12 Amazing Things You Should Know about Genus Echinocereus

Known for their vibrantly colored flowers, the Echinocereus cacti, popularly known as Hedgehog cacti due to their dense spines and round shape that resemble a hedgehog a lot, are good things in small packages. Attaining a height of not more than a foot (30cm) and a diameter of 2-3 inches (5cm-7.5cm), these cacti form large mounds of hundreds of stems in the wild, but are quite manageable in cultivation. Ranging from the fiercest spines covering the stem fully and making it invisible to moderately sized spines to very colorful spines to pectinate (comb-like) spines, the spination in Echinocereus show a tremendous variety. All in all, genus Echinocereus has some wonderful cactus species up its sleeves that can tempt any plant lover to grow them in their garden, whether indoors or outdoors.

1. Habitat

The habitat of Echinocereus cacti is spread from South Dakota, USA in the north to most of Mexico in the south. They grow in a wide range of habitats such as under Panderosa forests to coastal plains, low elevation deserts and mountains of 8000 feet (2438m) of height or even more.

2. How do you identify Echinocereus?

Genus Echinocereus has got a great amount of variation within its species which can make identification quite challenging in some situations.

3. Life and Growing Habit

If an Echinocereus cactus gets ideal conditions, it can live for minimum 10 years. But it’s a slow grower. But it grows consistently each year in good conditions.

4. How to grow

The cylinder-shaped Echinocereus cacti are relatively easy to grow and thrive in rocky areas under bright sun in USDA Hardiness Zones 5 to 11. So, they are quite ideal plants for beginners being easy to grow and low maintenance. They love high summer temperatures, but are pretty cold tolerant if dry. Some species are hardy even to well less than 0-degree F (-18-degree C), but need to be dry to survive. These cacti live for many years in an ideal climate and have a slow growth rate. Ideal season to plant them is the spring, once the weather has warmed up.

Soil

The soil for growing Echinocereus cacti should be loose and sandy with good drainage. If you want to grow it as a container plant, use a potting mix designed particularly for cacti and succulents.

Light

Echinocereus cacti love direct full sun for minimum six hours on most days to grow to their best and produce best flowers. Although they can tolerate a little shade, you may get reduced flowering. Therefore, if you grow an Echinocereus cactus indoors, place it near the brightest window, most preferably a south-facing window.

 

 

Water

While the requirement for water differs a bit among the Echinocereus species, at large the species in this genus don’t need much of water to flourish. In fact, too much water can cause root rot, especially if the drainage is not good, and also during winter months when the plants undergo dormancy and need less water. The soil should dry out between waterings. Unless the plant has received rainfall, water around two weeks from spring to fall. Reduce watering to monthly over the winter.

Temperature

There is a variety in temperature needs too in the Echinocereus species. Many of these species are tolerant to cold even up to freezing temperatures. Generally speaking, they need indoor temperatures above 50-degree F (10-degree C) to thrive.

Fertilizer

While Echinocereus cacti don’t require nutrient-rich soil, they like extra nutrients. Feed them in the spring after they emerge from the winter dormancy with a liquid cactus fertilizer. Follow the instructions on the label. There is no need to fertilize for the rest of the year.

5. Common Pests and Diseases in Echinocereus Cacti

Common pests on Echinocereus cacti are aphids, scale and mealybugs. They damage the flesh and roots. Their presence is indicated by white deposits or black mold. Threat them with an insecticide as early as possible. Replant container plants in fresh soil. You can treat small infestations successfully with an organic plant pest spray like neem oil or horticultural oil.

Root Rot: Take care not to overwater Echinocereus cacti as their root system is very weak and is prone to root rot. Between waterings, make sure the plant is completely dry.

Stunted Growth: If you see your plant has started to shrivel or is not growing, it may need more water, if kept indoors, it may need frequent watering, particularly in the dry or hot weather. So, water it thoroughly. Even in outdoor plants, you need to water thoroughly if the weather is hot and dry and a lot of time has passed between waterings.

Stem Rot: Echinocereus can develop stem rot too if it gets excessive water and not much of sunlight and heat. If you see yellowing, blackening or browning stem, remove the plant from the container. If roots are browned or blackened, cut them off with sterilized scissors. If the stem’s bottom is blackened or browned, it’s probably unrecoverable and should be disposed of.

Hardened, Browned Plant Flesh: Browned and hardened stem indicates the plant’s natural aging process. It’s called corking. Providing it’s not mushy, the plant should revive. Water the plant regularly but avoid overwatering. Also, make sure it gets ample light, but if the plant is scorched in full sun, move it to shade.

6. Propagation

Propagating Echinocereus from seeds

Buy high-quality Echinocereus seeds from a reputed website like Unusual Seeds and shallowly plant them in the spring. The soil should be sandy and hardly moist, which you should fill to the halfway point in small plastic cups to start with.

Place the sown seeds in a warm spot. Germination can take around 2 weeks.

Once germinated, repot seedlings in larger containers.

From Offsets

You can propagate Echinocereus cacti even from offsets.

Use heavy gardening gloves while propagating from offsets to protect your hands from the prickly spines. Keep an ideal planting spot or container and cactus mix ready.

Pull the plant out of the ground or container carefully and then pull out an offset (a small plant grown on a mature plant). The offset should have some roots attached.

You should let the offset dry out in open air and allow it to callous over the cut end for a few days.

