PHK Ceramics · Knowledge Hub

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& Create.

A growing library of guides on cactus, succulents, bonsai, soil and handmade pottery — written in the studio, tested on the bench.

Featured · Sep 2026

North American Hardy Cactus: Yes, You Can Grow Cactus in Minnesota

Think you can’t grow cactus in Minnesota? Think again. While our winters can be brutal, several North American cactus species are surprisingly cold hardy and can survive well below freezing. The real challenge isn’t always the cold—it’s winter moisture. In this guide, we’ll look at some of the toughest cactus species for Zone 5 and colder, how they handle Midwest winters, and what you can do to give them the best chance of thriving year after year.

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A collection of mesembs displayed in handcrafted ceramic pots, showcasing the incredible diversity of this fascinating family of South African succulents—from tiny living stones to sculptural branching species.

Aug 2026 · 5 min read

Mesembs: The Extraordinary Succulents That Don't Look Real

Mesembs are some of the most fascinating succulents in the world, known for their stone-like appearance and incredible adaptations. Learn what defines this unique group of plants, explore popular genera, and discover how to help them thrive.

A diverse collection of Haworthias showcasing the remarkable variety within the genus—from translucent windowed species to bold zebra-patterned forms—all thriving in fast-draining mineral soil and handcrafted ceramic pots.

Aug 2026 · 5 min read

Genus Spotlight: Haworthia

Haworthia are beloved for their striking leaf patterns, compact size, and easy-care nature. Discover popular species, learn how to grow them successfully, and find out why these South African succulents have become favorites among collectors and beginners alike.

Aug 2026 · 5 min read

Genus Spotlight: Thelocactus

Thelocactus are sculptural desert cacti prized for their dramatic spines, striking ribs, and oversized flowers. Discover what makes this Mexican genus unique, explore popular species, and learn how to grow these collector favorites with confidence.

Aug 2026 · 5 min read

Choosing the Right Bonsai Pot for Cactus, Succulents & Caudex Plants

Bonsai pots aren't just for trees. Discover how the right ceramic pot can enhance cactus, succulents, and caudex plants while promoting healthy growth and creating stunning, natural displays.

A collection of Mammillaria cacti displaying the genus' remarkable diversity in spine patterns, growth forms, and clustering habits. Native to Mexico and the southwestern United States, these compact cacti are among the most rewarding species for collectors.

Aug 2026 · 5 min read

Genus Spotlight: Mammillaria

Mammillaria is one of the largest and most diverse cactus genera, loved for its compact size, unique spine patterns, and colorful ring of flowers. Discover what makes these charming cacti so popular, explore notable species, and learn how to grow them successfully in your own collection.

Lithops growing naturally among quartz rocks in South Africa, where these remarkable living stone succulents have evolved to blend seamlessly into their desert habitat.

Aug 2026 · 5 min read

Genus Spotlight: Lithops

Lithops, or Living Stones, are among the world's most fascinating succulents. Learn how these remarkable plants survive in the wild, understand their unique growth cycle, and discover the care tips that will help them thrive in your collection.

Aug 2026 · 5 min read

Genus Spotlight: Astrophytum

Astrophytum are among the most iconic collector cacti, prized for their star-shaped forms, white flecking, and brilliant yellow flowers. Learn about popular species, growing tips, and why these living sculptures have captivated collectors around the world.

Jul 2026 · 5 min read

How to Choose the Right Pot Size for Your Cactus (A Complete Guide)

Choosing the right pot size is one of the most important—and most overlooked—parts of growing healthy cacti. A pot that's too large can hold excess moisture and increase the risk of root rot, while one that's too small can restrict healthy root growth. In this guide, you'll learn how to choose the perfect pot size for your cactus, why drainage and pot shape matter, and how the right combination of a handmade ceramic pot and a well-draining soil mix can help your plants thrive for years to come.

Trichodiadema Densum bonsai in a handmade ceramic stoneware pot

Jul 2026 · 5 min read

Succulent Bonsai: The Beauty of Bonsai Without the High Maintenance

Discover the best plants for succulent bonsai, including jade, elephant bush, Adenium, Fokea, and more. Learn how to create beautiful, low-maintenance bonsai using handmade ceramic pots.