Control Of Evening Primrose - Knowledgebase Question

CA
Question by mmyw
May 29, 2001
I read that evening primrose (Oenothera) can be an invasive plant. Will it get as weedy as oxalis, or is it more like California poppy? Does it spread by a root system that makes it hard to control?

If I plant it in the garden what measure should I take to keep it under control?


Image
Answer from NGA
May 29, 2001

0

Oenothera speciosa, Mexican Evening Primrose is a perennial, native to the southwestern U. S. and Mexico. Plants grow about 1' tall and 3' wide and spread by underground rhizomes. It makes a good groundcover for dry slopes or parking strips but can become invasive where soil is regularly watered and growth is not checked. I'd compare it more to California poppy, in that it will spread in clumps and pop up where you least expect it. You can control the plants by cutting the roots on a annual basis (slip a shovel into the ground around the plant to sever roots), or by placing an underground barrier such as corregated fiberglass (much like you would control running bamboo). Oenothera won't overtake a yard in a single year, but the plants do require some regular control or they will get out of hand.

You must be signed in before you can post questions or answers. Click here to join!

« Return to the Garden Knowledgebase Homepage

Member Login:

Username:

Password:

[ Join now ]

Today's site banner is by Paul2032 and is called "Daisy with bug"