Surviving the Rainy Season: Preventing Root Rot in Aglaonema and Reviving Yellowing Leaves from Excessive Humidity
Plant Guide

Surviving the Rainy Season: Preventing Root Rot in Aglaonema and Reviving Yellowing Leaves from Excessive Humidity

27 Jun 2026 10 ครั้ง อ่าน 17 นาที

Ever experienced this? As soon as the rainy season arrives, your once vibrant 'Aglaonema' starts showing signs of yellowing leaves, wilting, or worst of all, stem rot, leading to its demise… This is a classic problem faced by indoor plant lovers, myself included. As a botanist with over 10 years of hands-on experience with these plants, I understand that the rainy season is truly a challenging time for both plant parents and the plants themselves.

Today, as PAMA The Gardener, I'll take you through an in-depth look at the causes and solutions for root rot in Aglaonema, a beautiful foliage plant many adore, along with techniques to revive weakened plants and bring them back to health and vibrancy.

Why is Our Aglaonema Prone to Root Rot During the Rainy Season?

Aglaonema (Aglaonema spp.) indeed loves high humidity, but 'atmospheric humidity' and 'soggy potting mix' are two different things. During the rainy season, key factors contributing to root rot are:
  • Reduced Sunlight: Less sunlight slows down the plant's transpiration, causing the potting mix to dry out slower than usual.
  • Very High Atmospheric Humidity: While they enjoy it, if humidity is too high and air circulation is poor, it creates an ideal breeding ground for fungi and bacteria.
  • Incorrect Watering: Most people tend to water on a fixed schedule without checking the moisture level in the potting mix, leading to prolonged waterlogged soil.

Warning Signs of 'Root Rot' to Quickly Observe

Don't wait until it's too late! If you see these symptoms, take immediate action:
  • Yellowing Leaves: Especially the lower leaves will start to yellow and fall off easily.
  • Soft Stem and Base: If you squeeze the stem and it feels soft and mushy, that's a dangerous sign.
  • Stunted Growth: The plant will appear dull, not growing, and not producing new leaves.
  • Musty Smell from Potting Mix: This odor is caused by decaying roots.

Root Rot Prevention Techniques for Aglaonema: Prepare Before the Rain

Prevention is always better than cure. Try following my advice:

1. Potting Mix Must Be Excellent at Drainage

This is crucial! A good potting mix for Aglaonema must drain very well and have good air circulation, not dense, moisture-retaining soil.

Recommendation: Use a mix of shredded coconut coir (pre-soaked), Perlite, volcanic rock, or pine bark in a well-aerated ratio. PAMA The Gardener uses this exact formula; it's guaranteed to be good for their roots.

2. Watering That 'Understands' Aglaonema

Special care is needed during the rainy season.
  • Check Before Watering: Stick your finger 2-3 inches deep into the potting mix. If it still feels cool and moist, don't water yet. Let it rest a bit.
  • Reduce Frequency: You might need to water 1-2 times less frequently than usual, or only when the potting mix is completely dry.
  • Dry is Better Than Wet: Remember this principle by heart. It's better to keep it slightly on the drier side than letting it get soggy.

3. Sunlight and Air Circulation: The Core

Aglaonema prefers bright, indirect light, not direct harsh sun.
  • Find a Spot with Enough Light: Place it where it receives indirect light throughout the day, such as near a window or in a well-lit corner.
  • Open Windows/Use a Fan: Good air circulation helps reduce moisture accumulation around the plant, especially in condos or air-conditioned rooms where air might be stagnant.

4. The Right Pot Matters More Than You Think

Don't overlook the pot.
  • Large Drainage Holes: Choose a pot with large and numerous drainage holes.
  • Pot Material: Terracotta pots help wick away moisture better than plastic pots. However, if you prefer the minimal aesthetic of plastic pots, you'll need to be extra careful with watering.

When It's Too Late: Techniques to Revive Aglaonema from Yellow Leaves and Root Rot

If you've noticed the signs and suspect a severe condition, try these steps to save your plant:

Step 1: Inspect and Trim Damaged Parts

Gently remove the plant from its pot. Remove all old potting mix and carefully rinse the roots with clean water.

Recommendation: Use clean, sharp scissors or a knife (sterilize with flame or alcohol before and after use) to trim away all rotted roots (dark, mushy, foul-smelling). Also remove yellow leaves or any soft, mushy stem sections.

Step 2: Use Red Lime or Fungicide

Prevent the spread of disease.

Recommendation: Apply red lime (used in betel nut chewing) or a powdered plant fungicide to the trimmed root and stem wounds. Let it dry for about 30 minutes to 1 hour.

Step 3: Recover in New Potting Mix

This is a crucial period for recovery.

Recommendation: Replant the Aglaonema in a new, airy, well-draining, and sterile potting mix (you can mix a small amount of powdered fungicide into the new mix). Do not water immediately; wait 1-2 days to allow the trimmed roots to adjust.

Step 4: Post-Recovery Care

Provide extra attention during this time.

Recommendation: Place it in a shaded, well-ventilated spot with indirect light, and refrain from fertilizing for now. Observe closely and water only when the potting mix is completely dry.

Senior Botanist's Summary Tips

Caring for Aglaonema to survive the rainy season isn't difficult. We just need to understand its nature and adjust our care accordingly.
  • Potting Mix: Must be airy and drain exceptionally well.
  • Watering: Always check before watering; 'dry is better than wet'.
  • Light and Air: Indirect light and good air circulation are key.
  • Pot: Must have sufficient drainage holes.

