Dahlia Apple Cactus

Dahlia Apple Cactus Care

Echinocereus poselgeri

What is the plant

Echinocereus poselgeri, also known as the dahlia cactus, is a species of Echinocereus. It is native to Coahuila and southern Texas.

Echinocereus poselgeri is a shrubby cactus, initially erect, later sprawling or clambering. The stem is very tall and slender, dark colored up to 4 feet (1.2 m) long and up to 0.8 inch (2 cm) in diameter. The spines are tan-grayish white. The flowers are pink rose to pink-purple. Echinocereus poselgeri is a cactus that has undergone some name changes. Originally named Wilcoxia poselgeri by Britton&Rose, it later became Cereus poselgeri.

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Humidity

Normal

Lighting

Full Sun

Temperature

-5°C - 10°C

Hardiness zone

9b - 10b

Difficulty

Medium

Hibernation

Cold Period

How to Care for the Plant

Water
The plant is drought-tolerant and suitable for xeriscaping. It needs moderate watering. Avoid overwatering.
Fertilizer
A weak fertilizer formulated for cacti and succulents can be used during the growing season.
Sunlight
Best in full or partial sun exposure. In mild climate they grow well when planted freely outside.

Disease diagnosis

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Soil
The soil has to be well-draining.
Temperature
They need to be kept in a cool, dry place during winter rest (at -5 +10°C). This is important for the flowers as well as for their health. Without this cool winter period they normally won't get any buds. It is quite frost hardy down to -7(-10)°C.
Container
The cactus can be grown in a pot that can be brought inside during the dormant period. Make sure the container has enough drainage holes.