Weedy Cymbidums - Knowledgebase Question

Camarillo, CA
Question by resandberg
June 24, 1999
I have Oxalis (or some other clover looking weed) in my Orchid pots. Can I use "Round Up", applied with a small brush or a Q-Tip, to eradicate the weed without harming the Orchid?

Answer from NGA
June 24, 1999


Oxalis, or woodsorrel, is resistant to glyphosate, the active ingredient in Round-Up. But your orchids would be highly susceptible to it. I'd suggest hand-pulling the weeds to preserve the health of your plants. Oxalis can spread through seeds and underground rhizomes, so keep the weeds pulled before they flower and set seed, and before the roots can get too firmly established. If the infestation gets out of hand, you may have to repot your orchids in fresh growing medium to eliminate all roots and seeds. If you do, be sure to place a thick layer of bark chips on the soil to keep weed seeds from getting a foothold.

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

« Return to the Garden Knowledgebase Homepage

Member Login:



[ Join now ]

Today's site banner is by greenappleagnes and is called "Winter's Arrival"