Hollyhock plant image
Malvaceae HERB OUTDOOR Placement Primary: Ornamental Medicinal Other

Hollyhock

Alcea rosea

Identified By Marcs

The hollyhock, scientifically known as Alcea rosea, is a magnificent and towering flowering plant belonging to the mallow family, Malvaceae. Renowned for its exceptionally tall, unbranched spikes, this iconic garden favorite can easily reach heights of over two meters, producing a stunning vertical display of large, saucer-shaped blossoms in an array of vibrant colors including pink, red, yellow, purple, and white. Typically grown as a biennial or short-lived perennial, hollyhocks are deeply rooted in cottage garden traditions, serving as a striking backdrop along fences, walls, and borders. They attract a wide variety of pollinators, particularly bees and butterflies, making them an ecologically valuable addition to any landscape while offering historic charm and dramatic visual impact.

Also known as: Common Hollyhock Garden Hollyhock

Toxicity & Safety

Is Hollyhock toxic to pets?

No, Hollyhock is generally safe for pets.

Is Hollyhock toxic to humans?

No, Hollyhock is generally safe for humans.

Is Hollyhock safe during pregnancy?

Generally considered safe during pregnancy.

Growth & Dimensions

Height 150 - 250 cm
Width 45 - 90 cm
Growth Rate Fast
Care Level Easy
Lifespan Biennial

Ideal Environment

Temperature -15°C - 35°C
Sunlight Hours 6 - 10 hrs/day
Sun Exposure Full sun
Soil pH 6 - 7.5
Watering Interval 5 - 10 days
Humidity 40.00% - 70.00%
USDA Zone 3 - 9

Temperate Garden Zones

Climate: Thrives wonderfully in temperate climates with moderate rainfall, warm summers, and distinct seasonal changes without excessively high humidity.

Soils: Loam Chalk Sand
Annual Rainfall: 600 - 1200 mm

Native Regions

Middle East
Eastern Mediterranean
Southwestern Asia
Southwest Asia

How to Care for Hollyhock

How should I handle consistent watering practices?

Water your hollyhocks deeply and regularly at the base of the plant to keep the soil consistently moist but never waterlogged. Avoid overhead watering as wet foliage easily promotes fungal diseases like rust. Ensure the surrounding earth drains effectively after heavy rainfall.

How should I handle optimal sunlight and location?

Plant your hollyhocks in a location that receives full, direct sunlight for at least six to eight hours every day. Because of their towering height, choose a spot that is sheltered from strong, damaging winds or provide sturdy stakes to keep them upright.

How to Propagate Hollyhock

How to propagate Hollyhock by seed?

Collect mature seeds from dry seed pods at the end of the summer season. Sow the seeds directly into well-prepared garden soil in late summer or early autumn, pressing them lightly into the surface as they require light to germinate successfully. Alternatively, start seeds indoors in individual pots during early spring before transplanting them outdoors after the final frost date has safely passed. Keep the soil moderately moist throughout the germination period.

Common Diseases & Pests of Hollyhock

What is Hollyhock Rust and how is it treated?

Fungal
Symptoms:

Yellowish or pale spots appear on the upper surface of the leaves, while prominent reddish-brown or orange pustules develop on the undersides. Severe infections cause leaves to turn brown, wither prematurely, and severely weaken the overall vigor of the plant.

Treatment:

Immediately prune and destroy heavily infected leaves to stop the spread. Apply a copper-based fungicide or a sulfur spray according to label instructions, ensuring you thoroughly coat both the top and underside surfaces of all remaining foliage.

Prevention:

Provide adequate spacing between individual plants to maximize air circulation. Water strictly at the base in the early morning to minimize leaf wetness, and clear away all dead plant debris at the end of the growing season.

Properties & Benefits of Hollyhock

Bears Fruit Used for Tea/Tisane

Uses & Health Benefits

What are the benefits of soothing herbal infusions in Hollyhock?

Hollyhock flowers contain high concentrations of mucilage, a gel-like substance that has traditionally been used to soothe irritated mucous membranes in the throat and digestive tract. Brewed as a warm herbal tea, the dried petals can help alleviate minor symptoms associated with dry coughs, sore throats, and mild inflammation, offering gentle holistic relief.

Precautions: Consult a healthcare professional before consuming herbal teas if you are pregnant, nursing, or taking prescription medications.

Key Nutrients / Compounds

Mucilage rich in High mucilaginous content
Plant Mucilage rich in High mucilage content in flowers and roots

OTHER PLANTS

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Baseball Plant

Baseball Plant

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Devil's Backbone

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Moses-in-the-Cradle

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Copperleaf

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Persian Shield

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Scarlet Star Bromeliad

Scarlet Star Bromeliad

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Blushing Bride Bromeliad

Blushing Bride Bromeliad

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Queen's Tears

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Spanish Moss

Spanish Moss

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Waterwheel Plant

Waterwheel Plant

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Common Butterwort

Common Butterwort

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California Pitcher Plant

California Pitcher Plant

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Cape Sundew

Cape Sundew

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Colchicum

Colchicum

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Bellflower

Bellflower

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False Castor Oil Plant

False Castor Oil Plant

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Velvet Leaf Anthurium

Velvet Leaf Anthurium

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Alocasia Polly

Alocasia Polly

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Eggplant

Eggplant

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Okra

Okra

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Winged Bean

Winged Bean

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Cassava

Cassava

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Crocosmia

Crocosmia

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