Garlic Yellowing and Wilting: White Rot or Basal Rot?

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GardenSays

Best match: White rot. This one can't be cured — confirm quickly.

Best match: White rot
Severity: Can't be cured
Causes checked: 2

Based on leaves yellowing and wilting on the lower leaves with moist soil, the closest match is white rot. Confirm it against the actual plant: Yellowing and wilting starting mid-season, then white, fluffy cotton-like fungal growth at the bulb or crown with tiny black specks (sclerotia) embedded in it.

White rot is one of the possibilities and can't be cured — rule it out first: Yellowing and wilting starting mid-season, then white, fluffy cotton-like fungal growth at the bulb or crown with tiny black specks (sclerotia) embedded in it.
This is a symptom-pattern match from your written description, not a lab diagnosis. If the plant is collapsing over days (not weeks), treat it as the worst plausible cause until ruled out.
A clear, well-lit photo (or a sample bag) to your county Extension office resolves this faster and more reliably than guessing from a description — especially when the possibilities need different treatment.

Do this this week

1.Confirm it first: Yellowing and wilting starting mid-season, then white, fluffy cotton-like fungal growth at the bulb or crown with tiny black specks (sclerotia) embedded in it.
2.No cure. Remove and destroy the whole plant plus surrounding soil if possible — the sclerotia persist in soil for years, so don't plant alliums there again soon.
3.Collapsing fast (days, not weeks)? Photograph it and check with your county extension before treating

Calculated result · 1 verified source · Checked 2026-07-17 · How we decide

The link reopens this exact calculation.

Why

What to do: No cure. Remove and destroy the whole plant plus surrounding soil if possible — the sclerotia persist in soil for years, so don't plant alliums there again soon.

If that doesn't match what you see, work down the list: Basal rot (Fusarium) (stunted, yellowing foliage with tip burn; pull a bulb and check the base — firm brown rot starting at the basal plate, bulb feels soft when squeezed.).

A symptom tree ranks causes by how well your conditions match each cause's known pattern — the distinguishing signs are how you confirm it on the actual plant, not a lab result.
Most leaf problems trace to water, weather, or common leaf-spot fungi; true plant-killers are rarer but worth ruling out first.

When this doesn't apply

If the plant is collapsing fast (days, not weeks), treat it as the most severe possibility on the list until proven otherwise.
Multiple symptoms at once usually means the top cause here plus plain stress — fix watering first, then re-check.

How this was calculated

1. SymptomSource guidance
Garlic: leaves yellowing and wilting — 2 known causes evaluated (extension-sourced)
2. Your conditionsCalculated result
Location on plant: lower; soil: moist. Causes whose known pattern matches these conditions rank higher — this narrows the list, it doesn't identify anything.
3. 1. White rotmatch score 4Calculated result
Distinguishing signs: Yellowing and wilting starting mid-season, then white, fluffy cotton-like fungal growth at the bulb or crown with tiny black specks (sclerotia) embedded in it.
4. 2. Basal rot (Fusarium)match score 1Calculated result
Distinguishing signs: Stunted, yellowing foliage with tip burn; pull a bulb and check the base — firm brown rot starting at the basal plate, bulb feels soft when squeezed.

Data sources

University of Minnesota Extension — Basal rot of onion and garlic — White rot symptoms appear mid-season to harvest: yellowing and wilting of leaves, followed by white cottony mycelial growth on the bulb/crown with small black sclerotia. Basal rot (Fusarium): stunted yellow foliage, tip burn, firm brown rot starting at the basal plate and moving up the bulb; infected bulbs feel soft. (checked 2026-07-17)

What changes this answer

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Your next decisions

When to Plant Garlic

The fall planting window — anchored to your FIRST frost, not spring