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Heartleaf nettle
Also known as: Slim Stinging Nettle, Heartwhole Nettle
Nettles are known for their stinging hairs, and heartleaf nettle is no different. This flowering plant can cause an uncomfortable rash if you happen to brush up against it. It produces small green flowers that attract butterflies, and its fibers can be used to make clothes.
Scientific classification
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Toxic to Humans
Toxicity
15 cm to 80 cm
Plant Height
20 cm to 30 cm
Spread
2.5 cm
Flower Size
Yellow, Green
Flower Color
Deciduous
Leaf type
20 - 35 ℃
Ideal Temperature
Summer
Growth Season
Moderate
Growth Rate

Images of Heartleaf nettle

Culture

Symbolism
Exorcism, Protection, Healing
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Toxicity

Heartleaf nettle is a toxic plant with tiny nettles that contains chemical toxins like formic acid, causing skin irritation and potentially severe symptoms if ingested or inhaled, especially for asthma or C.O.P.D. patients. Symptoms include itchy, burning sensation, redness, and swelling. Precautions are essential for people with pre-existing conditions.
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Quickly Identify Heartleaf nettle

1
Heart-shaped leaves with stinging trichomes and toothed margins, resembling mint.
2
Opposite leaves with visible veins, measuring 1-2.5 inches (2.5-6.5 cm) long.
3
Flattened egg-shaped fruit with brown color, enclosed by bract-like structures.
4
Green to red stem with branching patterns, covered in stinging hairs.
5
Minute greenish to whitish flowers in spherical clusters, wind-pollinated from March to November.
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Care Guide for Heartleaf nettle

Every week
Water
Full sun
Sunlight
20 - 35 ℃
Ideal Temperature
Water: Heartleaf nettle thrives in moist conditions, requiring consistent hydration with evenly moist soil. It benefits from weekly watering and is typically grown outdoors. This robust herbaceous perennial adapts well to seasonal rainfall, ensuring adequate moisture without the risk of over-saturation.
Fertilize: For heartleaf nettle, use balanced nutrition fertilizers for healthy growth. Apply high nitrogen fertilizers monthly during growth, but reduce feeding in dormancy. Use gloves to avoid skin irritation. No fertilization is needed in winter, enhancing heartleaf nettle's vitality and promoting a thriving growth cycle.
Pruning: Distinctive for its heart-shaped leaves and stinging hairs, heartleaf nettle requires early to late spring pruning to promote growth and prevent overgrowth. Trim dead stems by one-third for new shoots, improving air circulation and disease resistance. Wear gloves to avoid skin irritation.
Propagation: Heartleaf nettle is a vigorous perennial that reproduces through sowing. Gardeners should use fresh seeds and a well-draining medium, keeping soil damp for germination. Once seedlings are established, transplant carefully. Regular watering and partial shade are essential for healthy growth post-transplant.
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