This Cactus Looks Like a Human Brain – Melocactus zehntneri Will Freak You Out
At first glance, you might do a double-take when you see the Melocactus zehntneri cactus. With its round, brain-like cephalium on top, this bizarre-looking plant is sure to catch your eye. But don’t let its freaky appearance fool you – the Melocactus zehntneri is actually a fascinating species that’s easy to grow at home. Despite its alien-esque looks, this cactus from Brazil has simple care needs once you get past its striking, one-of-a-kind formation. Keep reading to find out all about the wonderfully weird yet low-maintenance Melocactus zehntneri!
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About Melocactus zehntneri
Also known as the Turk’s cap or melon cactus, Melocactus zehntneri is native to parts of Brazil, though some varieties can be found in Mexico, Peru and the Caribbean. It has a single cylindrical stem with 10-15 ribs covered in spines. The real showstopper is the bright red cephalium on top that produces tiny pink flowers.
While it may look otherworldly, the Melocactus zehntneri makes a great low-maintenance houseplant when you meet its simple care needs. Here’s what you need to know:
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How to Care for Melocactus zehntneri
Light
This cactus requires at least 6 hours of direct sunlight per day to thrive. Outdoors is ideal, but you can also grow it inside near a sunny window or under a grow light. Lack of sufficient light will cause the plant to become leggy and lose its round shape.
Water
Melocactus zehntneri likes its soil to remain slightly moist. Water whenever the top few inches of soil have dried out, about once every 1-2 weeks. Be sure to saturate the soil completely and discard any excess moisture from the drainage tray.
Soil
Use a well-draining cactus soil mix. Standard potting soil holds too much moisture. The ideal cactus mix is gritty and porous to prevent rot.
Fertilizer
Feed every few months during spring and summer with a balanced cactus fertilizer diluted to half strength. This gives roots the nutrients needed for healthy growth.
Temperature
Warm temperatures between 70-90°F (21-32°C) are best. Avoid freezing winters.
Pests and Problems
Melocactus zehntneri is generally pest-free, though mealybugs or scale can appear. Treat with neem oil or manually remove pests. Root rot from overwatering is the biggest threat.
Pruning
Pruning isn’t required beyond removing any dead, damaged or discolored stems.
Potting and Repotting
Repot every 2-3 years in early spring in a container just an inch or two wider than before. Choose a well-draining pot and pack the soil firmly around the base.
Melocactus zehntneri Propagation Method
Melocactus zehntneri can only be propagated from seeds. Here are the steps for successful seed propagation:
- Time it right – sow the seeds in late February to March when conditions are ideal.
- Use a light, sandy and porous soil mix designed for cactus and succulent seeds. This mimics the plant’s natural environment.
- Fill a tray or pot with the soil mix and sow the seeds on the surface. Press down lightly to make good soil contact.
- Cover the tray or pot with a pane of glass or clear plastic. This prevents the seeds and soil from drying out.
- Maintain temperatures between 64-72°F (18-22°C) for optimal germination. Use a heat mat if needed.
- Once sprouted, remove the cover and move to a sunny spot. Allow the soil to dry slightly between waterings.
- Be patient! Melocactus seeds can be slow to germinate, taking 2-8 weeks.
Sticking to the right soil, controlled moisture levels, and ideal temperature range gives Melocactus zehntneri seeds the perfect start for successful propagation from seed. With some time and care, you’ll soon have new brain-like cacti to admire!