Problems

Geranium Problems: Causes & Quick Fixes

Quick answer

Geranium is prone to 16 common issues - each link below is a plant-specific fix guide.

Geranium houseplant

Geranium problems

Use the guides below to diagnose and fix common issues on Geranium. 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 Geranium

Yellow Leaves

Medium

Likely cause: Overwatering or waterlogged soil causes yellowing of lower leaves in geraniums

Quick fix: Allow soil to dry more; check drainage; remove standing water from saucers

Full fix guide →

Brown Tips

Medium

Likely cause: Common on this plant type; confirm with recent watering, light, and root checks.

Quick fix: Inspect the plant and correct the most likely care stressor before stacking treatments.

Full fix guide →

Root Rot

Medium

Likely cause: Common on this plant type; confirm with recent watering, light, and root checks.

Quick fix: Inspect the plant and correct the most likely care stressor before stacking treatments.

Full fix guide →

Overwatering

Medium

Likely cause: Common on this plant type; confirm with recent watering, light, and root checks.

Quick fix: Inspect the plant and correct the most likely care stressor before stacking treatments.

Full fix guide →

Underwatering

Medium

Likely cause: Common on this plant type; confirm with recent watering, light, and root checks.

Quick fix: Inspect the plant and correct the most likely care stressor before stacking treatments.

Full fix guide →

Spider Mites

Medium

Likely cause: Common on this plant type; confirm with recent watering, light, and root checks.

Quick fix: Inspect the plant and correct the most likely care stressor before stacking treatments.

Full fix guide →

Mealybugs

Medium

Likely cause: Common on this plant type; confirm with recent watering, light, and root checks.

Quick fix: Inspect the plant and correct the most likely care stressor before stacking treatments.

Full fix guide →

Aphids

Medium

Likely cause: Common on this plant type; confirm with recent watering, light, and root checks.

Quick fix: Inspect the plant and correct the most likely care stressor before stacking treatments.

Full fix guide →

Leggy Growth

Medium

Likely cause: Common on this plant type; confirm with recent watering, light, and root checks.

Quick fix: Inspect the plant and correct the most likely care stressor before stacking treatments.

Full fix guide →

Slow Growth

Medium

Likely cause: Common on this plant type; confirm with recent watering, light, and root checks.

Quick fix: Inspect the plant and correct the most likely care stressor before stacking treatments.

Full fix guide →

Wilting

Medium

Likely cause: Common on this plant type; confirm with recent watering, light, and root checks.

Quick fix: Inspect the plant and correct the most likely care stressor before stacking treatments.

Full fix guide →

Drooping Leaves

Medium

Likely cause: Common on this plant type; confirm with recent watering, light, and root checks.

Quick fix: Inspect the plant and correct the most likely care stressor before stacking treatments.

Full fix guide →

Low Humidity

Medium

Likely cause: Common on this plant type; confirm with recent watering, light, and root checks.

Quick fix: Inspect the plant and correct the most likely care stressor before stacking treatments.

Full fix guide →

Not Enough Light

Medium

Likely cause: Common on this plant type; confirm with recent watering, light, and root checks.

Quick fix: Inspect the plant and correct the most likely care stressor before stacking treatments.

Full fix guide →

Fungus Gnats

Medium

Likely cause: Common on this plant type; confirm with recent watering, light, and root checks.

Quick fix: Inspect the plant and correct the most likely care stressor before stacking treatments.

Full fix guide →

Mold on Soil

Medium

Likely cause: Common on this plant type; confirm with recent watering, light, and root checks.

Quick fix: Inspect the plant and correct the most likely care stressor before stacking treatments.

Full fix guide →

Frequently asked questions

How often should I water Geranium?

Water when top inch dries. Drain completely. In summer heat, may need daily watering. Never leave in standing water. In practice, water every 2–3 days in summer; every 5–7 days in winter. Water when top 2–3 cm is dry; lift the pot - light weight = needs water. Reduce significantly in winter - one of the most overwatered plants in this season.

