Araceae
Bog Arum (Calla palustris)
Calla palustris
An aquatic plant that thrives in waterlogged soil or shallow standing water. Needs partial shade, high humidity, and acidic organically rich soil. Slow-growing and very cold-hardy (zones 2a–6b).
Every 7 days
Partial shade
5° - 32°C
70% - 100%
Categories
What is Bog Arum?
Bog Arum (Calla palustris) is a medium-care plant from the Araceae family. Calla palustris, commonly known as Bog Arum or Wild Calla, is an aquatic perennial in the Araceae family. Native to the northern temperate zones of Eurasia and North America, it grows at the margins of lakes, bogs, and wetlands. It produces an elegant white spathe in spring-summer. The entire plant...
Bog Arum grows up to 40cm, with spread of 30cm, watering every 7 days, 5°C – 32°C, 70–100% humidity. It is not suitable for indoor environments and not safe for pets.
Without precautions, ingestion can cause irritation in pets. Keep out of reach of cats and dogs.
How to Care for Bog Arum?
TLDR: Bog Arum needs Partial shade, watering every 7 days, and temperatures between 5-32°C with 70-100% humidity.
How Often Should You Water Bog Arum?
Keep soil permanently moist or submerged in up to 2 inches of water. Water deeply every 7 days at minimum; never allow the substrate to dry out.
How Much Light Does Bog Arum Need?
Prefers partial shade with 4–6 hours of direct sunlight daily. Avoid intense midday sun which can scorch the leaves.
What Is the Best Soil for Bog Arum?
Clay-peaty, acidic (pH 5.5–7.0), humus-rich soil. Ideal for water gardens and pond edges.
What Pot Should You Use for Bog Arum?
Clay aquatic planter or wide container kept permanently moist.
Care Schedule
Fertilize
Every 30 days
What Is Bog Arum and Where Does It Come From?
Calla palustris, commonly known as Bog Arum or Wild Calla, is an aquatic perennial in the Araceae family. Native to the northern temperate zones of Eurasia and North America, it grows at the margins of lakes, bogs, and wetlands. It produces an elegant white spathe in spring-summer. The entire plant contains calcium oxalate crystals and is toxic if ingested.
How Big Does Bog Arum Grow?
TLDR: Bog Arum can reach up to 40cm tall with Slow growth rate.
Max height
40cm
Spread
30cm
Growth rate
Slow
Foliage
Deciduous
Warning: Toxic Plant
This plant can be toxic if ingested. Keep out of reach of:
Plant Uses
Ornamental
Great for decoration
Is your plant showing symptoms?
Click on the symptom to discover possible causes:
What Diseases Commonly Affect Bog Arum?
TLDR: Bog Arum is susceptible to 4 known diseases. Monitor regularly for early detection.
Root Rot
Root rot is a serious fungal disease that affects the root system of plants, causing them to decay and die. It is primarily caused by overwatering, poor drainage, or soil-borne fungi such as Pythium, Phytophthora, Rhizoctonia, and Fusarium. The disease thrives in waterlogged conditions where roots are deprived of oxygen, making them susceptible to fungal infection.
Overwatering
Overwatering occurs when plants receive too much water, depriving roots of oxygen and causing root rot. This environmental stress is one of the most common causes of houseplant death, as waterlogged soil prevents roots from breathing and functioning properly.
Aphids
Aphids are small, soft-bodied, pear-shaped insects (1/16 to 1/8 inch long) that feed by sucking nutrient-rich sap from plants. They reproduce rapidly and can quickly weaken plants, causing distorted growth and transmitting plant viruses. Aphids come in various colors including green, black, red, yellow, brown, and gray. They secrete honeydew, a sticky substance that attracts ants and encourages sooty mold growth.
Spider Mites
Spider mites are tiny arachnids (less than 1/20 inch long) related to spiders and ticks that feed on plant sap. They thrive in hot, dry conditions and can cause significant damage to ornamental and vegetable plants. During severe infestations, crop losses can reach 14% or higher as these pests disrupt vital plant processes including photosynthesis, carbon dioxide absorption, and transpiration.
Meaning & Symbolism
Symbol of purity and wild beauty in the wetlands of the northern temperate hemisphere.
Fun Facts
Calla palustris can grow in up to 2–4 inches of standing water, making it perfect for water gardens.
Its bright red berries are highly ornamental in autumn but toxic if eaten raw.
One of the few temperate plants that tolerates permanently flooded zones.
Frequently asked questions
Is Bog Arum toxic to pets?
Can I grow Bog Arum in a pot?
When does Bog Arum flower?
Compare with similar plants
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|---|---|---|---|---|
| Peace Lily | Easy | Low light | 4d | ⚠️ |
| Swiss Cheese Plant | Easy | Partial shade | 10d | ⚠️ |
| Golden Pothos | Easy | Low light | 8d | ⚠️ |
| ZZ Plant | Easy | Low light | 18d | ⚠️ |