Fern Problems
Various (Polypodiopsida)
Ferns want consistently moist soil, high humidity, and indirect light — they're famously unforgiving of dry air and dry soil, with crispy brown fronds being the single most common complaint.
All Fern Problems
⚠ ModerateFern — Crispy, Brown Fern Fronds
Frond tips and edges turn brown, dry, and crispy, sometimes spreading across the whole frond in advanced cases.
⚠ MinorFern — Yellowing Fern Fronds
Fronds turn yellow, sometimes uniformly and sometimes starting at the base, before eventually browning and dying.
⚠ CriticalFern — Root Rot in Ferns
The plant wilts despite moist soil, and roots appear brown, mushy, and hollow rather than firm and white when checked.
⚠ ModerateFern — Leaflet or Frond Drop on Ferns
Individual leaflets or entire fronds drop from the plant, sometimes suddenly, reducing overall fullness.
⚠ ModerateFern — Scale Insects on Ferns
Small, immobile brown or tan bumps attach to fronds and stems, secreting honeydew and weakening the plant — one of the most common fern pests.
⚠ ModerateFern — Spider Mites on Ferns
Fine yellow stippling spreads across fronds, with fine webbing visible in heavier infestations, especially in dry indoor conditions.
⚠ ModerateFern — Mealybugs on Ferns
White, cottony masses cluster where fronds meet the main stem or crown, secreting honeydew and weakening the plant.
⚠ ModerateFern — Fungal Leaf Spot on Ferns
Small, dark, circular spots appear on fronds, sometimes with a yellow halo, and can merge into larger dead patches over time.
⚠ ModerateFern Wilting Despite Moist Soil
Fronds droop and wilt even though the soil feels adequately or overly moist to the touch.
⚠ MinorFern — Slow or Stunted Growth in Ferns
The plant produces few or no new fronds over an extended period, even during the growing season.
⚠ MinorFern — Sunburn and Scorch on Fern Fronds
Fronds develop a bleached, yellow-brown, or crispy patch, usually on the side facing direct sun exposure.
⚠ CriticalFern — Rhizome Rot in Ferns
The central rhizome (the thick, often visible stem-like structure from which fronds emerge) turns soft and dark, and fronds may wilt or die back as a result.
⚠ MinorFern — Fungus Gnats in Fern Potting Mix
Small dark flies hover around the plant and soil surface, thriving in the consistently moist conditions ferns are typically kept in.
⚠ MinorFern — Powdery Mildew on Ferns
A white, powdery coating develops on frond surfaces, particularly in humid but poorly-ventilated conditions.
⚠ MinorFern — Nutrient Deficiency Yellowing in Ferns
Fronds turn pale or yellow-green overall, sometimes with the oldest fronds affected first, despite otherwise correct light and watering.
⚠ ModerateFern — Cold Damage on Ferns
Fronds develop translucent, water-soaked patches that turn brown or black after cold exposure, often near a drafty window in winter.
⚠ MinorFern — Transplant Shock After Repotting a Fern
The plant wilts, drops fronds, or generally struggles for a period after being repotted or divided.
⚠ MinorFern Fronds Failing to Unfurl Properly
New fiddlehead-like fronds emerge but stall partway through unfurling, sometimes browning before fully opening.
⚠ MinorFern — Salt and Fertiliser Burn on Fern Frond Tips
Frond tips turn brown and crispy in a pattern distinct from general low-humidity browning, often following a recent fertiliser application.
⚠ MinorFern — Thrips on Ferns
Silvery streaks and small dark specks appear on fronds, with rasped, discoloured patches developing over time.
Fern Care Guide
Light, watering, humidity, fertilising, repotting and propagation — everything you need to keep your Fern thriving.
Full care guide →See how growers fixed these problems
Browse real Fern grow diaries from the community — treatments, timelines, and results.
Browse community diaries →Common Fern Questions
Why are my fern fronds turning brown and crispy?
Frond tips and edges turn brown, dry, and crispy, sometimes spreading across the whole frond in advanced cases.… Read the full guide →
Why is my fern dropping leaflets?
Fronds turn yellow, sometimes uniformly and sometimes starting at the base, before eventually browning and dying.… Read the full guide →
How do I raise humidity for a fern?
The plant wilts despite moist soil, and roots appear brown, mushy, and hollow rather than firm and white when checked.… Read the full guide →
Why is my fern wilting despite moist soil?
Individual leaflets or entire fronds drop from the plant, sometimes suddenly, reducing overall fullness.… Read the full guide →