What light does Geranium need?

Geranium grows best in full sun to partial shade - 4–6 hours of direct morning sun ideal.

Is Geranium toxic to pets?

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

How do I propagate Geranium?

Propagate Geranium from healthy stem or root divisions during active growth.

What soil is best for Geranium?

Use fast-draining compost. Loam-based or gritty compost. Good drainage essential. A good mix includes 50% potting mix, 30% perlite or coarse sand, 20% compost. Excellent drainage essential. Target soil pH around 5.8–6.5.

What humidity does Geranium need?

Geranium prefers low to moderate (30–50%); high humidity promotes fungal issues. Normal household humidity is usually fine.

When should I repot Geranium?

Repot Geranium every 1–2 years; slight root restriction encourages better flowering, ideally in spring. Signs it needs a bigger pot: roots escaping pot, reduced flowering.

How this Geranium problems guide is reviewed?

Editorial policy Review board

Written by · Reviewed by LeafyPixels Review Board · Updated June 22, 2026

This Geranium problems problem guide was researched and written by . Problems symptoms on Geranium, 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

**toxic to cats and dogs** (n.d.) Geranium. [Online]. Available at: https://www.aspca.org/pet-care/aspca-poison-control/toxic-and-non-toxic-plants/geranium (Accessed: 22 June 2026).
A strong spray of water knocks aphids off sturdy plants (n.d.) Aphids. [Online]. Available at: https://ipm.ucanr.edu/home-and-landscape/aphids/ (Accessed: 22 June 2026).
A strong stream of water can wash light mite infestations off plants (n.d.) Control Of Common Pests Of Landscape Plants. [Online]. Available at: https://fieldreport.caes.uga.edu/publications/B1074/control-of-common-pests-of-landscape-plants/ (Accessed: 22 June 2026).
Ants harvest honeydew and protect aphid colonies from predators (n.d.) Sooty Mold. [Online]. Available at: https://ipm.ucanr.edu/home-and-landscape/sooty-mold/ (Accessed: 22 June 2026).
aphids reproduce quickly with multiple generations per year (n.d.) Integrated Pest Management I P M For Aphids. [Online]. Available at: https://hgic.clemson.edu/factsheet/integrated-pest-management-i-p-m-for-aphids/ (Accessed: 22 June 2026).
black sooty mold (n.d.) Pn74174. [Online]. Available at: https://ipm.ucanr.edu/PMG/PESTNOTES/pn74174.html (Accessed: 22 June 2026).
breaking down dead organic matter (n.d.) Will Yellow Mushrooms Harm My Houseplant. [Online]. Available at: https://yardandgarden.extension.iastate.edu/faq/will-yellow-mushrooms-harm-my-houseplant (Accessed: 22 June 2026).
bumps or blisters (n.d.) Growing Geraniums. [Online]. Available at: https://www.umass.edu/agriculture-food-environment/greenhouse-floriculture/fact-sheets/growing-geraniums (Accessed: 22 June 2026).
Clemson Cooperative Extension advises allowing soil to dry between waterings on geraniums (n.d.) Geranium. [Online]. Available at: https://hgic.clemson.edu/factsheet/geranium/ (Accessed: 22 June 2026).
corky water blisters on ivy-type leaves (n.d.) Geranium Diseases. [Online]. Available at: https://extension.psu.edu/geranium-diseases (Accessed: 22 June 2026).
Cornell greenhouse guidance recommends using a hand lens to look for spider mites when edema is noted on geraniums (n.d.) Geranium Pelargonium Hortorum. [Online]. Available at: https://greenhouse.cornell.edu/pests-diseases/diseases-of-specific-crops/geranium-pelargonium-hortorum/ (Accessed: 22 June 2026).
