'Preen' and new bulbs/tubers

kris2001(6a - s.e.PA)March 9, 2009

Does Preen prevent /affect newly planted tulip bulbs & caladium tubers?

Any precautions i need to take?

Tks...Kris in se pa

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gardengal48

It has no effect on bulbs or any existing plants (even weeds for that matter). It is only effective on seeds and interrupts the germination process by preventing the development of a root system.

    Bookmark   March 9, 2009 at 9:24PM
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kris2001(6a - s.e.PA)

But I typed 'caladium' in here
http://www.preen.com/products/preen-garden-weed-preventer

and it says:
Preen Garden Weed Preventer is not recommended for use with caladium.

I wonder why?? I am worried. Should I use preen before I plant caladium tubers ?

    Bookmark   March 9, 2009 at 10:44PM
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Chemocurl zn5b/6a Indiana(zone 5/6)

and it says:
Preen Garden Weed Preventer is not recommended for use with caladium.
Well I am confused by them saying that. How about planting them and mulching them a bit, and after they emerge, using the Preen to keep weed seeds from germinating either in the soil, or in the mulch itself.

Do you start your caladiums early in pots to get a jump on the season as opposed to waiting until the ground warms up?

I see we are in the same zone.

Sue

    Bookmark   March 10, 2009 at 1:20AM
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kris2001(6a - s.e.PA)

Not sure if it will make a big diff potting the caladium since I have to keep in the basement which is always cool...How many tubers can I put in a 12 "pot? I have 50 tubers!

Yep I think mulch is safer. Will any type of mulch prevent weeds?

    Bookmark   March 10, 2009 at 9:49PM
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Chemocurl zn5b/6a Indiana(zone 5/6)

From this site:...for starting them inside...
Caladiums require a warm, moist soil. A minimum soil temperature of 70 F is preferred. If planted too early in the spring, cool soil temperatures will cause tubers to rot before they sprout. Some gardeners prefer to start tubers indoors in moist peat moss or potting soil in containers such as a shallow flat or flower pot. Barely cover tubers with soil and place the container in a warm room with bright light. Tubers should be started indoors approximately four weeks before planting outdoors.

According to this site our plant out date would be 'about' June 1st.

How many tubers can I put in a 12 "pot? I have 50 tubers!
Better yet, could you maybe start them in a big shallow pan, like an aluminum roaster, or a kitty litter pan? Could you set them outside on warm days, and set them inside at night?

Will any type of mulch prevent weeds?
Yes. I use and prefer shredded bark mulch as I can buy it reasonably priced locally by the pick-up truck load.

btw...you can add your location to your member profile so it will be shown automatically whenever you post...just as I am zone 5/6 S IN
The location goes in the one box allowed for the garden zone and you can update your Personal Information Page via the Member Pages link at the bottom of any GW page.

Your SE PA (zone 6A) location might be different (later) than my S IN (zone 6a) location.

hth

Sue

    Bookmark   March 11, 2009 at 9:04AM
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npublici(Zephyrhills,Fl)

Those of us who hybridize and manipulate genes in plants often use surflan or oryzalin to double chromosomes. If either are in preen,then many plants are affected adversly.
Del

    Bookmark   March 12, 2009 at 12:49PM
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Chemocurl zn5b/6a Indiana(zone 5/6)

hhhmmm...I just did a search on Preen ingredients and see the only ingredient in the Organic Preen is corn gluten.

I'll check my 'regular' old Preen container to see what the ingredients are in it.

Sue

Here is a link that might be useful: Organic Preen Vegetable Garden Weed Preventer

    Bookmark   March 13, 2009 at 12:39AM
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gardengal48

When kris first posted this, I did some searching of Preen labels and nowhere could I find where it stated it was not recommended for use with caladiums. So go figure!!

The active ingredient in Preen (the non-organic forumla) is trifluralin. This will have no effect on bulb growth. If you have any concerns, I'd start the caladiums in containers. In fact, I'd start them in containers anyway as container soil warms faster and you will start to encourage growth much earlier than if you planted the tubers directly in the ground. And just sinking the potted containers into your planting area - rather than planting the started tubers directly - will make it much easier when the time comes to lift them for storage in early fall.

Sue, if you wish to use the organic (CGM) formulation, don't buy Preen - you are paying a premium for it sold under that label. Just visit any feed store and you can obtain large sacks of corn gluten meal for a very low price. It is commonly used as an animal feed and is the same exact stuff as in the Preen container.

    Bookmark   March 13, 2009 at 9:40AM
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Chemocurl zn5b/6a Indiana(zone 5/6)

Sue, if you wish to use the organic (CGM) formulation, don't buy Preen - you are paying a premium for it sold under that label. Just visit any feed store and you can obtain large sacks of corn gluten meal for a very low price. It is commonly used as an animal feed and is the same exact stuff as in the Preen container.
Trust me when I say I buy very little name brand stuff, when there is usually a store brand or a generic version of about everything out there.

Thanks! I was wondering if it might be available in big bulk quantities somewhere. I think I read somewhere that someone bought the corn meal at a supermarket, but thought that too was certainly an expensive way to buy it. Now I know! I'm gonna let my fingers do the walkin' through the Yellow Pages later today and see where I can find it at the absolutely best price.

Sue

    Bookmark   March 13, 2009 at 9:55AM
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txmom(North Texas)

I also put in a few plants on the PREEN website. Everything I put in - it said it was not recommended for use with that plant.
i.e. crape myrtles, nandina, ligustrum.
Said it was OK for periwinkles...
Kinda scared me off it

    Bookmark   April 16, 2009 at 7:45PM
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sperritt

Has anyone actually used Preen around their caladiums, if so was there any harm to the plants?

    Bookmark   May 10, 2012 at 3:41PM
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