Araceae
How to Care for Aglaonema costatum (Spotted Evergreen)
Aglaonema costatum
An easy-care tropical plant perfect for beginners. Keep in low to medium indirect light, water every 9 days when the top inch of soil dries out, maintain humidity above 60%, and keep temperatures between 15–30°C. Avoid cold drafts and direct sunlight.
Every 9 days
Low light
15° - 30°C
60% - 80%
Categories
What is Spotted Evergreen?
Spotted Evergreen (Aglaonema costatum) is a easy-care plant from the Araceae family. Aglaonema costatum, commonly known as the Spotted Evergreen, is a compact tropical aroid native to the rainforests of Southeast Asia. It features striking dark green leaves adorned with silver-white spots and a distinctive white midrib, making it one of the most visually appealing low-light housepla...
Spotted Evergreen grows up to 60cm, with spread of 45cm, watering every 9 days, 15°C – 30°C, 60–80% humidity. It is suitable for indoor environments and not safe for pets.
Unlike many tropical plants, Spotted Evergreen tolerates watering mistakes. Best for beginners. Without precautions, ingestion can cause irritation in pets. Keep out of reach of cats and dogs. Without adequate drainage, root rot can develop within 18 days.
How to Care for Spotted Evergreen?
TLDR: Spotted Evergreen needs Low light, watering every 9 days, and temperatures between 15-30°C with 60-80% humidity.
How Often Should You Water Spotted Evergreen?
Water when the top inch of soil feels dry — approximately every 7–10 days in summer, less in winter. Always use room-temperature water. Aglaonema costatum is sensitive to fluoride, so filtered or rainwater is preferred.
How Much Light Does Spotted Evergreen Need?
Thrives in low to medium indirect light — ideal for north or east-facing windows. It tolerates shade better than most houseplants, but avoid deep shade as variegation may fade. Never expose to direct sunlight, which scorches the decorative leaves.
What Is the Best Soil for Spotted Evergreen?
Use a well-draining mix of peat/coco coir, perlite, and regular potting soil in a 1:1:2 ratio. Ensure the pot has drainage holes. Slightly acidic pH of 5.6–6.5 is ideal. Repot every 2 years or when roots emerge from drainage holes.
What Pot Should You Use for Spotted Evergreen?
A pot with drainage holes is essential. Terracotta pots are ideal as they help prevent overwatering by allowing evaporation. Choose a pot only slightly larger than the root ball — Aglaonema prefers slightly snug conditions.
Care Schedule
Fertilize
Every 30 days
Misting
Every 3 days
Repot
Every 730 days
What Is Spotted Evergreen and Where Does It Come From?
Aglaonema costatum, commonly known as the Spotted Evergreen, is a compact tropical aroid native to the rainforests of Southeast Asia. It features striking dark green leaves adorned with silver-white spots and a distinctive white midrib, making it one of the most visually appealing low-light houseplants available.
How to Propagate Spotted Evergreen?
Stem Cutting
Use rooting hormone to speed up rooting. Keep warm and humid. Avoid direct sun during rooting.
- 1 Select a healthy stem with at least 2-3 leaves
- 2 Cut below a node using a clean sharp blade
- 3 Place in moist perlite or water until roots develop
- 4 Transplant to well-draining soil when roots reach 3–4 cm
Materials needed:
Division
Divide only during repotting in spring. Water sparingly for the first week.
- 1 Remove the plant from its pot
- 2 Gently separate root clumps into 2–3 sections
- 3 Each section must have healthy roots and at least one stem
- 4 Plant each division in fresh well-draining soil
Materials needed:
How Big Does Spotted Evergreen Grow?
TLDR: Spotted Evergreen can reach up to 60cm tall with Slow growth rate.
Max height
60cm
Spread
45cm
Growth rate
Slow
Foliage
Evergreen
Warning: Toxic Plant
This plant can be toxic if ingested. Keep out of reach of:
Plant Uses
Ornamental
Great for decoration
Air Purifying
Improves air quality
Is your plant showing symptoms?
Click on the symptom to discover possible causes:
What Diseases Commonly Affect Spotted Evergreen?
TLDR: Spotted Evergreen is susceptible to 10 known diseases. Monitor regularly for early detection.
Root Rot
Root rot is a serious fungal disease that affects the root system of plants, causing them to decay and die. It is primarily caused by overwatering, poor drainage, or soil-borne fungi such as Pythium, Phytophthora, Rhizoctonia, and Fusarium. The disease thrives in waterlogged conditions where roots are deprived of oxygen, making them susceptible to fungal infection.
Mealybugs
Mealybugs are small, soft-bodied insects covered with a white, waxy, cottony material. They are common pests of houseplants and outdoor plants in mild climates. These sap-sucking insects feed on plant tissue, causing damage, stunted growth, and can lead to plant death if left untreated. They produce sticky honeydew which attracts sooty mold.
Overwatering
Overwatering occurs when plants receive too much water, depriving roots of oxygen and causing root rot. This environmental stress is one of the most common causes of houseplant death, as waterlogged soil prevents roots from breathing and functioning properly.
Spider Mites
Spider mites are tiny arachnids (less than 1/20 inch long) related to spiders and ticks that feed on plant sap. They thrive in hot, dry conditions and can cause significant damage to ornamental and vegetable plants. During severe infestations, crop losses can reach 14% or higher as these pests disrupt vital plant processes including photosynthesis, carbon dioxide absorption, and transpiration.
Meaning & Symbolism
Represents resilience and quiet strength — the ability to thrive gracefully in the shadows.
Fun Facts
Aglaonema costatum was first described botanically in 1879 and remains one of the most prized species in the genus for its unique spotted foliage.
The white spots on its leaves are not a disease — they are a natural genetic trait that makes each leaf pattern unique.
Despite its tropical origins, it is one of the most adaptable aroids for indoor cultivation, tolerating neglect better than most houseplants.
NASA plant studies suggest that Aglaonema species contribute to improved indoor air quality by filtering common toxins.
Frequently asked questions
How often should I water Aglaonema costatum?
Does Aglaonema costatum need a lot of light?
Is Aglaonema costatum toxic to pets?
Why are the leaves of my Spotted Evergreen turning yellow?
How do I increase humidity for Aglaonema costatum?
Compare with similar plants
| Attribute | Difficulty | Light | Watering | Pet Safe |
|---|---|---|---|---|
| Peace Lily | Easy | Low light | 4d | ⚠️ |
| Swiss Cheese Plant | Easy | Partial shade | 10d | ⚠️ |
| Golden Pothos | Easy | Low light | 8d | ⚠️ |
| ZZ Plant | Easy | Low light | 18d | ⚠️ |
