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Poisonous weeds - 9 varieties from mild to severely dangerous

You can't tell from the plants whether weeds are poisonous. For their own protection, nature and garden lovers should know and, above all, avoid poisonous weeds.

For some it is plants that are a natural part of a garden's ecosystem, for others it is a nuisance from which no beauty can be won. Weeds are mind-boggling, but shouldn't be taken lightly when dealing with poisonous strains. Our overview shows which "weeds" can sometimes cause massive damage to your health.

11 Creeping buttercup (Ranunculus repens)

Creeping buttercup (Ranunculus repens) spreads very quickly, especially when the weeds get enough water (rain). Its creeping runners make it a thorn in the side of lawn lovers in particular. The creeping buttercup blooms from May to September and spreads itself during this time (seeds). The herb is considered to be slightly poisonous, but you should still wear gloves when fighting it.

Creeping buttercups are poisonous to both humans and animals. The herb should not be consumed and skin contact should be avoided.

Valid active ingredients: Protoanemonin
Consequences of poisoning: Skin irritation, blistering, nausea, vomiting

1. Creeping buttercup (Ranunculus repens)

22 giant hogweed (Heracleum mantegazzianum)

Giant hogweed, also popularly known as Hercules shrub, can be used for underplanting, but is generally considered a weed. The reason for this is the rapid spread and, above all, the fact that the Heracleum mantegazzianum displaces other plants. The numerous flowers are the beekeeper's delight, but hobby gardeners try to control the perennial with all possible means.

The most poisonous thing about hogweed is the leaking plant sap, which is particularly good in connection with sunlight full dose unfolds.

Toxic active ingredients: Furocoumarins
Consequences of poisoning: Itching, reddening of the skin, burns, blistering

2. Giant hogweed (Heracleum mantegazzianum)

33 Ambrosia (Ambrosia artemisiifolia)

Ambrosia is not a poisonous weed in the traditional sense, but it should be mentioned in this list. The plant, which is also known as mugwort, ragweed or wild hemp and comes from North America, is spreading more and more in Germany and does not stop at private gardens. Ambrosia is one of the most common allergy triggers during flowering from July to December. To date, there is no obligation to report in Germany, but findings of the poisonous weeds should be reported to the local green area office.

Toxic active ingredients: Trigger: pollen
Consequences of poisoning: allergic asthma, hay fever, conjunctivitis

3. Ambrosia (Ambrosia artemisiifolia)

44 Ragwort (Jacobaea vulgaris)

Jacob's ragwort, also known as toad weed, spider weed, havens and Jacob's ragweed, does not make any special demands on the soil. The main flowering time - recognizable by the striking yellow flowers - is in summer, but can extend into October. The herb is particularly troublesome to horse owners and farmers because of its high toxicity. Jacob's herb is not only found in meadows and on field borders, it can also spread in natural gardens.

Toxic active ingredients: Pyrrolizidine (alkaloids)
Consequences of poisoning: Liver damage in humans and animals, carcinogenic

4. Jacob's ragwort (Jacobaea vulgaris)

55 Black henbane (Hyoscyamus niger)

The black henbane belongs to the nightshade family, can grow up to 60 cm high and shows a dark yellow, almost dirty-looking bloom from June to October. Black henbane is not only poisonous, it also has a very unpleasant smell and is therefore not particularly popular with gardeners. Black henbane grows particularly well on nitrogenous soil, on paths and on walls. All parts of the Hyoscyamus niger plant are poisonous, especially the seeds and roots.

Toxic active ingredients: Hyoscyamine and scopolamine
Consequences of poisoning: racing pulse, unconsciousness, death

5. Black henbane (Hyoscyamus niger)

66 Common thorn apple (Datura stramonium)

The common thorn apple or white thorn apple can grow to heights of up to 2 meters. The plant owes its name to its prickly capsules, which form from the bloom between July and October. The latter smells sweet, but the smell of the stems and leaves is generally perceived as unpleasant. The common thorn apple grows preferentially by the wayside, but also in rubbish spots. All parts of the common thorn apple are poisonous, especially the roots and seeds.

Toxic active ingredients: L-hyoscyamine, L-scopolamine, atropine (alkaloids)
Consequences of poisoning: Skin irritation, nausea, vomiting, confusion and even intoxication

6. Common thorn apple (Datura stramonium)

77 spotted hemlock (Conium maculatum)

The spotted hemlock is a biennial herbaceous plant that likes to grow protected on hedges and fences. The Conium maculatum prefers a nutrient-rich clay soil and is almost unmistakably recognizable by its odor reminiscent of mouse urine. The hemlock (all parts of the plant) is considered highly poisonous in this country and can even be fatal for humans.

Toxic active ingredients: Pseudoalkaloid Coniin
Consequences of poisoning: Burning mouth, gag reflex, blurred vision, muscle cramps, respiratory paralysis

7. Spotted hemlock (Conium maculatum)

88 Common soapwort (Saponaria officinalis)

The common soapwort can reach a stature height of up to 80 cm, even with this poisonous weed the flowering time is from June to October. The common soapwort can often be found at the roadside, the plant is satisfied with a sand or stone soil. As you can see from the name, soapwort was used as a detergent substitute in the past. Today it is still found in some drugs, but you have to know that the common soapwort is deadly in high doses. Soapwort must not be eaten raw.

Toxic active ingredients: Protein toxin saporin
Consequences of poisoning: Nausea, vomiting

8. Common soapwort (Saponaria officinalis)

99 common easter egg (Aristolochia clematitis)

The common easter lucei is also known as the upright easter lucei because of its growth shape. The plant commonly known as a weed can grow up to 100 cm high, but the axis is creeping. In our latitudes the plant shows light yellow flowers from May to June. In ancient times the common Easter lucei was used as a medicinal plant. Today you should do it as much as possible, because both roots and leaves are considered poisonous.

Toxic active ingredients: Aristolochic acid
Consequences of poisoning: Stomach ulcers, kidney damaging, carcinogenic

9.Common easter egg (Aristolochia clematitis)