Cover tops and undersides thoroughly; these products kill only pests contacted during application (n.d.) Insects Indoor Plants. [Online]. Available at: https://extension.umn.edu/product-and-houseplant-pests/insects-indoor-plants (Accessed: 22 June 2026).
do not let the pot sit in standing water (n.d.) Bringing Houseplants Indoors. [Online]. Available at: https://extension.psu.edu/bringing-houseplants-indoors (Accessed: 22 June 2026).
drought stress is a listed cause of marginal leaf necrosis on geraniums (n.d.) Nutritional Problems On Geraniums. [Online]. Available at: https://www.canr.msu.edu/news/nutritional_problems_on_geraniums (Accessed: 22 June 2026).
e-Gro Bulletin 1-17 notes that mild chlorosis on upper surfaces with edema on undersides should trigger a close mite check (n.d.) E GRO Bulletin 1 17. [Online]. Available at: https://www.e-gro.org/pdf/E-GRO_Bulletin_1-17.pdf (Accessed: 22 June 2026).
Excess nitrogen produces soft, succulent growth that attracts aphids (n.d.) Keep Aphids Under Control Low Risk Natural Strategies. [Online]. Available at: https://extension.oregonstate.edu/news/keep-aphids-under-control-low-risk-natural-strategies (Accessed: 22 June 2026).
gnats are not Pythium vectors (n.d.) Geranium Pelargonium Spp Blackleg Damping. [Online]. Available at: https://pnwhandbooks.org/plantdisease/host-disease/geranium-pelargonium-spp-blackleg-damping (Accessed: 22 June 2026).
green peach aphid is not the vector for Pelargonium flower break virus (n.d.) Geranium Pelargonium Flower Break Virus Pfbv. [Online]. Available at: https://www.umass.edu/agriculture-food-environment/greenhouse-floriculture/photos/geranium-pelargonium-flower-break-virus-pfbv (Accessed: 22 June 2026).
Ideal indoor temperatures are 65–70°F by day and around 55°F at night (n.d.) Growing Geraniums Indoors. [Online]. Available at: https://hgic.clemson.edu/factsheet/growing-geraniums-indoors/ (Accessed: 22 June 2026).
if the pot is light, it needs water (n.d.) Problems Common To Many Indoor Plants. [Online]. Available at: https://www.missouribotanicalgarden.org/gardens-gardening/your-garden/help-for-the-home-gardener/advice-tips-resources/visual-guides/problems-common-to-many-indoor-plants (Accessed: 22 June 2026).
in dry, hot locations mites may produce one generation a week (n.d.) Twospotted Spider Mite Tetranychus Urticae. [Online]. Available at: https://extension.uga.edu/programs-services/landscape-pest-management/Nursery-pests/twospotted-spider-mite-tetranychus-urticae.html (Accessed: 22 June 2026).
in environments with less light, plants grow more slowly and use less water (n.d.) Lighting Indoor Plants. [Online]. Available at: https://extension.umn.edu/planting-and-growing-guides/lighting-indoor-plants (Accessed: 22 June 2026).
insecticidal soap (n.d.) Insect Control Insecticidal Soap. [Online]. Available at: https://extension.colostate.edu/resource/insect-control-insecticidal-soap/ (Accessed: 22 June 2026).
Ivy-leaved types will not flower in shade (n.d.) Trailing Stems. [Online]. Available at: https://www.rhs.org.uk/plants/pelargonium/trailing-stems (Accessed: 22 June 2026).
Keep water off leaves to reduce disease risk (n.d.) Growing Annual Geraniums. [Online]. Available at: https://yardandgarden.extension.iastate.edu/how-to/growing-annual-geraniums (Accessed: 22 June 2026).
larvae thrive in constantly moist soil (n.d.) How Treat Pesky Fungus Gnats Houseplants. [Online]. Available at: https://extension.umn.edu/yard-and-garden-news/how-treat-pesky-fungus-gnats-houseplants (Accessed: 22 June 2026).
