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Because the height of plants varies, we use the width of the planters they come in for size.
Approximately 5" in diameter, fits plants in a 4" grow pot or smaller
Approximately 7" in diameter, fits plants in a 6" grow pot or smaller
Approximately 10-12" in diameter, fits plants in a 10" grow pot or smaller
Approximately 12-14" in diameter, fits plants in a 12" grow pot or smaller
Our planters are made from the highest quality materials, and designed to complement a range of styles.
Porcelain PlantersIncludes drainage hole and matching saucer
No drainage hole; use as cache pot or add lava rocks
Includes drainage hole & matching saucer
Plastic container with drainage holes used by our greenhouse
Tell us your location so we can recommend the plants and trees best suited for your climate.
Growing ZoneEnter a valid zip code
With coral-like curves and striking form, the Mermaid Tail Cactus is a rare, easy-care plant that thrives in bright light.
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Measure moisture, pH levels, and light
The Euphorbia Lactea Crested 'Mermaid Tail', also referred to as 'Coral Cactus', is a uniquely shaped succulent prized for its intricate, crested growth pattern that mimics the elegant tail of a mermaid. This rare cultivar thrives in bright light and is perfect for those seeking a distinctive, conversation-starting piece to their rare plant or cactus collection. Choose from vibrant green or mystical purple!
Note: Our cacti aren’t cuttings—they’re fully rooted plants! This means they’re already established and ready to thrive in their new home. Succulents naturally have shallow roots, so don’t be surprised if that’s what you see, it’s a completely natural trait!
Your plants will arrive in happy, healthy condition—guaranteed. If not, we replace them for free. Learn more about our guarantee.
We offer free standard shipping on all orders $99+. Orders under $99 ship for a flat $15 fee. View our full shipping policy.
The Sill offers a variety of plant care workshops for beginners, experts, & everyone in between! No questions too small or too silly! View upcoming schedule.
Chat directly via video with a knowledgeable houseplant expert from The Sill team about plant-specific care, repotting tips and tricks, pest identification, and more. Schedule an appointment today.

The Euphorbia Lactea Crested 'Mermaid Tail', also referred to as 'Coral Cactus', is a uniquely shaped succulent prized for its intricate, crested growth pattern that mimics the elegant tail of a mermaid. This rare cultivar thrives in bright light and is perfect for those seeking a distinctive, conversation-starting piece to their rare plant or cactus collection. Choose from vibrant green or mystical purple!
Note: Our cacti aren’t cuttings—they’re fully rooted plants! This means they’re already established and ready to thrive in their new home. Succulents naturally have shallow roots, so don’t be surprised if that’s what you see, it’s a completely natural trait!
Gifting has never been easier
Enter your message and select when to send it.