Now plant the offset in the spot in your garden you have selected for it or in the container in the cactus potting mix. Place the pot in a warm, sunlit position. Take care to keep the soil barely moist until a new growth forms.

7. Which Container Should You Choose?

If you plant your cactus in a container, make sure the container is shallow because Echinocereus cacti don’t have deep roots. Prefer an unglazed container with drainage holes so the excess moisture can escape through its walls.

8. Repotting

Echinocereus cacti, being slow-growing, don’t need frequent repotting. Only if the roots grow out of the pot and the plant turns too top-heavy for its container, move it to a slightly bigger container. However, make sure you remove it from the old container very carefully, as Echinocereus cactus roots tend to be very weak. Knock off any loose soil very gently and then plant it in the new container at the same depth as in the old container. Now fill it around with fresh cactus potting mix.

9. Overwintering for Great Blooming

If you have grown an indoor cactus, you need to overwinter it if you wish to have great blooms. Keep it cool and relatively dry in winter, and just above freezing, i.e. between 35 and 44-degree F (1.66- and 6.66-degree C).

Overwintering outdoors in zones 5 through 10 may make the cactus shrivel up to maintain its moisture content and decrease water in its cells, which could burst upon freezing. Also, its flesh color may change which indicates reduced chlorophyll which normally happens in winter.

10. How Can Echinocereus Cacti Bloom Successfully?

Echinocereus cacti are planted mainly for their flowers which are showy and colorful and make the plants attractive. You can do certain things to make these plants have great blooms.

11. Blooming Season

Echinocereus cacti flower in spring between late March and early June, depending on your living area. However, they even bloom during other times in the year, but occasionally.

While young Echinocereus cacti have just one session of blooms in a given season, older plants will have many blooming sessions during their growing season.

Echinocereus flowers are extremely beautiful. They are cup- or funnel-shaped and have an amazing fragrance. Their colors range from bright pink, magenta and red to even yellow.

These plants bloom only if they get full sun for minimum 6 to 8 hours daily. Therefore, while growing them indoors, make sure to place them in your home’s sunniest spots. You can even consider using grow lights to ensure bright lighting for minimum 6 hours. Also, these cacti love temperature variation from day to night, similar to their natural habitat. You can achieve this temperature variation during the day with grow lights that give off heat or a hot window spot.

12. Echinocereus Care after Blooming

Once the flowering season ends, Echinocereus cacti will need a cold, dormant period. Overwinter your plant in a dry, cool place for minimum 60 days. After the dormancy period, slowly introduce the plant to warmer temperatures, increased watering frequency and cactus fertilizer to induce growth and new blooms. But for the rest of the growing season, water only once a month and stop any additional fertilizer.

Pruning

While Echinocereus flowers don’t need much pruning, it’s recommended to remove withered flowers and branches because it will preserve nutrients for new growth.

13. Popular Species in the Genus

Echinocereus rigidissimus rubispinus (Rainbow Hedgehog Cactus): This wonderful columnar cactus is famous for its short, red-purple, dusty spines and greyish red-purple stigma lobes. Native to northwestern Mexico and southwestern United States, this stunning cactus has many other common names including Arizona Rainbow Cactus, Ruby Rainbow and Pectinatus rubispinus. It’s a small- to medium-sized cactus usually growing up to 10 inches (25cm) in height and 8 inches (20cm) in width. Its long, stiff reddish spines defend the plant from predators and decrease water evaporation. The 2-3-inch (5cm-7.5cm) wide flowers are trumpet-shaped and come in shades of bright pink at the top and are produced in late spring and summer. They are very attractive for pollinators like butterflies and bees.

Echinocereus triglochidiatus: This beautiful plant has long-lasting reddish blooms which make it enormously popular among cactus fans. It’s the most widespread of the Echinocereus species with most variable looks and is actually a mounding cactus and forms bulbous piles from a few to hundreds of cylindrical to spherical stems. Spination may range from dense to no spines at all.

Echinocereus lauii: If you are looking for an easy-to-grow cactus species that will regularly reward you with lovely flowers, E. lauii is your species. If provided adequate winter rest period, it will offer you regular beautiful flowers even since its young age. It’s cold-resistant above -5-degree C (23-degree F) or less for short durations. It grows well in mild climate if planted freely outdoors in well-drained soil. It’s a heavy bloomer and produces large deep pink to clear violet flowers from March to April.

Echinocereus pulchellus weinbergii: Popularly known as ‘Horse’s Teeth’, Echinocereus pulchellus weinbergii has an attractive globose shape and grows up to 13 inches (33cm) tall. This winter-dormant cactus originally belongs to Mexico. Its flowers appear in spring and are stunning with gorgeous pink and purplish shades. They make this plant so popular among gardeners.

Echinocereus brandegeei: Commonly known as ‘Et fingers’, Echinocereus brandegeei can attain a height of 35cm (14in). It looks uniquely stunning due to its round shape, tight spines and white or pink flowers. It blooms in spring and even during other times of the year. It goes dormant in winter.

Conclusion

Echinocereus genus has an incredible variety of species and so, has something for everyone. A great variety of shapes, sizes, spination, climate needs and flowers make this genus of cacti extremely popular among gardeners. Additionally, the plants are easy to grow and maintain too, and hence are ideal for beginners and of course for pros. Plant at least one Echinocereus cactus in your garden and enjoy its beauty! Don’t forget to tell us your experience in the comment section below. Also, go through other articles on this website which is dedicated to cactus species from all over the world.