Rainy Season Alert! 5 Signs of 'Root Rot' in Monstera and Philodendron, Plus How to Bring Them Back to Life
Plant Guide

Rainy Season Alert! 5 Signs of 'Root Rot' in Monstera and Philodendron, Plus How to Bring Them Back to Life

05 Jul 2026 11 ครั้ง อ่าน 19 นาที

Ever felt that familiar anxiety when the rainy season arrives? The high humidity often brings with it the dreaded 'root rot,' a common foe for our beloved Monstera (Monstera spp.) and Philodendron (Philodendron spp.). Today, Pama The Gardener is here to share 5 crucial warning signs of root rot, along with first-aid methods to help them bounce back to life.

Rainy Season... Why Does Root Rot Become Prevalent in Monstera and Philodendron?

When the rainy season hits, the air gets super humid, and temperatures can swing up and down. This is actually a perfect playground for the fungi and bacteria that cause root rot. It's especially tricky if your potting mix isn't airy enough, or if you accidentally water too much and leave standing water. Your plant's roots can't breathe then! The plump, sensitive roots of Monstera and Philodendron quickly get weak, making them super easy targets for infection and decay.

If we understand this, it's easier to prevent. Just try to keep their environment balanced!

5 Warning Signs of 'Root Rot' to Look Out For Immediately

Don't wait until it's too late! Keep an eye out for these 5 signs. If you spot any, act fast!

1. Yellowing or Dark Brown Leaves, Despite Regular Watering

  • Look out for: Yellow leaves can happen for many reasons, but if they're yellow and also look droopy, like they're thirsty, even though you've been watering regularly or just watered, that's a big red flag.
  • Here's why: When roots rot, they can't soak up water and nutrients for the stem and leaves. So the leaves look dehydrated, even if the soil is wet! Those dark brown spots? That's just dead plant tissue.

2. Soft, Mushy, or Slimy Stem and Leaf Stems

  • Look out for: Gently feel the stem and leaf stems. If they feel unusually soft, mushy, or have a sticky slime at the base, that means the root rot has spread up to the stem.
  • Here's why: The rot doesn't just stay in the roots. Fungi and bacteria can climb up to the stem, damaging and breaking down the plant's insides.

3. Potting Mix Smells Musty or Like Rotten Eggs

  • Look out for: Smell is a huge clue! Take a sniff of the potting mix near the base of your plant. If it smells strong and musty, like rotten soil or rotten eggs, that's a sign that bacteria are having a field day with the decaying roots.
  • Here's why: When roots die and sit in waterlogged soil, certain bacteria break them down. And when they do, they release stinky gases – that's the smell you're getting!

4. Stunted Growth or Overall Unhealthy Appearance

  • Look out for: If your plant used to grow happily, popping out new leaves regularly, but then suddenly just... stopped? Leaves aren't getting bigger, and it just doesn't look as lively as before? That's another sign something's off with its roots.
  • Here's why: When roots get damaged, the plant can't do its job properly. It stops making energy and new cells, so growth slows right down.

5. Roots Turn Dark, Soft, and Easily Detach When Touched

  • Look out for: This is the clearest evidence! You'll need to gently take the plant out of its pot to check the roots. If they look dark (healthy roots are usually white or creamy), feel soft and mushy, or just fall apart easily, then it's definitely root rot.
  • Here's why: Nasty pathogens have attacked and broken down the root cells, causing them to die and lose their structure and ability to work.

First Aid for 'Monstera and Philodendron' with Root Rot to Save Them

If you encounter these signs, don't despair! We still have ways to help them:
  1. Gently remove from the pot: Carefully lift your plant out, trying not to damage the roots any further.
  2. Rinse the roots clean: Use plain water to gently rinse off all the old potting mix until you can clearly see the roots.
  3. Trim off the rotted bits: Grab some sharp, sterilized scissors (you can flame-sterilize them or wipe with alcohol) and snip off all the rotted sections of the roots (the dark, mushy ones). Keep going until you reach healthy, firm, white or creamy root tissue.
  4. Apply red lime paste (if you have it): If you have red lime paste for plant wounds, dab it onto the cut areas to help prevent fungal infection.
  5. Let them air dry: Place your plant in a shaded, well-ventilated spot for about 1-2 hours. This helps the root wounds dry out.
  6. Replace all the potting mix: Use a potting mix specifically for Monstera and Philodendron that's super airy and drains really well. Look for mixes with coco coir, perlite, and volcanic rock (for example, 40% coco coir, 30% perlite, 30% composted leaf mold soil).
  7. Repot in the same or a smaller pot: Pick a pot that's just right for the roots you have left (not too big!). Make sure it has plenty of drainage holes at the bottom to prevent water from sitting.
  8. No watering right away: After repotting, hold off on watering for about 3-5 days. This gives your plant time to recover and adjust, without disturbing the remaining roots.
  9. Aftercare: Place the plant in a spot with bright, indirect light and good air circulation. Skip the fertilizer for now. Wait until you see new leaves sprouting or the plant looks strong again before giving it a light feed.

Preventing Root Rot in the Rainy Season... It's the Best!

Prevention is always better than cure! To keep your Monstera and Philodendron strong all through the rainy season, try these tips:
  • Use pots with great drainage: Pick pots with lots of drainage holes at the bottom, or even ones with slightly raised feet.
  • Your potting mix needs to be airy, light, and drain well: Focus on materials that don't hold too much water, like coco coir, perlite, volcanic rock, or pine bark. The mix should feel loose, not dense.
  • Adjust your watering routine: During the rainy season, humidity is super high, so your potting mix will dry out much slower. Stick your finger 2-3 inches deep into the soil. If it still feels cool and moist, don't water yet! Or, just water 2-3 times less than you normally would.
  • Boost air circulation: If your plants are indoors or in a condo, try opening windows or using a small fan on a low setting to help reduce the humidity around them.
  • Avoid putting pots directly on the floor: Moisture from the floor can creep up into the pot. Try using a raised saucer or a plant stand instead.
Remember, caring for plants isn't hard at all; it's just about understanding what they need. At Pama The Gardener, we're always here to help and give advice, so everyone can enjoy beautiful plants that heal their hearts.

คำถามที่พบบ่อย

What is the main cause of root rot in Monstera and Philodendron?

Root rot mainly happens when roots get too much water and can't breathe. This makes them decay and easily get infected by fungi or bacteria, especially during the rainy season when humidity is high and the potting mix doesn't drain well.

How often should I water during the rainy season?

During the rainy season, you should water much less often than usual. Always check the potting mix moisture by sticking your finger 2-3 inches deep. If it still feels cool or moist, don't water! It's best to let the potting mix dry out completely before watering again.

What type of potting mix is suitable for preventing root rot?

A good potting mix needs to be airy, light, and drain really well. It should have a good mix of coco coir, perlite, volcanic rock, and composted leaf mold soil to avoid holding too much water and to allow for good air flow.

If all the rotted roots are cut off, will the plant survive?

There's a good chance of survival if the remaining roots are healthy and the stem isn't too damaged. After trimming the rotted roots, repot the plant in a fresh, airy potting mix and don't water for a bit to let the plant recover.
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