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Knock-Out Gnats™ Granules

Save seedlings from fungus gnats

Fungus gnats (often mistaken for fruit flies) love to lay their eggs in humus-rich organic soil and potting media. With Knock-Out Gnats granules, the larvae ingest the larvicide and die before they can harm your plants!
#3440
4 oz (makes 15-125 gallons)
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$29.99
Product Details
  • Season: both Spring & Fall
Shipping Information

Plants will be shipped at the proper planting time for your area of the country during the shipping timeframes outlined below:

Spring 2018 Shipping Schedule
  Zones   Sweet Potatoes Bareroot Roses Tomatoes & Peppers  Potatoes  Tender Annuals Onion Plants All other Perennials & Potted Plants
1A-4A 5/22 - 6/8 4/17 - 6/1 5/14 - 6/1 3/27 - 6/15 4/30 - 6/8 4/10 - 5/11 5/1 - 6/8
4B 5/22 - 6/8 4/17 - 6/1 5/14 - 6/1 3/27 - 6/15 4/30 - 6/8 4/3 - 5/11 5/1 - 6/8
5A 5/15 - 6/8 4/3 - 6/1 5/14 - 6/1 3/6 - 6/15 4/30 - 6/8 3/27 - 5/11 4/3 - 6/8
5B 5/1 - 6/8 3/20 - 6/1 5/14 - 6/1 3/6 - 6/15 4/30 - 6/8 3/27 - 5/11 3/20 - 6/8
6A 5/1 - 6/8 3/6 - 6/1 4/23 - 6/1 3/6 - 6/15 4/30 - 6/8 3/6 - 5/11 3/6 - 6/8
6B 5/1 - 6/8 3/6 - 6/1 4/23 - 6/1 3/6 - 6/15 4/30 - 6/8 2/27 - 5/11 3/6 - 6/8
7A 5/1 - 6/8 2/27 - 6/1 4/23 - 6/1 2/27 - 6/15 4/2 - 6/8 2/20 - 5/11 2/27 - 6/8
7B 5/1 - 6/8 2/27 - 6/1 4/2 - 6/1 2/27 - 6/15 4/2 - 6/8 2/13 - 5/11 2/27 - 6/8
8A & B 4/24 - 6/8 2/20 - 6/1 4/2 - 6/1 2/20 - 6/15 4/2 - 6/8 1/30 - 5/11 2/20 - 5/18
9A & B 4/24 - 6/8 1/23 - 6/1 4/2 - 6/1 2/13 - 6/15 4/2 - 6/8 1/2 - 5/11 2/13 - 5/18
10A & B 4/17 - 6/8 1/23 - 6/1 4/2 - 6/1 2/13 - 6/15 4/2 - 6/8 1/2 - 5/11 2/13 - 5/18
Last Order Date 6/4/2018 5/28/2018 5/28/2018 6/11/2018 6/4/2018 5/7/2018 1A-7B: 6/4/2018
8A-10B: 5/14/2018

Spring 2018 Insects Shipping Schedule
Zones Lacewings, Lady Beetles
& Encapsulated Earthworms
Nematodes
1A 5/12 - 6/15 5/15 - 6/15
1B - 2A 5/15 - 6/15 5/15 - 6/15
2B - 3B 5/1 - 6/15 5/1 - 6/15
4A - 6A 4/17 - 6/15 4/17 - 6/15
6B - 7A 4/10 - 6/15 4/10 - 6/15
7B - 8B 3/13 - 6/15 3/13 - 6/15
9A - 10B 2/27 - 6/15 2/27 - 6/15
Last Order Date 6/11/18 6/11/18

Shipping Note:

The type of product you order or the weather in our area or yours may affect the anticipated shipping schedule.

Trees and shrubs are kept in the nursery row until fully dormant for optimum stress protection.

In all cases, we choose the fastest, most efficient way to send your order—via the U.S. Postal Service or United Parcel Service. Large orders may be shipped in more than one package.

Please note that we cannot ship outside of the continental United States.

Ratings & Reviews

Ratings & Reviews

Write a review
no more gnats!
Jan 23, 2016  |  By Megan Lim
Review star icon Review star icon Review star icon Review star icon Review star icon
My worm compost bin was infested with fungus gnats and I couldn't get rid of them! I spent months trying to kill hem but it wasn't enough. 3 applications of knock out gnats and the gnats were gone for good without harming the worms!
Love this product
Jun 23, 2013  |  By mark
Review star icon Review star icon Review star icon Review star icon Review star icon
I work in a sealed office building (cannot open the windows). Over the years people brought in gnats with their plants. Since the office is sealed, natural predators cannot get at the gnats. I found this product here when desperate for something to knock down the gnats. I had been warned I would have to remove my plants otherwise. It worked quickly. Periodically I would refresh it with a simple watering of this product. I used it on the plants of some coworkers when they let me. I ask management to authorize me to use it on the other plants in the office. Still waiting for that. But at least management knows this product exists. Without question it kills the baby gnats breeding in the soil of the plants. Here back for more of it.
knock out gnats
Feb 26, 2013  |  By Rebecca
Review star icon Review star icon Review star icon Review star icon Review star icon
This product is very useful to me, please continue to allow it to ship out to the state of California. I have a severe problem with gnats and the larva need to be controlled. I still have some of it and I noticed a major decrease in the gnats after I used this product within two days. I want to order more in the future to send here to California. Thank you.

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