Espostoa guentheri (synonym Vatricania guentheri) is a shrubby columnar cactus with attractive golden-spined stems that exhibit varying densities of woolly hairs grown on the sides of the branches from which comes flowers and fruits.
Espostoa guentheriis known from a rather small area is Eastern Bolivia. It occurs in seasonally dry forest vegetation within an inter-Andean valley, often covering a hillside, or forming a cactus forest with other species. The area is dry and hot at times, but wet enough to support leafy trees and shrubs. Espostoa guentheri is quite common where it occurs. Ongoing road construction in the southern end of its range is reducing the population, but there are currently no other known threats. Espostoa guentheri was placed in its own genus Vatricania because it occurs in eastern Bolivia whereas all the Espostoas occur in Peru.
In the growing season, the plants should be watered at least once a week. When watering, the soil should be given a good soaking, allowing excess water to drain away. Allow the compost to dry out slightly between each watering.
Cacti require a porous, sandy or pebbly potting soil that provides plenty of aeration and excellent drainage. A good cactus potting mixture will also consist of some organic material that makes moisture available to the plant roots when watered but then dries out quickly.
Cacti fertilizer requirements are pretty simple. Any good houseplant food (diluted to half) that's higher in phosphorus than nitrogen is a good choice. A 5-10-5 solution can work well.
Any dying or yellowing leaves can be removed for aesthetic reasons, while any small leaves that grow off the main trunk, often called suckers, should be removed.
It is hard as low as 0 °C (or less) but it is best a warm habitat. So, a minimum of 10°C should be maintained to avoid marking of the stem.
Ceramic pots are the most popular type of containers for houseplants today. You'll find them in all kinds of styles, colors, and sizes. At one time, the clay pot was the most common container for indoor plants. When choosing a pot, choose a pot that is 2.5-5 cm (1-2”) larger than the current size.
