Black Brain-Like Fungus in Seattle Lawn

A Seattle homeowner describes spongy, black, brain/spaghetti-like fungal growths that regrow after removal.

Possible Identities

• Inky caps — threadlike stalks, auto-deliquesce to black ink
• Puffballs — massive growths, black at spore release
• Stinkhorns — dark heads, foul odor
• Slime mold — slimy, not spongy, not a true fungus

Management

• Baking soda: anecdotal, not research-backed
• Fungicides: temporary, fungi survive aggressively
• Best: aerate, fertilize, water properly — favor turf over fungi
• Mechanical removal (rake/mow)

Seattle Context

Climate favors fungi. They appear quickly, disappear quickly. Focus on turf health.