Long-form articles on legality, conservation, collecting, and rare cacti.
How often to water a cactus depends on the mix, the pot, the light, and the temperature, never on a calendar. The documented checks that tell you when a cactus actually needs water, the soak-and-dry method, the pot physics that set the interval, and the seasonal shifts that change everything.
The early signs of mealybugs are white cottony flecks in sheltered crevices, sticky honeydew, and ants working the plant. How to confirm them with a 10x lens before the colony blooms, read the cactus hiding spots, catch root mealybugs at the pot wall, and clear an infestation without wrecking the plant.
The early signs of spider mites are fine pale stippling, a dulled bronze cast, and moving dust on a white-paper tap test. Webbing comes late. How to confirm an infestation with a loupe and a sheet of paper, read the damage on cacti, and clear it without wrecking the plant.
Which cacti grow in Big Bend and the Trans-Pecos, when they bloom, the law on collecting, and how to see the living rock and Chisos hedgehog cactus responsibly. A conservation-first field guide from rarecactus.com.
The collector’s guide to cactus types, grouped by growth form with the light, water, and soil-ratio care each one needs: living rock, star, barrel, pincushion, hedgehog, columnar, and globular cacti, all grown from seed and checked against Kew POWO.
Most rare cactus takes four to ten years from seed to a saleable plant. Our greenhouse method, the right germination mix, and why a seed-grown specimen beats a seed packet.
A buyer’s guide to rare cactus: how to tell seed grown plants from wild-collected ones, what CITES means for collectors, the red flags of a bad seller, and the nurseries worth ordering from.
A cactus turns yellow for one of a few reasons, and where the yellow sits tells you which. Yellow and soft at the base means rot; firm and yellow on the sunny side means light stress; stippled yellow at the tips means mites. This guide diagnoses each by location and firmness, with the fix for every one.
All six Astrophytum species the way collectors actually tell them apart: the spineless star bodies, the goat-horn spines, the medusa-head tubercles, and the red-throated flowers that separate near-identical species. Plus the Japanese cultivar groups, named to current POWO taxonomy.
Echinopsis cactus types sorted into the four groups collectors actually use: globose night-bloomers, day-flowering Lobivia forms, the San Pedro columnars, and the tree-sized cardones now placed in Leucostele. Every entry carries the current POWO name, the trade names, and the traits that separate it from its neighbours.
