store a growkit after receiving a shipment?

As soon as you pick up the parcel, put the growkit in the refrigerator, ideally at 2–5 °C. Do not keep it near radiators, on a windowsill in the sun or on a warm floor. Short temperature fluctuations during transport are acceptable, but long exposure to heat accelerates metabolism and shortens the useful life of the kit.

You can read more about best practices in our detailed guide: how to store a growkit.

How long can I keep a growkit in the fridge?

Under proper cold-chain conditions, the manufacturer typically declares stability of up to several months (often around six) from production. The exact date is visible on the packaging. For the best research and microscopy results we recommend beginning your work within 72 hours of receiving the kit – this is when mycelium usually shows the most “fresh” and expressive structures.

Can I freeze a growkit?

No. Freezing is not recommended. Ice crystals can damage the mycelial network and the substrate structure, leading to irreversible loss of vitality. Standard refrigerator temperatures (2–5 °C) are ideal – below 0 °C is too low.

What if there is a power outage or the fridge stops working?

A short power outage (a few hours) is usually not a disaster, especially if the room is cool. If the refrigerator fails for longer:

• move the kits to the coolest available place at home, away from sunlight,
• avoid large temperature swings (e.g. moving from cold balcony to hot kitchen repeatedly),
• once the fridge is running again, place the kits back inside.

Even if the mycelium survives such an incident, its long-term stability may be reduced – another reason to start your educational work reasonably soon after purchase.

Legal & safety information

Are growkits legal in Poland?

Growkits containing mycelium are currently legal to possess in Poland as research and collector’s material, because the mycelium itself does not contain prohibited alkaloids. However, cultivation and possession of psilocybin mushroom fruiting bodies is illegal. Legal regulations change over time and vary between countries; for a general overview you can consult this external resource: legal status of psilocybin mushrooms (we are not responsible for its content).

Do growkits contain psilocybin or other psychoactive substances?

No. The kits we offer contain mycelium colonised substrate intended for microscopy, documentation and educational work. Psilocybin, where legally researched, is associated with fruiting bodies that must not be produced in countries such as Poland. Our products are sold strictly as research and collector’s items.

Can you advise on dosage or effects?

No. We do not provide dosing advice, trip guidance or recommendations regarding consumption of psychoactive substances. All content on psychodelicroom.pl is for educational and research purposes only. If you read about set & setting or psychedelic integration on our blog, treat it as general knowledge – not as personalised medical or therapeutic advice.

What should I do with a growkit after my research is finished?

In countries where cultivation is illegal (including Poland) we recommend treating a growkit as a temporary research material. After you have completed your microscopy or educational work, the kit should be disposed of safely. Do not attempt to produce or store fruiting bodies. In doubt, always prioritise legal compliance and safety.

All information on this page is provided for educational purposes. It does not constitute legal, medical or therapeutic advice. Always follow the regulations in your country and consult a qualified professional if you have questions about law or health.