Ask a Question forum: Is my New York Aster outcompeting New York Ironweed?

Views: 295, Replies: 3 » Jump to the end

zs91
May 1, 2017 8:13 PM CST
I live in southeastern Pennsylvania and I've had a native plant garden for about five years now. Since I've started, I've had New York Ironweed and New York Aster. They are both well established and the New York Aster has spread through a lot of the garden, while the ironweed sticks to the same area every year. This year, the New York Aster has spread to the area where the New York Ironweed comes up and I haven't seen any sign of the ironweed. The ironweed in all previous years has always come up in the same area about 2 feet in diameter. The ironweed is always very healthy and grows over 6 feet tall with nice blooms that attract a ton of birds and butterflies. My question is (1) is it possible that the New York Aster has taken over the spot where the New York Ironweed would come in and, in essence, killed it off in just one spring, and (2) is it too early for me to see signs of the New York Ironweed . I don't remember when the Ironweed usually appears, so maybe I just need to have more patience Smiling Any help on this would be greatly appreciated!
Name: stone
near Macon Georgia (USA) (Zone 8a)
Plant Identifier Garden Sages Million Pollinator Garden Challenge
Image
stone
May 3, 2017 7:39 AM CST
tall ironweed (vernonia altissima) is a late starter, but asters do spread a lot...
Also... I've read that asters may kill other plants. Unfortunately I can't find an article right now.

The good news.... Is that if you thin the asters.... A lot.... You should see ironweed seedlings a plenty.... That is.... If you avoided cutting them back in the autumn....

zs91
May 3, 2017 3:29 PM CST
Thanks for the reply! I only cut back my ironweed last week so I will thin the aster and hopefully see some ironweed seedlings. I'll let you know about the success or not!
Name: stone
near Macon Georgia (USA) (Zone 8a)
Plant Identifier Garden Sages Million Pollinator Garden Challenge
Image
stone
May 3, 2017 4:01 PM CST
The word is allelopathy.

Everybody talks about black walnut, and that's sad... lots of plants are allopathic.

Here's an article I just found...
http://gardeninggrannysgardenp...

You know, I wouldn't have cut back the dead stalks until I saw evidence of the ironweed coming back...
I'm a big fan of those dead stalks... they let me know where the late emerging plants are, and keep me from trying to plant something else in that 'empty' spot.

« Garden.org Homepage
« Back to the top
« Forums List
« Ask a Question forum
Only the members of the Members group may reply to this thread.

Member Login:

Username:

Password:

[ Join now ]

Today's site banner is by plantmanager and is called "Aloe Sinkatana"