Buzz
Have you ever noticed how orchids seem to hold a certain magic? Their elegant stems and stunning petals perfectly complement ancient forests, yet they can also thrive indoors with minimal care. Repotting orchids ensures their roots aren’t overcrowded, allowing them to continue blooming beautifully in the years to come. Learn how to determine when your orchid needs repotting and how to transfer it to a new pot without damaging its delicate root system.
Steps
Understand Your Orchid
Determine the Right Time to Repot. The ideal time to repot an orchid is right after it finishes blooming and new growth begins. However, you don’t need to repot after every bloom; this task should only be done every 18-24 months. If you’re unsure when the last repotting occurred and the plant seems to have outgrown its pot, it’s likely overdue. Look for these signs to know if it’s time to repot:
- Multiple roots growing out of the pot. If you see roots – not just one or two – protruding from the pot, your orchid needs more space, and it’s time to move it to a larger container.
- Some roots are rotting. If the roots appear waterlogged and the growing medium no longer drains well, you’ll need to repot the orchid.
- The plant is spilling over the edges of the pot. If the orchid’s growth extends beyond the pot’s rim, it requires more room to thrive.
Avoid repotting orchids unless absolutely necessary. Overzealous repotting can disrupt the plant’s growth cycle. Only repot when the orchid clearly exhibits the symptoms mentioned above. If the plant appears healthy and fits well in its current pot, delay repotting for another year. It’s better for the orchid to be slightly cramped than repotted too soon.
Find the right growing medium. Once you’ve determined it’s time to repot, the next crucial step is selecting the appropriate growing medium. Many indoor orchids are epiphytic (growing on other plants) rather than terrestrial, meaning they don’t thrive in regular soil. These orchids will perish if planted in ordinary dirt.
- A mix of fir bark, sphagnum moss, charcoal, and coconut fiber is suitable for many orchids. The most common orchids will thrive in the following blend:
- 4 parts fir bark or coconut fiber
- 1 part charcoal
- 1 part perlite
- If you’re unsure about your orchid’s specific type, purchasing a pre-packaged orchid mix is the safest option for epiphytic orchids. This mix is available at most nurseries and garden centers.
- For terrestrial orchids (those that grow in soil), you’ll need a loose, water-retentive soil. Orchid soil should have a high proportion of perlite and bark chips. Consult your nursery for a mix tailored to your orchid’s variety.
Determine the appropriate pot size. When repotting an orchid, choose a pot that’s only about 2.5 cm larger than the current one. The plant needs more space, but not too much—otherwise, the orchid will focus on root growth and may not bloom for months. You can use plastic, clay, or ceramic pots that suit the orchid’s size.
- Ensure the new pot has proper drainage holes. Without adequate drainage, the orchid’s roots may rot.
- Some orchids have photosynthetic roots. If you’re growing a Phalaenopsis orchid, consider using a glass or clear plastic pot to allow sunlight to reach the roots.
- If opting for a larger pot, you can add clay shards at the bottom. This helps improve drainage for the moist growing medium in the center of the pot.
Prepare the Growing Medium
Measure the required amount of growing medium into a large bucket or bowl. Pour the mix into the new pot, then place it in a container twice the size of the planting pot. To prepare the orchid’s growing medium, soak it overnight. This ensures it retains enough moisture to support the orchid.
Soak the growing medium in hot water. Next, fill the bucket containing the medium with hot water. Avoid using cold water, as the medium won’t absorb it effectively. Ensure the medium reaches room temperature before repotting the orchid.
Drain the growing medium. You can use a kitchen strainer (thoroughly washed afterward) or a piece of cheesecloth to drain the mixture. Remove all water, leaving only the damp medium. Rinse with warm water to eliminate dust and debris.
Remove the orchid from its old pot. Gently lift the orchid, carefully separating each root. If roots are stuck, use sterilized scissors or a knife to cut them free. It’s crucial to use clean tools, as orchids are prone to disease.
- You can sterilize cutting tools by wiping them with rubbing alcohol.
Remove old medium and dead roots. Use your hands and clean scissors to trim the roots. Discard the old medium—charcoal, bark, moss, and similar materials. Carefully cut away any rotten roots, taking care not to damage healthy parts of the plant.
- Soft and drooping roots are likely dead and should be removed.
- Use your fingers to gently untangle individual roots.
Prepare the new pot. If reusing a pot, clean it thoroughly with boiling water to remove toxins and kill potential pathogens. For wide and deep pots, add a layer of clay shards or packing peanuts to improve drainage. This step isn’t necessary for shallow pots.
Repotting the Orchid
Place the orchid in the new pot. Position the roots downward toward the bottom of the pot, with newer roots facing the sides where there’s more space to grow. The upper roots should align with the same depth as in the old pot. This ensures the new growth remains above the surface while most of the root system stays below.
Press the growing medium into the pot. Spread the medium around the roots. Gently shake and tap the pot to settle the medium around the roots, using your hands to press lightly without damaging them. Ensure no large air pockets remain, as exposed roots won’t thrive.
- Add the medium gradually in small amounts. Press lightly around the roots, then add more and repeat.
- Continue until the pot is filled with the medium.
Ensure the orchid stands upright after repotting. Use a stake to support the plant or clip it to the pot’s edge to prevent it from tipping or growing crooked.
Continue caring for the orchid as usual. Place the orchid in a location with moderate temperatures and partial shade.
Tips
- Cover your workspace with old newspapers or plastic sheets.
- If the orchid is difficult to remove from the pot, consider breaking the pot carefully.
Warnings
- Always choose pots with drainage holes at the bottom. Stagnant water can lead to root rot.
- Avoid impulsively changing the orchid’s growing medium. If you believe a different medium might be better, research thoroughly and wait for the right time to repot.
What You’ll Need
- Plant pot
- Orchid growing medium
- Water
- Knife
- Pruning tools
- Packaging foam beads or crushed clay pellets
- Plant clips and stakes
