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Irises forum: Preen Question

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Views: 1329, Replies: 22 » Jump to the end
Name: Julia
Upstate NY (Zone 6a)
Clematis Daylilies Irises Region: New York Hummingbirder Seed Starter
Vegetable Grower I was one of the first 300 contributors to the plant database!
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JuliaNY
Oct 4, 2012 6:06 AM CST
After redoing a garden bed in preparation for planting, I spread Preen on top till I was ready to get my bulbs,peony and siberian iris in it and am now wondering if that was a wise thing to do. Confused Will Preen adversely affect them since I spread it on top before I planted?







Julia
Upstate NY
Zone 6
Name: Mary Ann
Kentucky
I was one of the first 300 contributors to the plant database! Hostas Hummingbirder Daylilies Birds Irises
Keeps Horses Region: Kentucky Farmer Container Gardener Region: United States of America
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Muddymitts
Oct 4, 2012 7:13 AM CST
I don't see how, Julia. Preen prevents germination -- and doesn't affect existing plants. Shrug!
Name: Cindi
Wichita, Kansas (Zone 7a)
Charter ATP Member Permaculture Roses Ponds Peonies Lilies
Irises Daylilies Dog Lover Beekeeper Garden Ideas: Master Level Plant and/or Seed Trader
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CindiKS
Oct 4, 2012 8:25 AM CST
I would be most concerned about the peony roots. Clear off the existing soil and bring in some that is uncontaminated for the peonies. You don't want the preen getting down by the roots which will be planted shallowly. Preen can cause some root pruning, or in other words, slow down growth of roots, and now is the time you want those peonies growing the new roots.
Preen is marketed as an inhibitor to seed germination, but you don't want it touching any roots, and peony roots may be shallow, or you may be stirring the preen deeper when you plant. Does that make sense?
The best way to handle new beds is weed them, (till or kill) then plant, then spread the preen.

Maybe Polly will come on here and advise you on the siberians. The bulbs will be fine.
Remember that children, marriages, and flower gardens reflect the kind of care they get.
H. Jackson Brown, Jr.
Name: Polly Kinsman
Hannibal, NY (Zone 6a)

Forum moderator Charter ATP Member Region: United States of America I helped plan and beta test the plant database. I was one of the first 300 contributors to the plant database! Plant Database Moderator
Irises Lilies Seller of Garden Stuff
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PollyK
Oct 4, 2012 8:30 AM CST

Moderator

Siberians will be absolutely fine. I use Preen in all my beds.

Never knew that, Cindi.
Name: Cindi
Wichita, Kansas (Zone 7a)
Charter ATP Member Permaculture Roses Ponds Peonies Lilies
Irises Daylilies Dog Lover Beekeeper Garden Ideas: Master Level Plant and/or Seed Trader
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CindiKS
Oct 4, 2012 9:13 AM CST
I used to put Preen (actually the landscaper equivalent) the way Julia did- before and after planting. My boss at the time saw that, blew up at me, and sent me to applicator training. They warned about the root-pruning effect. It's the reason the bags warn not to use it more often than every 90 days.
i think established plants could handle it accidentally touching the roots, but anything newly planted this time of year is going to have roots in active growth phase, and that will be retarded. I know it is not supposed to act as a growth retardant,....but it can. Won't kill the plants, but it won't do them any favors, either.

Remember that children, marriages, and flower gardens reflect the kind of care they get.
H. Jackson Brown, Jr.
[Last edited by CindiKS - Oct 4, 2012 9:15 AM (+)]
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Name: Polly Kinsman
Hannibal, NY (Zone 6a)

Forum moderator Charter ATP Member Region: United States of America I helped plan and beta test the plant database. I was one of the first 300 contributors to the plant database! Plant Database Moderator
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PollyK
Oct 4, 2012 9:15 AM CST

Moderator

Thanks for the info. I guess the 90 day schedule is about what I use. First thing the end of April/ first of May, and then when I replant and get the soil stirred up.
Name: Paul Smith
Pleasant Grove Utah
Grandchildren are my greatest joy.
Charter ATP Member Plant Lover: Loves 'em all! Plays in the sandbox Garden Procrastinator The WITWIT Badge Region: Utah
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Paul2032
Oct 4, 2012 9:20 AM CST
Great information.....
Paul Smith Pleasant Grove, Utah
Name: Julia
Upstate NY (Zone 6a)
Clematis Daylilies Irises Region: New York Hummingbirder Seed Starter
Vegetable Grower I was one of the first 300 contributors to the plant database!
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JuliaNY
Oct 4, 2012 10:27 AM CST
So if I don't spread the Preen down into the soil, I should be fine for the siberian iris and peonies?

Oddly, when I checked the Preen.com site they said that Preen was not compatible for crocus or daylilies. I posed a question on the AHS Robin (Daylily group)forum regarding other gardeners experience with spreading Preen with daylilies since the Preen site said daylilies are not compatible either with Preen. I grow alot of daylilies so you can understand my concern.

I may end up with a dead garden next spring *Blush* Blinking
Julia
Upstate NY
Zone 6
Name: Mary Ann
Kentucky
I was one of the first 300 contributors to the plant database! Hostas Hummingbirder Daylilies Birds Irises
Keeps Horses Region: Kentucky Farmer Container Gardener Region: United States of America
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Muddymitts
Oct 4, 2012 10:57 AM CST
Oh -- I hope not, Julia. Especially since I have my Daylilies mixed in with my Irises in several locations.

