Troubleshooting
Dwarf Sweet Flag problems — and how to fix them
Dwarf Sweet Flag (Acorus gramineus 'Pusillus') is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Browning leaf tips
The very fine foliage is highly sensitive to drought and dry air. Even brief drying of the substrate causes tip burn. Ensure permanently moist conditions and high humidity; trim browned tips neatly with fine scissors.
Algae growth in terrarium
In bright, humid terrariums, algae can coat the soil surface and lower leaves. Reduce light intensity slightly and ensure some air circulation to slow algal spread.
Overcrowding of the tiny clump
Despite slow growth, the dense clump eventually becomes root-bound. Lift and divide every 2–3 years, separating into smaller sections and replanting in fresh moist substrate to rejuvenate growth.
Prevent dwarf sweet flag problems before they start
Most dwarf sweet flag issues are care-mismatch, not bad luck. Dial in the basics:
Dwarf Sweet Flag problems — FAQ
Why is my dwarf sweet flag browning leaf tips?
The very fine foliage is highly sensitive to drought and dry air. Even brief drying of the substrate causes tip burn. Ensure permanently moist conditions and high humidity; trim browned tips neatly with fine scissors.
Why is my dwarf sweet flag algae growth in terrarium?
In bright, humid terrariums, algae can coat the soil surface and lower leaves. Reduce light intensity slightly and ensure some air circulation to slow algal spread.
Why is my dwarf sweet flag overcrowding of the tiny clump?
Despite slow growth, the dense clump eventually becomes root-bound. Lift and divide every 2–3 years, separating into smaller sections and replanting in fresh moist substrate to rejuvenate growth.