For dedicated houseplant collectors, discovering plants that push the boundaries of beauty, uniqueness, and strangeness is part of the thrill. If you’re keen to add a bit of the bizarre to your collection, here are 10 strange-looking houseplants that will stand out in any space. Some are rare, some just unusual, but all are sure to leave an impression.

1. Caladium ‘Scarlet’

Rarity: Rare

Care: Moderate

Caladium 'Scarlet' is a show-stopping plant with vibrant red and pink leaves, resembling stained glass. Its bold colours make it a striking addition to any plant collection. This tropical plant prefers bright, indirect light and thrives in warm, humid environments. Keep the soil consistently moist but not soggy, and avoid direct sunlight, which can scorch the delicate foliage. It goes dormant in winter, so reduce watering during this time.

2. Sansevieria trifasciata ‘Whitney’ (Snake Plant)

Rarity: Moderately rare

Care: Easy

This rare variety of the Snake Plant has uniquely variegated leaves with a silvery centre and dark green edges, giving it a bold, striking look. Sansevieria ‘Whitney’ is tough, drought-tolerant, and can thrive in low-light conditions, making it a hardy and low-maintenance option. It requires infrequent watering, and too much water can cause root rot, so it’s best to allow the soil to dry out completely between waterings.

3. Trachyandra tortilis

Rarity: Rare

Care: Moderate

This plant features broad leaves that curl or concertina out of the soil. Native to South Africa, its twisted leaves make it a whimsical addition to any collection. Trachyandra tortilis requires bright indirect light, infrequent watering, and a well-draining cactus mix. It thrives in dry, arid conditions, so ensure humidity is low and avoid keeping the roots wet.

4. Hoya Kerrii (Sweetheart Plant)

Rarity: Moderately rare

Care: Easy

Hoya Kerrii is famous for its heart-shaped leaves, which look as though they belong in a cartoon. Although it’s often sold as a single-leaf cutting, the full plant grows into a vining beauty. It thrives in bright indirect light and should only be watered when the soil dries out. Avoid direct sunlight to prevent leaf burn.

5. Albuca Spiralis (Frizzle Sizzle)

Rarity: Rare

Care: Moderate

This South African plant has curly leaves that look like they belong in a fantasy world. The "frizzle" adds character to any collection. Albuca spiralis requires bright light and well-draining soil. Water only when the soil is dry to the touch, and reduce watering significantly during dormancy, as it stores moisture in its bulb.

6. Pseudolithos

Rarity: Very rare

Care: Challenging

Pseudolithos plants look more like alien rocks than houseplants. They are extremely rare and coveted by collectors for their peculiar appearance. These desert dwellers need very bright light, minimal water, and warm temperatures. They are highly sensitive to overwatering and humidity, which makes them more challenging to care for.

7. Monstera Obliqua

Rarity: Extremely rare

Care: Difficult

Monstera obliqua, with its dramatic, lace-like leaves full of holes, is a rare and prized find for serious plant collectors. Unlike the more common Monstera deliciosa, this variety is much harder to come by. It requires high humidity, consistent moisture, and indirect sunlight. Keeping this plant thriving can be tricky, but the reward is well worth the effort.

8. Euphorbia Obesa (Baseball Plant)

Rarity: Rare

Care: Easy

Euphorbia obesa, or the Baseball Plant, has a spherical shape that resembles a green baseball. It’s slow-growing and unique in its symmetry. This plant requires plenty of light, well-draining soil, and occasional watering. Take care, as it can be toxic if ingested, so keep it away from pets and children.

9. Dioscorea Elephantipes (Elephant’s Foot)

Rarity: Rare

Care: Moderate

With a bulbous base resembling an elephant’s foot, this plant is quite the conversation starter. Its unusual woody caudex grows out of the soil and produces vining foliage. It prefers bright light and sparse watering. Ensure the soil is well-draining, and allow the caudex to dry out completely between waterings.

10. Stapelia Gigantea (Carrion Flower)

Rarity: Moderately rare

Care: Easy

Stapelia gigantea is known for its large, starfish-shaped flowers. While stunning, the flowers emit a scent reminiscent of rotting meat, which attracts flies for pollination. It thrives in bright light and requires minimal water, making it a great low-maintenance option.

Tips for Caring for Strange Houseplants:

Lighting: Many strange-looking houseplants prefer bright, indirect light. Always check the specific needs of each plant.

Watering: Overwatering is a common issue. Ensure you’re watering according to each plant’s unique needs, especially those from arid environments.

Humidity: Tropical plants may require high humidity, while succulents and desert plants prefer dry conditions.

Soil: Use well-draining soil for most rare and unusual plants to prevent root rot.

Adding these rare and strange-looking houseplants to your collection will make your indoor garden stand out. Each plant has its own distinct character and charm, bringing a touch of surprise to your space.