Polly -- I do the same thing -- plant my Iris rhizomes, then spread Preen, then water. I forgot to do that on a bed I planted in August -- I now have a bed full of annual weeds that will have to be hand-weeded. Can't take a chance on hitting the Iris leaves with Round-Up spray..............
Name: Polly Kinsman
Hannibal, NY (Zone 6a)

Forum moderator Charter ATP Member Region: United States of America I helped plan and beta test the plant database. I was one of the first 300 contributors to the plant database! Plant Database Moderator
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PollyK
Oct 4, 2012 11:05 AM CST

Moderator

I promise it won't hurt the sibs, I've been using it for so many years. Please let us know what they say about the daylilies.
Name: Polly Kinsman
Hannibal, NY (Zone 6a)

Forum moderator Charter ATP Member Region: United States of America I helped plan and beta test the plant database. I was one of the first 300 contributors to the plant database! Plant Database Moderator
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PollyK
Oct 4, 2012 11:10 AM CST

Moderator

On the Preen site it says daylilies ARE compatible with Preen. I know crocuses are such tiny bulbs it probably does inhibit them sprouting, like a seed.

http://www.preen.com/products/preen-weed-preventer/plants
Name: Julia
Upstate NY (Zone 6a)
Clematis Daylilies Irises Region: New York Hummingbirder Seed Starter
Vegetable Grower I was one of the first 300 contributors to the plant database!
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JuliaNY
Oct 4, 2012 1:15 PM CST
Thanks Polly. I appreciate the feedback on the iris.



Julia
Upstate NY
Zone 6
Name: Betty
Bakersfield, CA
Charter ATP Member I was one of the first 300 contributors to the plant database! Birds The WITWIT Badge Region: United States of America Roses
Irises Cat Lover Daylilies Region: California Garden Ideas: Level 1
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Betja
Oct 4, 2012 1:51 PM CST
I've spread Preen around my established daylilies for the last couple of years and have had no problems.

Betty
Name: Mary Ann
Kentucky
I was one of the first 300 contributors to the plant database! Hostas Hummingbirder Daylilies Birds Irises
Keeps Horses Region: Kentucky Farmer Container Gardener Region: United States of America
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Muddymitts
Oct 4, 2012 6:15 PM CST
Me too.
Name: Julia
Upstate NY (Zone 6a)
Clematis Daylilies Irises Region: New York Hummingbirder Seed Starter
Vegetable Grower I was one of the first 300 contributors to the plant database!
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JuliaNY
Oct 4, 2012 7:26 PM CST
So far it doesn't seem to be an issue with Preen around established daylilies that are already in the ground and keeping with the recommended dosage however there may be some cause for cautious when planting seedlings. Just advice I was given and I have no personal experience since I haven't used Preen on my newly planted seedlings.

I'll check peony forum to see if anyone has used it before they planted their bareroot.
Julia
Upstate NY
Zone 6
Name: Jo Ann Gentle
Pittsford NY (Zone 6a)
Dahlias Charter ATP Member I was one of the first 300 contributors to the plant database! Cat Lover Heucheras Hellebores
Enjoys or suffers cold winters Container Gardener Birds Region: New York Irises Garden Ideas: Level 1
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ge1836
Oct 7, 2012 3:43 AM CST
Shoot!! I wish I had read this a month ago. I have a garden full of weeds around new iris plants.
I rely on annual poppies germinating in some areas so I dont Preen in that garden. Is it too late to Preen now? or doesnt it have any effect on established weeds that are blooming and about to set seed for next year? I am talking about the "sour clover " stuff that just grows everywhere.
Name: Arlyn
Whiteside County, Illinois (Zone 5a)
crowrita1
Oct 7, 2012 6:13 AM CST
No, It only works to kill seeds while germinating, won't work on the weeds themselves. Active life is 3 months for "flower" preen and 1 month for "vegatable" preen, so effect will be over before spring gets here. Can't think of the righht name of the weed you're talking about...light green ,3-leafed "clover" looking, small yellow flowers!? We've got it here also, call it "sour grass". Don't know why....doesn't look like grass? Anyway ,preen would be best used, in your case, early spring, before anything germinates....but....it will stop those Poppies,too!...Arlyn
Name: Jo Ann Gentle
Pittsford NY (Zone 6a)
Dahlias Charter ATP Member I was one of the first 300 contributors to the plant database! Cat Lover Heucheras Hellebores
Enjoys or suffers cold winters Container Gardener Birds Region: New York Irises Garden Ideas: Level 1
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ge1836
Oct 7, 2012 6:40 AM CST
Thanks for the info. I will apply in late April then.There is nothing growing.I dont sow poppies in that area.
Name: Arlyn
Whiteside County, Illinois (Zone 5a)
crowrita1
Oct 7, 2012 7:42 AM CST
Just remembered the rightname of that weed...woodsorrel...when I was young,never forgot anything..now that I'm old...can't remember anything Confused !!...Arlyn
Name: Jo Ann Gentle
Pittsford NY (Zone 6a)
Dahlias Charter ATP Member I was one of the first 300 contributors to the plant database! Cat Lover Heucheras Hellebores
Enjoys or suffers cold winters Container Gardener Birds Region: New York Irises Garden Ideas: Level 1
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ge1836
Oct 7, 2012 8:14 AM CST
It IS Woodsorel.
I belong to a Communitu Supported Agriculture farm share group.
They had Woodsorel on the ptable as a freebie one week.
Its a huge long story but I will just say not all CSA's are created equal and this one will not have me as a member next year.

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