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Re: CULT: Preemergent

Anner -- Earl Roberts, who introduced me to hybridizing, was using Preen before me. He planted his seeds in the ground, and so did I before moving to the Washington area. And yes, they do keep changing the packaging. I ought to mention a couple of facts about Preen and other preemergents that work like it does.

1. As I noted in an earlier message, Preen's granules form a kind of chemical crust in the soil that prevents certain weeds from germinating. When you treat the bed with Preen before planting, then water it in and let it dry before planting, the planting disturbs that crust, and the weeds that appear will tend to cluster around your plants.

2. On the other hand, if you plant immediately after applying the Preen, and water-in only after planting, you avoid that problem. BUT, you will probably breath in more chemical dust if you do it that way. So, I like to water it in first, time permitting, and pull a few pesky weeds later on. -- Griff

----- Original Message ----- From: <ChatOWhitehall@aol.com>
To: <iris@hort.net>
Sent: Sunday, July 16, 2006 9:44 AM
Subject: Re: [iris] CULT: Preemergent

In a message dated 7/15/2006 6:55:33 PM Eastern Standard Time,
jgcrump@cox.net writes:

I have used Preen for 32 years.

I did not realize the stuff had been around that long, Griff. I don't think
I'd ever noticed it in the local trade until the 1990s. Perhaps the company
did a media blitz or repackaged or something.

Some of these useful products are surprizingly longtoothed. I've got
magazines from the 930s with Wilt-pruf ads in them.
> Cordially,

Anner Whitehead
Richmond VA USA USDA Zone 7--Urban

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