Return to the Mid-Atlantic Gardening Forum | Post a Follow-Up

How to amend clay for bearded irises?

Posted by glitterglass z7 (My Page) on
Sat, Sep 27, 08 at 14:18

Hi there,
I have posted some messages in the Iris forum as I prepare to plant Irises for the first time in my garden and I ran into a roadblock when one member told me that Bumper Crop, my usual go-to for amending the soil in my Washington DC brand red clay, is high in nitrogen and thus a potentially disastrous choice for irises. I have a special no-Nitrogen fertilizer from the grower and I've added gypsum to improve drainage, but it is also recommended that I add compost. Aside from the gypsum I have added nothing yet to the bed.

My question now is what sort of compost I should use for irises, and if there's a way to find one with low nitrogen content. I checked the Leafgro site since it produced locally and widely used here, but it provides no information.

If anyone has any insights on how they treat their soil, or if they have any experience with irises, I would love love to hear from you.

Any thoughts are appreciated. Thanks so much!

Follow-Up Postings:

RE: How to amend clay for bearded irises?

I used Leafgro and some peat moss for my iris beds, and they all seem happy after the first 18 months. I'll actually have to start separating some of them next year.

The real trick with clay soil in my area is to amend far enough away from the intended bed that you don't end up with a miniature lake when the rains come. Some iris like wet feet, but not everything does....

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Mid-Atlantic Gardening Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here