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Prohibited plants in the garden: what species should you avoid in the garden design?

There are plants that we are not allowed to grow in our gardens and we are not just talking about cannabis here! We should know them so that we do not find ourselves on the wrong side of the law. Prohibited plants are primarily associated with the harm they cause in humans, such as psychedelic effects.

Prohibited plants in Germany

Prohibited plants in the garden include hemp

We show you plants that are prohibited by law in Germany. There are also plants that bring no benefit to nature and the environment, but only damage, and therefore their cultivation in the garden is increasingly criticized by conservationists as a crime against nature.

Cannabis is illegal in Germany

Cannabis is illegal in Germany and may not be cultivated

Cannabis is a genus of flowering plants in the Cannabaceae family. The genus is widely considered to be native to and originating in Asia. Cannabis is also known as hemp, although this term is often used only for cannabis varieties that are not grown for drug use.

Hemp is used for the production of cannabis products

Cannabis is illegal in Germany, but there are exceptions to the rule. The German Narcotics Law classifies cannabis as a Schedule III drug: neither too dangerous to trade nor too dangerous to prescribe. LSD and heroin, on the other hand, fall under Schedule I – they may not be distributed under any circumstances, while Schedule II narcotics such as cocaine may not be prescribed. Only the female plant is used for the production of cannabis products, but the male plant is also banned in Germany.

Why do prohibited plants include opium poppy?

Parts of the opium poppy are used for the production of narcotics


Opium poppy seeds are used in the food industry, but parts of the plant are used to make powerful medicines and narcotics because the milky juice contained in the seeds has a high morphine content. Those who grow opium poppies in their gardens face up to 5 years in prison.
Opium poppies in Germany can only be grown on the basis of a permit from the Federal Opium Agency at the Federal Institute for Drugs and Medical Devices, and only some varieties may be grown (usually low-morphine ones such as ‘Mieszko’, ‘Viola’, and ‘Zeno Morphex’).

Coca shrub is used for narcotic production

Coca bush is not allowed to be planted by gardeners in Germany

Coca is a South American shrub whose leaves contain cocaine and are used to make narcotics; coca leaves continue to be used in the Andes to increase concentration and reduce pain, fatigue, and hunger.

Prohibited plants: Aztec sage (Salvia divinorum).

Aztec sage is one of the banned plants in Germany


Salvia divinorum, a perennial herb in the mint family, is native to Oaxaca, Mexico, and has been used for centuries by Mazatec shamans for divination and healing purposes. Salvia has more than 500 species, which includes the sage plant . It grows up to one meter high and is characterized by large green leaves, square but hollow stems and flowers of white and purple color. Salvia divinorum is one of several psychedelic plants used by the Mazatec Indians in spiritualism.

Avoiding invasive plants: which are they?

Invasive plants should be gradually abandoned by gardeners

Invasive plant species have a negative impact on nature and although conservationists warn against them, they are not currently banned in Germany. According to experts, they are useless for the environment and therefore we should not grow them in our gardens, although most of them are very popular among gardeners. The harm of such species is the displacement of native plants and the disappearance of food for insects and birds. German experts criticize the cultivation of the following invasive species.

Cherry laurel does not provide food for insects

Cherry laurel displaces native plants, so food for insects disappears

Prunus laurocerasus, also known as cherry laurel, common laurel, and sometimes English laurel, is an evergreen cherry tree species native to the Black Sea regions of southwestern Asia and southeastern Europe from Albania and Bulgaria through Turkey to the Caucasus and northern Iran. The common names of this species refer to the similarity of foliage and appearance to laurel (Laurus nobilis) and like laurel, Prunus laurocerasus has been used to make laurel wreaths. The cherry laurel provides shelter for birds, but no food for insects and birds, so experts advise against it.

Bamboo is not suitable for nesting

Bamboos are not forbidden plants, but refraining from their cultivation is advisable

Bamboos are a diverse group of evergreen perennial flowering plants in the subfamily Bambusoideae of the grass family Poaceae. Giant bamboos are the largest members of the grass family. As with other grasses, the internodes of the stem of bamboo are usually hollow, and the vascular bundles are not cylindrical in cross-section, but are scattered throughout the stem. The absence of secondary wood causes the stems of monocotyledonous plants, including palms and large bamboos, to be columnar rather than pointed. However, they do not provide food for insects and are not suitable for nesting.

Forsythia does not produce nectar for bees.

Cultivation of forsythia is criticized because it is useless for nature

It is a genus of flowering plants in the olive family Oleaceae. There are about 11 species, mostly native to eastern Asia, but also to southeastern Europe. Forsythia – also one of the common names of the plant – is named after William Forsyth.

Forsythia are deciduous shrubs that typically grow 1 to 3 m tall, rarely up to 6 m, and have rough gray-brown bark. Leaves are opposite and mostly simple, but sometimes trifoliolate, with a basal pair of small leaflets; they range from 2 to 10 cm and rarely up to 15 cm long and have toothed or smooth margins. Forsythia flowers, but its flowers do not produce pollen or nectar, so it is not useful to bees.