Problems

Philodendron Imperial Red Problems: Causes & Quick Fixes

Quick answer

Philodendron Imperial Red is prone to 22 common issues - each link below is a plant-specific fix guide.

Philodendron Imperial Red houseplant

Philodendron Imperial Red problems

Use the guides below to diagnose and fix common issues on Philodendron Imperial Red. Each problem page explains why it happens on this species and what to do first.

Or use our problem diagnosis tool to narrow down symptoms.

Common problems on Philodendron Imperial Red

Ants on Plant

Low

Likely cause: Philodendron is a large genus of flowering plants in the family Araceae. As of September 2025, the Plants of the World Online accepted 625 species; [2] other sources accept different numbers. [3][4] …

Quick fix: Confirm diagnosis on your Philodendron Imperial Red, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Leaf Drop

Medium

Likely cause: Feb 21, 2024 · Philodendron Types with Pictures and Care Guide The green heartleaf Philodendron is a vining type of plant with dark-green leaves in a heart’s shape. This type of Philodendron can be …

Quick fix: Confirm diagnosis on your Philodendron Imperial Red, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Leaf Spot Disease

Medium

Likely cause: Feb 21, 2024 · Philodendron Types with Pictures and Care Guide The green heartleaf Philodendron is a vining type of plant with dark …

Quick fix: Confirm diagnosis on your Philodendron Imperial Red, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Leaf Miners

Medium

Likely cause: Feb 21, 2024 · Philodendron Types with Pictures and Care Guide The green heartleaf Philodendron is a vining type of plant with dark-green leaves in a heart’s shape. This type of Philodendron can be …

Quick fix: Confirm diagnosis on your Philodendron Imperial Red, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Plant Leaning

Medium

Likely cause: Philodendron is a large genus of flowering plants in the family Araceae. As of September 2025, the Plants of the World Online accepted 625 species; [2] other sources accept different numbers. [3][4] …

Quick fix: Confirm diagnosis on your Philodendron Imperial Red, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Thin Stems

Medium

Likely cause: Feb 6, 2025 · If you are thinking of adding a philodendron to your indoor or outdoor garden, choosing the right variety can be a challenge because there are so many different options. Some are more …

Quick fix: Follow extension or botanical guidance for Philodendron Imperial Red thin stems; adjust care before applying broad treatments.

Full fix guide →

Aphids

Medium

Likely cause: Aphids on Philodendron Imperial Red cluster on soft burgundy new leaves and petiole tips at the crown, sucking sap and leaving sticky honeydew. First step: isolate the plant, blast colonies off with l

Quick fix: See plant-specific guide for step-by-step fixes.

Full fix guide →

Drooping Leaves

Medium

Likely cause: Drooping leaves on Philodendron Imperial Red usually trace to water stress, damaged roots, or heat-often with wet heavy soil or a bone-dry pot behind the same limp burgundy petioles. First step: lift

Quick fix: See plant-specific guide for step-by-step fixes.

Full fix guide →

Fungus Gnats

Medium

Likely cause: Fungus gnats on Philodendron Imperial Red mean the soil surface has stayed wet too long-often from calendar watering, low light, or an oversized pot. First step: let the top 3–5 cm (1–2 inches) dry co

Quick fix: See plant-specific guide for step-by-step fixes.

Full fix guide →

Leggy Growth

Medium

Likely cause: Leggy growth on Philodendron Imperial Red is usually caused by insufficient light-the plant stretches petioles and opens weak green leaves while the rosette thins out. First step: move it to brighter

Quick fix: See plant-specific guide for step-by-step fixes.

Full fix guide →

Low Humidity

Medium

Likely cause: Low humidity on Philodendron Imperial Red shows up as brown tips, crispy leaf edges, and slowed new growth when indoor air drops below 50% RH-common near heating vents and AC. First step: move the pla

Quick fix: See plant-specific guide for step-by-step fixes.

Full fix guide →

Mealybugs

Medium

Likely cause: Mealybugs on Philodendron Imperial Red hide as white cottony clusters in petiole axils of the self-heading rosette and along burgundy stem sheaths. Isolate the plant, dab visible bugs with 70% alcohol

Quick fix: See plant-specific guide for step-by-step fixes.

Full fix guide →

Mold on Soil

Medium

Likely cause: Mold on soil on Philodendron Imperial Red is usually harmless saprophytic fungus on chronically damp peat mix-often from overwatering or poor airflow in low light. First step: scrape off visible mold,

Quick fix: See plant-specific guide for step-by-step fixes.

Full fix guide →

Not Enough Light

Medium

Likely cause: Not enough light on Philodendron Imperial Red shows as weak green new leaves, dull color, slow growth, and a rosette leaning toward windows-this cultivar needs brighter filtered light than Imperial Gr

Quick fix: See plant-specific guide for step-by-step fixes.

Full fix guide →

Overwatering

Medium

Likely cause: Overwatering on Philodendron Imperial Red usually means the self-heading crown sits in wet mix too long-often from calendar watering, low light, or an oversized pot. Stop watering immediately, check t

Quick fix: See plant-specific guide for step-by-step fixes.

