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Heuchera americana Ebony & Ivory Tiny Black Flies
eco Tiny Black Flies

Heuchera americana Ebony & Ivory – Tiny Black Flies

Why does your Heuchera americana Ebony & Ivory have tiny black flies? Diagnose the cause and fix it with our step-by-step guide.

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Jump to cause: Fungus Gnats Excessive Soil Moisture High Organic Matter Content

search Possible Causes

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Fungus Gnats

The tiny black flies are likely the adult stage of fungus gnats, which breed in the moist organic matter of the potting medium. Their larvae feed on decaying plant matter and fine root hairs, which can destabilize the rhizome of your Heuchera.

Very Common
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How to confirm: Set a yellow sticky trap near the soil surface to confirm the presence of flying adults.
build How to fix it
shopping_cart Recommended Products
1 Deploy yellow sticky traps to capture the adult flying gnats and break the breeding cycle.
Super Ninja Fungus Gnat Traps - 30 Pack
Super Ninja Fungus Gnat Traps - 30 Pack
30 pcs
$7
In Stock
2 Reduce watering frequency and allow the top inch of soil to dry out completely to eliminate the moist environment larvae need to survive.
GROWIT Soil Moisture Meter - Blue
GROWIT Soil Moisture Meter - Blue
Water Meters
$12
In Stock
3 Top-dress the soil with a layer of horticultural perlite or sand to create a dry barrier that prevents adults from laying eggs in the organic matter.
Legigo Perlite 15qt
Legigo Perlite 15qt
14.2 L • Perlite
$22
In Stock
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Excessive Soil Moisture

Heuchera americana prefers well-draining soil; constant moisture creates the perfect breeding ground for fungus gnat larvae. Overwatering can also lead to secondary fungal issues that attract more pests.

Very Common
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How to confirm: Stick your finger two inches into the soil to check if it remains damp for extended periods.
build How to fix it
shopping_cart Recommended Products
1 Reduce watering frequency and allow the top inch of soil to dry out completely before watering again to disrupt the fungus gnat breeding cycle.
GROWIT Soil Moisture Meter SMM-V3
GROWIT Soil Moisture Meter SMM-V3
Water Meters
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2 Apply yellow sticky traps near the soil surface to capture adult flies and prevent further egg-laying.
Super Ninja Fungus Gnat Traps - 30 Pack
Super Ninja Fungus Gnat Traps - 30 Pack
30 pcs
$7
In Stock
3 Repot the plant in a well-draining medium amended with perlite to improve aeration and prevent future moisture retention.
Legigo Perlite 15qt
Legigo Perlite 15qt
14.2 L • Perlite
$22
In Stock
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High Organic Matter Content

A potting mix too rich in uncomposted peat or compost provides an ideal food source for the larvae of small flies. This excess nutrient availability in the top layer of soil attracts adults to lay eggs.

Common
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How to confirm: Inspect the surface of the soil for a dark, silty, or overly decomposed texture.
build How to fix it
shopping_cart Recommended Products
1 Apply a biological control method to eliminate the adult flies and larvae by using a targeted spray.
Bonide Captain Jack's Neem Oil 32 oz
Bonide Captain Jack's Neem Oil 32 oz
0.9 L • 1 pcs • Organic
$10
In Stock
2 Reduce the moisture in the top layer of soil and use yellow sticky traps to capture flying adults.
Super Ninja Fungus Gnat Traps - 30 Pack
Super Ninja Fungus Gnat Traps - 30 Pack
30 pcs
$7
In Stock
3 Repot the plant in a less nutrient-dense, well-draining medium to remove the excess organic food source.
Espoma Organic Potting Soil Mix
Espoma Organic Potting Soil Mix
15.1 L
$22
In Stock

Other Heuchera americana Ebony & Ivory problems

Your plant might also be experiencing one of these issues:

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