A guide to one strain
Hollandia truffles, one strong strain explained
Updated
Hollandia is one of the strongest magic truffles sold in Dutch smartshops. Avalon Magic Plants, the shop behind this site, estimates it at roughly twice the strength of Atlantis and advises half a 15 gram pack for anyone new to it. That estimate comes from the grower and the shop, not from a published laboratory test, and this guide handles it that way.
The pages below cover one strain in depth: what you are buying, how strong it is likely to be, how much to take, how to prepare, which combinations are dangerous and where it is legal. Fresh truffles are legal in the Netherlands. In most other countries they are not.
Where Hollandia sits
- Mild Mexicana · Pajaritos
- Medium Tampanensis · Atlantis
- Strong Hollandia
Shop classification by Avalon Magic Plants, based on grower information and customer feedback. Not a laboratory measurement.
The short version
- What it is. Fresh sclerotia (the "truffles") of a cultivated Psilocybe strain, grown in the Netherlands. The seller does not name the species. More about Hollandia
- How strong. Rated among the strongest truffles by shops. Measured potency of truffles varies almost threefold between samples, so batch matters as much as name. Strength explained
- How much. Avalon advises 7.5 grams for a first Hollandia session and up to 15 grams for experienced users. Below 7.5 grams is a sensible start if you are new to truffles altogether. Dosage
- Who should skip it. Anyone with a personal or family history of psychosis or bipolar disorder, anyone taking lithium, and anyone under 18. Safety
- Where it is legal. Fresh truffles are legal to buy and carry in the Netherlands. Dried truffles are not, and taking truffles across a border can mean prosecution. Legal status
A strong strain does not change what a trip is. It shortens the distance between a pleasant afternoon and an overwhelming one, so the margin for error is smaller.
Why a whole site about one strain
Most pages about Hollandia are shop listings that repeat the same few lines. They rarely say what the strength rating is based on, what a sensible dose is for someone who has only tried a mild truffle, or what changes when the effects are stronger. This site tries to answer those questions with sources, and says where the evidence stops.
Where to start
New to truffles: read set and setting and safety before anything else, and consider whether a milder strain is the better first step. Experienced with milder truffles: the dosage page explains how to step up to Hollandia without taking a strain jump and a dose jump at the same time.
The guide, chapter by chapter
- I What Hollandia truffles are Hollandia truffles are fresh Psilocybe sclerotia grown in the Netherlands and sold as a strong strain. What is known, what is not, and storage.
- II How strong Hollandia truffles are Hollandia is rated one of the strongest magic truffles. What that rating rests on, what lab data exists, and how a strong session unfolds.
- III How much Hollandia to take Dosing Hollandia magic truffles in grams: where to start, how to step up from a milder strain, how to take them, and why you should never re-dose early.
- IV Set and setting for a strong truffle How to prepare a Hollandia session: your state of mind, the place, the sitter, the day itself, and what to do when a strong trip becomes difficult.
- V Hollandia safety and dangerous combinations Who should not take Hollandia truffles, which combinations are dangerous (lithium, MAO inhibitors), the physical effects and the real risks of a strong strain.
- VI Where Hollandia truffles are legal Fresh Hollandia truffles are legal in the Netherlands and illegal almost everywhere else. Dutch rules, Germany, the UK, the US, and travelling.