Eulychnia castanea spiralis


Taking on many forms and shapes, the odd Eulychnia castanea spiralis is a nursery cultivar highly sought by cactus collectors around the globe. They can take heaped and bumpy ‘monstrose’ forms, columnar hooped ‘discoidal’ forms, columnar twisting ‘spiralis’ forms, or – the holy grail for collectors – ‘cristata,’ or crested forms. We like to call them the unicorn cactus. This one takes on an architectural fan-like structure and has elements of all the other forms. All Eulychnia castanea spiralis in existence are a growing variant of the same nursery cultivated clone.

Please note: Every plant will vary in size, color and shape from the one pictured. Planter is not included. Plant ships bare root.

Eulychnia castanea spiralis is a cultivar


These cacti prefer lots of sun, at least five hours of direct sun daily. Young plants may need shade protection from afternoon sun.
Indoors, a south facing window is ideal. Outdoors, seat them in a place where they will get plenty of sun exposure, but protect them from intense, peak afternoon sun.


Eulychnia castanea spiralis prefers to stay on the dry side. In the summer, water them only when the soil has dried out entirely. Always err on the side of under watering. They are built to withstand drought, and overwatering is one of the quickest ways to kill them. During the winter, water very infrequently if at all. Water should be restricted to only enough to keep the stems and branches from shriveling.

Tula's Tip

They prefer a gritty, sharply draining mix. A cactus mix would work fine. You can amend it with sand or fine pumice up to 50% to improve grittiness and drainage. Fertilize: Fertilization of this plant is generally not necessary. If you want to refresh your soil or give your plant a boost during the growing season, you can feed it monthly with a fertilizer for cacti and succulents. Fertilize only during the spring and summer, when the plant is actively growing.


Approx. 3-4" tall x 1" at the widest point. Every plant will vary in size, color and shape.



Delivery Method

Nationwide shipping, NYC delivery and pickup available.