Lower leaves turn yellow and fall when plants wilt from water stress (n.d.) Geraniums. [Online]. Available at: https://fieldreport.caes.uga.edu/publications/B790/geraniums/ (Accessed: 22 June 2026).
Mealybugs are covered with powdery wax (n.d.) Mealybugs Indoor Plants. [Online]. Available at: https://extension.umd.edu/resource/mealybugs-indoor-plants (Accessed: 22 June 2026).
Mites are common on houseplants stressed by low humidity and heat (n.d.) IN894. [Online]. Available at: https://edis.ifas.ufl.edu/publication/IN894 (Accessed: 22 June 2026).
Oklahoma State University Extension (n.d.) BTI repeat schedule. [Online]. Available at: https://extension.okstate.edu/programs/gardening/grow-gardening-columns/grow-columns-2022/jan-23-2022-fungus-gnats (Accessed: 22 June 2026).
Pelargoniums tolerate dry soil better than overly wet soil (n.d.) Growing Geraniums Minnesota. [Online]. Available at: https://extension.umn.edu/flowers/growing-geraniums-minnesota (Accessed: 22 June 2026).
Penn State Extension (n.d.) Fungus gnat biology and management. [Online]. Available at: https://extension.psu.edu/fungus-gnats-in-indoor-plants (Accessed: 22 June 2026).
root rot from waterlogged soil (n.d.) Diagnosing Houseplant Problems Diseases. [Online]. Available at: https://yardandgarden.extension.iastate.edu/how-to/diagnosing-houseplant-problems-diseases (Accessed: 22 June 2026).
roots lose oxygen (n.d.) Overwatering. [Online]. Available at: https://www.missouribotanicalgarden.org/gardens-gardening/your-garden/help-for-the-home-gardener/advice-tips-resources/insects-pests-and-problems/environmental/overwatering (Accessed: 22 June 2026).
saprotrophic fungi in very organic, wet mix (n.d.) The Invasion Of The Flower Pot Parasol. [Online]. Available at: https://extension.psu.edu/programs/master-gardener/counties/adams/news/the-invasion-of-the-flower-pot-parasol (Accessed: 22 June 2026).
Several aphid species feed on foliar, stem, flower, and bud tissues of geraniums (n.d.) Geranium Pelargonium Aphid. [Online]. Available at: https://pnwhandbooks.org/insect/hort/landscape/hosts-pests-landscape-plants/geranium-pelargonium-aphid (Accessed: 22 June 2026).
soap only works on direct contact (n.d.) Managing Houseplant Pests. [Online]. Available at: https://extension.colostate.edu/resource/managing-houseplant-pests/ (Accessed: 22 June 2026).
Soaps and oils can damage drought-stressed plants or foliage in hot midday sun (n.d.) Spider Mites. [Online]. Available at: https://ipm.ucanr.edu/home-and-landscape/spider-mites/ (Accessed: 22 June 2026).
The Mexican mealybug is among several species that attack geraniums in greenhouse settings (n.d.) Geranium Zonal Or Ivy Pelargonium. [Online]. Available at: https://portal.ct.gov/CAES/Plant-Pest-Handbook/pphG/Geranium-Zonal-or-Ivy-Pelargonium (Accessed: 22 June 2026).
thick woody stems (n.d.) Growing Guide. [Online]. Available at: https://www.rhs.org.uk/plants/pelargonium/growing-guide (Accessed: 22 June 2026).
UF/IFAS notes that aphids suck plant juices and heavy infestations cause distorted growth on geraniums (n.d.) FP458. [Online]. Available at: https://edis.ifas.ufl.edu/publication/FP458 (Accessed: 22 June 2026).
water when the soil surface becomes dry to the touch (n.d.) How Do I Care Garden Geraniums. [Online]. Available at: https://yardandgarden.extension.iastate.edu/faq/how-do-i-care-garden-geraniums (Accessed: 22 June 2026).