Return to the Ornamental Grasses Forum | Post a Follow-Up

Northern sea oats under walnut?

Posted by saintsalty z5b MI (My Page) on
Sun, Aug 6, 06 at 2:57

Anyone have any experience with Chasmanthium latifolium under a black walnut? I planted it about four to six weeks ago and it was doing great but now it's beginning to show signs I've come to associate with walnut wither, i.e., yellowing leaves, brown and crispy at the edges from the bottom up.

There was some webbing at the crown, however, as well as some variegation along the length of a few leaves that I assume shouldn't be there and that aren't yellow (at least not yet). It's in a moist area--with all the rain and humidity in the past month, all the other plants haven't needed a drop from the hose, but this grass never seems to get enough water and is often drier than anything else in the area.

Am I simply not watering enough? Is it an insect issue? I should mention that some nearby hostas (always seem to be moist when I check) which are juglone tolerant are exhibiting some yellowing, though not to anywhere near the same degree. I'm new to gardening so any help would be appreciated.

Follow-Up Postings:

RE: Northern sea oats under walnut?

  • Posted by donn_ 7a, GSB, LI, NY (My Page) on
    Mon, Aug 7, 06 at 7:03

I did an hour of Googling, and can't find any references of Juglone tolerance in Chasmanthium. I must admit, there is precious little information about ornamental grasses and Walnut, except for Festuca, which seems to be tolerant.

It should be noted that as the Walnut tree grows larger, and expands it's root system, some Juglone tolerant plants lose their tolerance, because of the increase of Juglone. This may be what's happening to your Hosta.

RE: Northern sea oats under walnut?


I couldn't find anything online either. I checked the usual lists before I planted it, and they didn't mention NSO either way, so I knew there was a risk.

I'm new to gardening and don't know from pests and whatnot yet so I wondered if someone had previously tried it in order to either blame or excuse the Circle o' Death. ;)

It's still kicking though, so hopefully it'll stick around.

Anyway, thanks for the extensive Google


 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 Ornamental Grasses 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