Just follow these tips, and your Aglaonema will be strong, vibrant, and provide beautiful foliage to soothe your heart for a long time.

FAQ: Common Questions about Aglaonema in the Rainy Season

Q1: Don't Aglaonema need high humidity?

A1: Yes, they prefer high atmospheric humidity, but not soggy potting mix. If the potting mix is waterlogged, roots can rot easily. Lightly misting the leaves on dry days or placing them near a pebble tray can help increase atmospheric humidity.

Q2: Should I fertilize during the rainy season?

A2: It's not recommended to fertilize much during the rainy season because plant growth tends to slow down. Over-fertilizing can weaken roots and make them more susceptible to diseases. Wait until the heavy rain period has passed and the plant resumes normal growth before applying a small amount of fertilizer.

Q3: My Aglaonema has yellow leaves but dry soil, what's wrong?

A3: If the soil is dry but leaves are yellow, it could be due to several reasons, such as inconsistent watering causing plant shock, a deficiency in certain nutrients, or even partial root death from severe dehydration alternating with overwatering. Try checking the roots to see if they are still healthy.

If you're looking for a strong 'Aglaonema' ready to thrive in all weather conditions,

PAMA The Gardener cultivates and cares for them with the utmost attention.

Welcome one into your home to bring you joy!

แชร์บทความนี้: LINE Facebook X

แกลเลอรี่ภาพ

🎉 โปรพิเศษเฉพาะที่นี่ ซื้อตรงจากเว็บเรา ราคาถูกกว่า รับประกันต้นไม้ทุกต้น

ช่องทางสั่งซื้อ

คลิกเลือกช่องทางที่สะดวก — ซื้อตรงเว็บเราคุ้มที่สุด

ซื้อบนเว็บเรา

สินค้าที่คุณอาจสนใจ

เลือกชมต้นไม้คุณภาพจากฟาร์ม PAMA

ต้นเทียนหยด มาในกระถางพร้อมตั้ง ไม้แดด ออกดอกเก่ง เป็นไม้คลุมดิน

ต้นเทียนหยด มาในกระถางพร้อมตั้ง ไม้แดด ออกดอกเก่ง เป็นไม้คลุมดิน

฿35
โกฐจุฬาล์มพาแคระ 8 นิ้ว (Coleus Dwarf / Painted Nettle)

โกฐจุฬาล์มพาแคระ 8 นิ้ว (Coleus Dwarf / Painted Nettle)

฿119
แจกันแก้วสีเขียวมรกต มีรูปทรงที่มีเอกลักษณ์ แจกันไฮโซ หรูหรา มอลโตสสีเหลืองขนาดเล็ก

แจกันแก้วสีเขียวมรกต มีรูปทรงที่มีเอกลักษณ์ แจกันไฮโซ หรูหรา มอลโตสสีเหลืองขนาดเล็ก

฿950
น้องกระต่ายขาว กระต่ายขาว ตุ๊กตาแต่งสวนจิ๋ว จัดสวนถาด โมเดลบ้านจิ๋ว [DolA-M-006]

น้องกระต่ายขาว กระต่ายขาว ตุ๊กตาแต่งสวนจิ๋ว จัดสวนถาด โมเดลบ้านจิ๋ว [DolA-M-006]

฿25
กระถางใส่ไลทอป รูปทรงเท้าแมว

กระถางใส่ไลทอป รูปทรงเท้าแมว

฿49
เล็บครุฑใบด่าง กระถาง 3 นิ้ว – Ming Aralia

เล็บครุฑใบด่าง กระถาง 3 นิ้ว – Ming Aralia

฿20
ต้นเฟิร์นฮาวาย ในกระถาง 6 นิ้ว ต้นไม้รำไร

ต้นเฟิร์นฮาวาย ในกระถาง 6 นิ้ว ต้นไม้รำไร

฿45
มะพร้าวจิ๋ว ต้นมะพร้าวจิ๋ว ตุ๊กตาแต่งสวนจิ๋ว จัดสวนถาด โมเดลบ้านจิ๋ว [DolD-XS-005] (L-15)

มะพร้าวจิ๋ว ต้นมะพร้าวจิ๋ว ตุ๊กตาแต่งสวนจิ๋ว จัดสวนถาด โมเดลบ้านจิ๋ว [DolD-XS-005] (L-15)

฿10
หมู LOVE ตุ๊กตาแต่งสวนจิ๋ว จัดสวนถาด โมเดลบ้านจิ๋ว [DolA-SET-002]

หมู LOVE ตุ๊กตาแต่งสวนจิ๋ว จัดสวนถาด โมเดลบ้านจิ๋ว [DolA-SET-002]

฿85
สเน่ห์จันทร์ขาว ในกระถางพร้อมตั้ง

สเน่ห์จันทร์ขาว ในกระถางพร้อมตั้ง

฿89
เซตยูนิคอร์นขี่เมฆ ตุ๊กตาแต่งสวนจิ๋ว จัดสวนถาด โมเดลบ้านจิ๋ว (F-6) [DolA-SET-003]

เซตยูนิคอร์นขี่เมฆ ตุ๊กตาแต่งสวนจิ๋ว จัดสวนถาด โมเดลบ้านจิ๋ว (F-6) [DolA-SET-003]

฿40
philodendron sp peru ฟิโลเดนดรอนเปรู

philodendron sp peru ฟิโลเดนดรอนเปรู

฿85