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Primula ObconicaPrimula obconica

Also known as Garden Primrose · German Primrose · Poison Primrose

  • Type: Herb
  • Sunlight: Bright, indirect light
  • Water: Consistent moisture
  • Temperature: Cool to moderate
  • Habitat: Indoor

Safety note: This plant may be toxic to humans and pets. See toxicity details.

Primula obconica, also known as "Primula obconica", is a flowering perennial with colorful blooms. It thrives in cooler temperatures and moderate humidity.

Primula obconica, commonly known as Primula obconica, is a species of flowering plant in the Primulaceae family. It is a popular ornamental plant, appreciated for its vibrant floral displays and ease of cultivation, making it a common sight in gardens and as a houseplant. This perennial herb typically grows as a low-lying rosette of leaves from which flower stalks emerge. The plant generally reaches a height of 15 to 30 centimeters, with a similar spread. Its leaves are ovate to broadly ovate, measuring between 5 to 15 centimeters in length, and are often slightly hairy or glandular, with a crenate or toothed margin. The most striking feature of Primula obconica is its inflorescence, which consists of an umbel of numerous flowers. These flowers are typically 2 to 3 centimeters in diameter and come in a wide array of colors, including shades of pink, red, purple, blue, and white, often with a contrasting eye. The petals are usually notched at the tip. Following flowering, small, ovoid capsules develop, containing numerous small seeds. Primula obconica is native to the mountainous regions of central and southwestern China, specifically found in provinces such as Sichuan, Yunnan, and Guizhou. It thrives in its natural habitat in moist, shaded environments, often growing in forests, along stream banks, and on rocky slopes at elevations ranging from 1,200 to 3,000 meters. In cultivation, it prefers well-drained, fertile soil and partial shade, avoiding direct, intense sunlight which can scorch its leaves. It benefits from consistent moisture but dislikes waterlogged conditions. While it can be grown outdoors in suitable climates, it is often cultivated as a cool-season houseplant, requiring temperatures between 10 to 18 degrees Celsius for optimal flowering. The primary importance of Primula obconica lies in its ornamental value. Its prolific blooming and diverse color palette make it a favored choice for adding color to shaded garden beds, containers, and as a cheerful indoor plant during the cooler months. While not widely recognized for medicinal, culinary, or economic uses, its aesthetic appeal has led to extensive breeding and selection for horticultural purposes, resulting in numerous cultivars with enhanced flower size, color intensity, and plant vigor. An interesting characteristic of Primula obconica is that some individuals may possess glandular hairs on their leaves and stems that can cause a mild skin irritation or allergic reaction in sensitive people, a phenomenon sometimes referred to as "primula dermatitis." This is due to the presence of certain compounds within these glands. Despite this, its widespread cultivation continues due to its captivating beauty and its ability to brighten indoor spaces and garden corners with its vibrant and abundant blooms.

Photograph © 江国彬 · CC-BY-NC

Primula Obconica Care Summary

At-a-glance light, water, soil, and growing conditions from plant data

Light

Bright, indirect light

75% intensity

Avoid direct sunlight, which can scorch leaves. Prefers a bright windowsill.

Watering

Consistent moisture

75% intensity

Avoid waterlogged soil; allow top layer to dry slightly.

Soil

Well-drained, fertile potting mix

50% intensity

Temperature

Cool to moderate

50% intensity

Prefers temperatures between 10-18°C. Avoid extreme heat.

Habitat

Indoor

50% intensity

Fertilizer

Regular feeding during growth

50% intensity

Use balanced liquid fertilizer diluted by half during spring and summer.

Primula Obconica Toxicity

Safety information from plant toxicity data

Toxicity details for Primula Obconica
AttributeValue
Toxic for humansYes

3/5 intensity

Toxic for petsYes

3/5 intensity

EdibleNo

Irritant

Primula Obconica Quick Facts

Key traits and growing stats from plant data

Plant Type
Herb
Plant Place Type
Pot, Garden
Plant Environment
Indoor
Lifespan
Perennial
Plant Height
0.1-0.3 m
Spread
0.1-0.3 m
Growth Rate
Moderate
Dormancy
Semi-dormant
Leaf Color
Green
Leaf Type
Simple
Flower Size
2-3 cm
Optimal Sunlight Lux
1500

Care guide for Primula Obconica

Watering, pruning, propagation, and repotting details from plant data

Water

Keep the soil consistently moist but not waterlogged. Allow the top centimeter of soil to dry out slightly between waterings. Reduce watering in winter to prevent root rot, but do not let the plant dry out completely.

Ensure good drainage to avoid standing water.

Pruning

Deadhead spent flowers regularly to encourage more blooms and maintain a tidy appearance. Remove any yellowing or damaged leaves as they appear.

Pruning is generally minimal for this plant, focusing on removing spent growth to promote health and flowering.

Propagation

Primula obconica is typically propagated by seed sown in autumn or early spring. Seeds require light to germinate, so do not cover them.

Alternatively, division of established clumps can be done in early spring after flowering has finished.

Repotting

Repot your Primula obconica every 1-2 years, preferably in early spring after flowering. Use a well-draining potting mix. Choose a pot that is only slightly larger than the current one.

This helps prevent overwatering and promotes healthy root development.

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Flowering & Fruiting Cycles

Monthly activity intensity for bloom and fruit across both hemispheres.

Northern hemisphere

Flowering & fruiting calendar

Peak bloom · MarPeak fruit · May
FloweringFruiting
02468JanFebMarAprMayJunJulAugSepOctNovDecActivity intensityMonths822
Southern hemisphere

Flowering & fruiting calendar

Peak bloom · JunPeak fruit · Sep
FloweringFruiting
02468JanFebMarAprMayJunJulAugSepOctNovDecActivity intensityMonths822

Primula Obconica Names & Synonyms

Common names and botanical synonyms

Common Names

  • Garden Primrose
  • German Primrose
  • Poison Primrose
  • Primrose
  • Primula
  • Top Primrose

Synonyms

  • Auganthus obconicus (Hance) Soják

Primula Obconica Taxonomy

Botanical classification

Taxonomic classification of Primula Obconica
RankName
kingdomPlantae
divisionTracheophyta
classMagnoliopsida
orderEricales
familyPrimulaceae
genusPrimula
speciesPrimula obconica

Primula Obconica FAQs

Answers based on plant encyclopedia data

What are the light requirements for Primula obconica?

Primula obconica prefers bright, indirect light. Direct sunlight can scorch its leaves.

How often should I water Primula obconica?

Water when the top inch of soil feels dry. Avoid overwatering, as this can lead to root rot.

What is the ideal temperature for Primula obconica?

This plant thrives in cooler temperatures, ideally between 10 and 18 degrees Celsius.

Why are the leaves of my Primula obconica itchy?

Primula obconica produces a substance called primin, which can cause an allergic skin reaction (dermatitis) in some people upon contact.

How can I propagate Primula obconica?

Primula obconica can be propagated by seed sown in autumn or spring, or by division of established clumps after flowering.