From 1 January 2026, you will be able to legally grow cannabis seeds purchased from HiSeeds. However, to avoid getting into conflict with the law, you must follow several rules. We will explain how to legally grow cannabis with a high THC content.
Warning: This article is for informational purposes only and does not encourage anyone to break the law or consume narcotic substances. We are not lawyers and do not provide legal advice. Before taking any action, check the valid and current wording of the regulations in the official Collection of Laws or consult a solicitor. Only the relevant authorities and courts can provide the final interpretation of legal regulations. Links to the official wording (effective from 1 January 2026):
Who may legally grow cannabis and where
The very first condition that every aspiring grower must meet is the age limit. Anyone who wants to legally grow, harvest and possess cannabis with a THC content above 1% must be at least 21 years old. You can plant the plants at home under artificial lighting or even in the garden, but remember that your actions must not disturb those around you. So for indoor growing, an odour filter is a necessity, and if you are planning to grow outdoors, it is better to first “consult” your neighbours.
How many plants can I grow and what quantity of cannabis may I harvest
You may grow a maximum of three cannabis plants with a THC content above 1%, and you may harvest a maximum of 100 grams of processed cannabis from them, meaning dried tops (buds). The law assumes that freshly harvested and unprocessed cannabis will weigh more than the final product. Drying, trimming and other processing of whole plants is permitted even if they weigh more than 100 grams. However, you must bear in mind that at the end of the process you should have no more than 100 grams of dried material left.
Possession of more than 100 grams of dried material (in a dwelling) will be punished as an offence with a fine of up to CZK 50,000, provided the amount does not exceed 200 grams. Possession of more than 200 grams in a dwelling is a criminal offence punishable according to the seriousness of the offence. The plant-count limit for an offence has been set at five.
How to handle cannabis
Although there will be some easing of the law from January 2026, that does not mean it will no longer be possible to get into conflict with the law when handling cannabis. First of all, let us not forget that the limit for possession of cannabis outside a dwelling has been set much lower, at 25 grams. If you exceed 50 grams, the offence becomes a criminal offence. Consumption in public also remains prohibited and will be punished at least by a fine.
Another important fact is that handing over cannabis (even free of charge) or otherwise sharing it remains a criminal offence. Unfortunately, you may not share your harvested crop with friends. The production of extracts, hash or other products obtained from cannabis is also a sensitive issue. The law distinguishes between processing and production, with the latter being expressly prohibited. Drying and trimming flowers can be considered processing, but it depends on the interpretation of the state authorities whether, for example, knocking resin off the plant will be regarded as production. More complex technological processes (solvent extraction, BHO, rosin) are prohibited without the relevant licence.
You can find more useful tips for growers and news from the world of cannabis on the HiSeeds blog.