Devil's-tongue
Opuntia humifusa · Eastern Prickly Pear · Indian Fig · Low Prickly Pear · Smooth Prickly Pear · Eastern Prickly-pearUSDA | Grow Zone
5-10Outdoors all year in zones 5 to 10. Anywhere colder, keep it as a houseplant. Protect it below 20°F.
- Light
- Full sun, 6-8 hours
- Water
- Every 2-4 weeks
- Humidity
- 20-30%
- Temperature
- 70-100°F
- Difficulty
- Beginner
- Growth
- Moderate
- Mature size
- 2-3 ft tall, 3-4 ft wide
Opuntia humifusa, commonly known as the Eastern Prickly Pear, is a hardy cactus native to North America. Its unique pads and vibrant flowers make it a popular choice for gardens and landscapes.
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Ideal temperature
20-100°F is where it grows fastest.
Spacing and harvest
- Mature size
- 2-3 ft tall, 3-4 ft wide
- Plant apart
- 12-24 in
- Frost
- Half hardy: light frost only
Everything it needs
9 essentials at a glance
Watering
Opuntia humifusa prefers infrequent watering, allowing the soil to dry out completely between waterings.
During the growing season (spring and summer), water every 2-4 weeks, depending on humidity and temperature. In fall and winter, reduce watering to once a month or less. Signs of over-watering include yellowing pads and mushy texture, while under-watering can cause shriveling and browning edges.
Light
This cactus thrives in full sun, requiring at least 6-8 hours of direct sunlight daily.
Ideal placement includes south or west-facing windows or outdoor areas with plenty of sunlight. While it can tolerate partial shade, reduced light can lead to leggy growth and less flowering.
Soil
Opuntia humifusa prefers well-draining soil with a pH range of 6.0 to 7.5.
A cactus potting mix or a blend of potting soil, sand, and perlite works well to ensure proper drainage. Avoid heavy soils that retain moisture, as this can lead to root rot.
Humidity
This plant thrives in low humidity environments, ideally between 20-30%.
To increase humidity, consider placing a humidity tray nearby or misting occasionally, but avoid excessive moisture. Signs of humidity stress include browning tips and slow growth.
Temperature
Opuntia humifusa prefers temperatures between 70-100°F (21-38°C) during the growing season and can tolerate cooler temperatures down to 20°F (-6°C) during dormancy.
It is hardy in zones 5-10, making it suitable for a variety of climates, but protect from frost.
Fertilizing
Use a balanced cactus fertilizer with an NPK ratio of 10-10-10 or 5-10-10 during the growing season, applying every 4-6 weeks.
Reduce or stop fertilizing in fall and winter. Signs of nutrient deficiency include pale pads and stunted growth.
Pruning
Pruning is generally not necessary, but you can remove any dead or damaged pads with clean, sharp tools.
This should be done in spring to promote healthy growth. Always wear gloves to protect against spines.
Repotting
Repot Opuntia humifusa every 2-3 years or when it outgrows its pot, indicated by roots growing out of the drainage holes.
Choose a pot that is 1-2 inches larger in diameter. Carefully remove the plant, refresh the soil, and place it in the new pot, ensuring it is stable.
Propagation
Propagation can be done through stem cuttings or seeds.
For stem cuttings, take a healthy pad, let it dry for 1-2 days to callous, then plant in well-draining soil. Water sparingly until roots develop, usually within a few weeks. Seed propagation involves planting seeds in a cactus mix and keeping them warm and moist until germination.
When it's unhappy
Yellowing pads
Why it happens
Over-watering or poor drainage.
How to fix it
Reduce watering frequency and ensure the pot has adequate drainage holes.
Shriveling pads
Why it happens
Under-watering or excessive heat.
How to fix it
Increase watering frequency and ensure the plant is not exposed to extreme temperatures.
Root rot
Why it happens
Sitting in waterlogged soil.
How to fix it
Remove the plant from the pot, cut away affected roots, and repot in fresh, dry soil.
Leggy growth
Why it happens
Insufficient light.
How to fix it
Move the plant to a brighter location with more direct sunlight.
Pest infestation (e.g., mealybugs)
Why it happens
Poor air circulation and high humidity.
How to fix it
Treat with insecticidal soap or neem oil, and improve air circulation.
Care through the year
Spring
In spring, resume regular watering and fertilizing as the plant begins its active growth phase. Check for any signs of pests or disease.
Summer
During summer, ensure the plant receives plenty of sunlight and water every 2-4 weeks. Monitor for signs of heat stress.
Fall
In fall, gradually reduce watering as the plant prepares for dormancy. Stop fertilizing and check for any remaining pests.
Winter
In winter, water sparingly, allowing the soil to dry out completely. Keep the plant in a warm location, away from drafts.
Toxicity & Safety
Opuntia humifusa is non-toxic to pets and children. However, the spines can cause injury if touched, so caution is advised when handling.
Good to know
How often should I water my Opuntia humifusa?
Water your Opuntia humifusa every 2-4 weeks during the growing season, allowing the soil to dry out completely between waterings.
What kind of light does Opuntia humifusa need?
This cactus thrives in full sun, requiring at least 6-8 hours of direct sunlight daily for optimal growth and flowering.
How do I propagate Opuntia humifusa?
You can propagate Opuntia humifusa through stem cuttings or seeds. For cuttings, let the pad callous for a few days before planting in well-draining soil.
What temperature is best for Opuntia humifusa?
Opuntia humifusa prefers temperatures between 70-100°F (21-38°C) and can tolerate cooler temperatures down to 20°F (-6°C) during dormancy.
Why are my Opuntia humifusa pads turning yellow?
Yellowing pads are often a sign of over-watering or poor drainage. Reduce watering and ensure the pot has adequate drainage.
When should I repot my Opuntia humifusa?
Repot your Opuntia humifusa every 2-3 years or when you notice roots growing out of the drainage holes of the pot.
Is Opuntia humifusa safe for pets?
Yes, Opuntia humifusa is non-toxic to pets and children, but be cautious of its spines when handling.
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