Troubleshooting
American Sweet Flag problems — and how to fix them
American Sweet Flag (Acorus americanus) is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Leaf tip browning (drought scorch)
The most common problem in cultivation — brown leaf tips indicate the soil has dried out or been too warm; move to a wetter position or stand the pot in a tray of water and trim off brown tips with clean scissors.
Vine weevil larvae (Otiorhynchus sulcatus)
Larvae feed on the rhizomes of container-grown specimens, causing sudden wilting; drench pots with a nematode biological control (Steinernema kraussei) in early autumn to target grubs before they cause serious damage.
Prevent american sweet flag problems before they start
Most american sweet flag issues are care-mismatch, not bad luck. Dial in the basics:
American Sweet Flag problems — FAQ
Why is my american sweet flag leaf tip browning (drought scorch)?
The most common problem in cultivation — brown leaf tips indicate the soil has dried out or been too warm; move to a wetter position or stand the pot in a tray of water and trim off brown tips with clean scissors.
Why is my american sweet flag vine weevil larvae (otiorhynchus sulcatus)?
Larvae feed on the rhizomes of container-grown specimens, causing sudden wilting; drench pots with a nematode biological control (Steinernema kraussei) in early autumn to target grubs before they cause serious damage.