Full fix guide →

Spider Mites

Medium

Likely cause: Spider mites on Philodendron Imperial Red show as fine stippling and dull patches on large leathery leaves-often bronze or silvery on burgundy-red new growth-with webbing at the crown in dry winter ai

Quick fix: See plant-specific guide for step-by-step fixes.

Full fix guide →

Underwatering

Medium

Likely cause: Underwatering on Philodendron Imperial Red usually means the self-heading crown went too long without a full drink-often from fear of overwatering, fast-drying perlite mix, or bright light without adj

Quick fix: See plant-specific guide for step-by-step fixes.

Full fix guide →

Wilting

Medium

Likely cause: Wilting on Philodendron Imperial Red usually means water stress at the roots-not always too little water. First step: lift the pot and probe the top 3–5 cm of mix; a heavy wet pot calls for a dry-back

Quick fix: See plant-specific guide for step-by-step fixes.

Full fix guide →

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Frequently asked questions

How often should I water Philodendron Imperial Red?

Every 7–10 days in summer - allow top 3–5 cm to dry. Every 10–14 days in winter.

What light does Philodendron Imperial Red need?

Philodendron Imperial Red grows best in medium to bright indirect light, low indirect light (colour dulls).

Is Philodendron Imperial Red toxic to pets?

Philodendron Imperial Red is toxic to cats, dogs, rabbits, birds, horses, turtles, and tortoises. Keep out of reach of curious pets and choose pet-safe alternatives for accessible spots.

How do I propagate Philodendron Imperial Red?

Propagate Philodendron Imperial Red from healthy stem or root divisions during active growth.

What soil is best for Philodendron Imperial Red?

Use standard potting mix + 20–25 % perlite. Well-draining. pH 5.5–6.5.

When should I repot Philodendron Imperial Red?

Repot Philodendron Imperial Red when roots circle the pot or growth slows despite good care.

Why does my Philodendron Imperial Red have ants on plant?

Philodendron is a large genus of flowering plants in the family Araceae. As of September 2025, the Plants of the World Online accepted 625 species; [2] other sources accept different numbers. [3][4] … Quick fix: Confirm diagnosis on your Philodendron Imperial Red, then address the most likely care or pest factor described in current extension guidance.

How this Philodendron Imperial Red problems guide is reviewed?

Editorial policyReview board

Written by · Reviewed by LeafyPixels Review Board · Updated June 17, 2026

This Philodendron Imperial Red problems problem guide was researched and written by . Problems symptoms on Philodendron Imperial Red, lookalike causes, and step-by-step fixes are cross-checked against extension pest, disease, and care references before publication.

We prioritize sources that hold up under scrutiny:

  • University cooperative extension bulletins and fact sheets (Penn State, Clemson, UMD, NC State, and similar programs)
  • Botanical garden and horticultural society publications
  • Peer-reviewed plant science and veterinary toxicology references where pet safety matters (including ASPCA Animal Poison Control)
  • Established reference works on indoor plant culture

The LeafyPixels editorial team then reviews the draft for clarity, step-by-step usefulness, and fit with real apartment and home conditions-not ideal greenhouse setups. When guidance changes materially, we update the page and note the revision date.

Sources used

  1. A potato slice placed on damp soil for 48 hours (n.d.) 1445 Fungus Gnats. [Online]. Available at: https://planttalk.colostate.edu/topics/insects-diseases/1445-fungus-gnats/ (Accessed: 17 June 2026).
  2. American serpentine leafminer (*L. trifolii*) (n.d.) IN506. [Online]. Available at: https://edis.ifas.ufl.edu/publication/IN506 (Accessed: 17 June 2026).
  3. ASPCA Animal Poison Control (n.d.) Animal Poison Control. [Online]. Available at: https://www.aspca.org/pet-care/animal-poison-control (Accessed: 17 June 2026).
  4. between 65 and 85 degrees F (n.d.) Philodendron. [Online]. Available at: https://plants.ces.ncsu.edu/plants/philodendron/ (Accessed: 17 June 2026).
  5. Bti is the active ingredient in soil drench products (n.d.) Fungus Gnats. [Online]. Available at: https://extension.umd.edu/resource/fungus-gnats (Accessed: 17 June 2026).
  6. can easily fall below 30% (n.d.) Humidity And Houseplants. [Online]. Available at: https://extension.psu.edu/humidity-and-houseplants (Accessed: 17 June 2026).
  7. cluster around new stem growth (n.d.) Bringing Houseplants Indoors. [Online]. Available at: https://extension.psu.edu/bringing-houseplants-indoors (Accessed: 17 June 2026).
  8. Colorado State Extension notes repeat applications every four to seven days (n.d.) Insect Control Insecticidal Soap. [Online]. Available at: https://extension.colostate.edu/resource/insect-control-insecticidal-soap/ (Accessed: 17 June 2026).
  9. common houseplant sap feeders that produce honeydew (n.d.) Insect Pests Houseplants. [Online]. Available at: https://extension.msstate.edu/publications/insect-pests-houseplants (Accessed: 17 June 2026).
  10. Contact sprays and soaps (n.d.) Vegleafminers. [Online]. Available at: https://ipm.ucanr.edu/PMG/GARDEN/VEGES/PESTS/vegleafminers.html (Accessed: 17 June 2026).