If you’re looking for a truly unique and captivating orchid to add to your collection, the arachnis – exotic orchid species is a fantastic choice. These orchids, often called spider orchids for their long, slender petals, bring a dramatic and otherworldly beauty to any space.
Their care is a bit different from common phalaenopsis, but with the right knowledge, you can succeed. This guide gives you the practical steps to keep your arachnis healthy and blooming.
Arachnis – Exotic Orchid Species
This group of orchids is known for its sprawling, vine-like growth and flowers that resemble spiders or octopuses. They are primarily epiphytes, meaning they grow on trees in nature, and they love bright light and good air flow.
Where Do They Come From?
Arachnis orchids are native to Southeast Asia, the Philippines, and parts of the Pacific. They thrive in hot, humid lowland forests. Understanding their natural habitat is the first key to replicating those conditions at home.
- They experience high rainfall followed by short drier periods.
- They recieve dappled, bright light under the forest canopy.
- Constant breezes help keep their roots from staying soggy.
Popular Varieties for Growers
While there are many species, a few are more commonly found in cultivation. Each has its own special charm.
- Arachnis flos-aeris: Known for its fragrant, yellow-green flowers with maroon spots.
- Arachnis hookeriana: Features striking purple and white barred flowers on long spikes.
- Arachnis Maggie Oei: A popular hybrid that’s more compact and floriferous, great for beginners.
Light and Temperature Needs
Getting the light right is crucial. These are not low-light orchids.
Provide very bright, filtered light. An east or south-facing window (with sheer curtains) is ideal. Their leaves should be a light green color; dark green means too little light, while reddish tints signal too much.
They prefer warm temperatures year-round. Aim for 70-85°F (21-29°C) during the day and not below 60°F (15°C) at night. They really don’t like the cold.
What About Humidity?
High humidity, around 60-80%, is best. You can increase humidity with a humidifier, a pebble tray filled with water, or by grouping plants together. Good air movement is essential to prevent fungal issues in these humid conditions.
Watering and Feeding Your Orchid
Watering is where many new growers run into trouble. These orchids like to dry out a bit between waterings, but not completely bone-dry.
- Water thoroughly until water runs freely from the drainage holes.
- Allow the potting mix to become almost dry before watering again. This might be once a week or more often in hot weather.
- Reduce watering slightly in the cooler, winter months when growth slows.
Fertilize regularly but weakly. Use a balanced orchid fertilizer (like 20-20-20) at 1/4 strength every other week during the growing season. Flush the pot with plain water once a month to prevent salt buildup.
The Right Pot and Potting Mix
Arachnis orchids have vigorous roots that need excellent drainage and air flow. A traditional potting soil will suffocate them.
- Use a very coarse, fast-draining mix. Good options include large chunks of fir bark, charcoal, and perlite.
- Choose a pot with ample drainage holes. Slotted orchid pots or wooden baskets are excellent choices as they let air reach the roots.
- Repot every 2-3 years, or when the potting medium starts to break down. The best time is just after flowering or when new roots begin to grow.
Encouraging Blooms
The spectacular blooms are the reward for good care. Flower spikes usually emerge from the leaf axils.
Ensure you are providing enough light, as this is the most common reason for no flowers. A slight drop in nighttime temperature can sometimes help initiate a bloom spike. Be patient, as some varieties need to reach a certain size or maturity before they will flower reliably.
Common Problems and Solutions
Even with great care, you might encounter an issue. Here’s how to handle common ones.
Yellowing Leaves
This can be from overwatering, too much direct sun, or a natural process of shedding older leaves. Check your watering habits and light levels first.
No Flowers
Insufficient light is the usual suspect. Gradually move the plant to a brighter location. Also, ensure you are fertilizing appropriately during the growth season.
Pests
Watch for scale, mealybugs, and spider mites. Treat infestations early with insecticidal soap or neem oil, making sure to cover all leaf surfaces.
Propagating Your Arachnis
The most straightforward way to propagate these orchids is by division during repotting.
- Remove the plant from its pot and gently seperate the rhizome.
- Ensure each division has at least 3-4 healthy pseudobulbs or growths and a good root system.
- Pot each division seperately in fresh mix and care for as usual, keeping humidity high while new roots establish.
FAQ About Spider Orchids
Q: How often does the arachnis orchid bloom?
A: Most types bloom once a year, typically in late summer or fall, but a happy, mature plant can sometimes surprise you with multiple spikes.
Q: Are these orchids fragrant?
A: Yes, many species and hybrids are know for their fragrance, which is often strongest in the morning or evening. Scents vary from sweet to spicy.
Q: Can I grow an arachnis outdoors?
A: If you live in a warm, humid climate (USDA zones 10-11), you can grow them on a tree or in a shaded greenhouse. They must be protected from cold temperatures.
Q: Why are the leaf tips turning brown?
A: Brown leaf tips are often a sign of low humidity, underwatering, or a buildup of fertilizer salts. Try increasing humidity and flush the pot with water.
Growing an arachnis – exotic orchid species is a rewarding experience for any orchid enthusiast. By focusing on bright light, a well-draining potting mix, and careful watering, you’ll be well on your way to enjoying it’s incredible spider-like flowers for years to come. Remember, observation is your best tool; your plant will show you what it needs.