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Apr 26, 2018 5:26 PM CST
Name: Dave
Southern wisconsin (Zone 5b)
Japanese Maples Plant and/or Seed Trader Seed Starter Pollen collector Peonies Lilies
Irises Hybridizer Hummingbirder Dog Lover Daylilies Clematis
Wondering if anyone uses Preen. And good or bad?
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Apr 26, 2018 5:29 PM CST
Moderator
Name: Connie
Willamette Valley OR (Zone 8a)
Forum moderator Region: Pacific Northwest Sedums Sempervivums Lilies Hybridizer
Plant Database Moderator I was one of the first 300 contributors to the plant database! Charter ATP Member Pollen collector Plant Identifier Celebrating Gardening: 2015
I do. It has been a big help. I try to get it applied right before an expected rain so it gets watered in.
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Apr 26, 2018 5:45 PM CST
Name: Deb
Planet Earth (Zone 8b)
Region: Pacific Northwest Million Pollinator Garden Challenge Garden Ideas: Master Level
If I understand the literature correctly, 100% organic Preen is simply corn gluten which binds with and coats seeds to prevent them from sprouting. Most other Preen products contain trifluralin, an herbicide that is highly toxic to aquatic wildlife. Some contain isoxaben, 2-4-D, mecoprop-p, dicamba, and/or dithiopyr. You'd have to research each of these chemicals to determine your comfort level using them. I've never used Preen, so can't speak to its effectiveness.
I want to live in a world where the chicken can cross the road without its motives being questioned.
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Apr 26, 2018 6:56 PM CST
Name: Rick R.
Minneapolis, MN, USA zone 4
Garden Photography I was one of the first 300 contributors to the plant database! Garden Sages Hybridizer Region: Minnesota Seed Starter
The WITWIT Badge Million Pollinator Garden Challenge Plant Identifier
Careful, you won't be able to eat the bulbs if you use chemicals! Big Grin
When the debate is lost, slander becomes the tool of the losers. - Socrates
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Apr 26, 2018 7:28 PM CST
Name: Mac
Still here (Zone 6a)
Ex zones 4b, 8b, 9a, 9b
Cat Lover Region: Ukraine Birds Hummingbirder Butterflies Frogs and Toads
Vermiculture Critters Allowed Vegetable Grower Canning and food preservation Annuals Morning Glories
Deb, the Preen Vegetable Garden Weed Preventer sold on Amazon and labeled Organic:
https://www.amazon.com/dp/B000I1R2A2/
says in the production that Preen Vegetable Garden Weed Preventer contains corn gluten meal but does not list any other ingredients.
Slava Ukraini!

The aboriginal peoples and many cultures throughout the world share a common respect for nature and the universe, and all of the life that it holds. We could learn much from them!
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Apr 26, 2018 8:34 PM CST
Name: Deb
Planet Earth (Zone 8b)
Region: Pacific Northwest Million Pollinator Garden Challenge Garden Ideas: Master Level
Mac, one of these days I will remember to include citations of where I find information. I got this NOT from a Preen site or vendor of Preen, but from somewhere I consider reputable. It I knew how to check my history, I could likely figure it out. But alas. Leftwood, I guess I don't 'get' your joke (?). Were we talking bulbs? Oh, this is posted in the lily forum. I don't follow specific forums, just threads that catch my eye. My mistake. I would still advise using caution as it appears there are several chemicals which may or may not be used in different Preen formulations and I'm always a proponent of less poison on the planet.
I want to live in a world where the chicken can cross the road without its motives being questioned.
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Apr 27, 2018 4:42 AM CST
Name: Mac
Still here (Zone 6a)
Ex zones 4b, 8b, 9a, 9b
Cat Lover Region: Ukraine Birds Hummingbirder Butterflies Frogs and Toads
Vermiculture Critters Allowed Vegetable Grower Canning and food preservation Annuals Morning Glories
Deb, your research on Preen was very informative Smiling . I'm not surprised by how little information the sellers provide. And I'm all onboard with less poison on the planet Thumbs up .
Slava Ukraini!

The aboriginal peoples and many cultures throughout the world share a common respect for nature and the universe, and all of the life that it holds. We could learn much from them!
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