Troubleshooting
Hiba Arborvitae problems — and how to fix them
Hiba Arborvitae (Thujopsis dolabrata) 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.
Foliage scorch in dry or windy conditions
Browned foliage tips and inner branch dieback are common when humidity is low or cold desiccating winds are present. Site in a sheltered position; mulch to retain soil moisture; erect windbreaks in exposed gardens.
Root rot in poorly drained soil
Despite liking moisture, waterlogged roots quickly succumb to Phytophthora. Ensure free drainage below the rooting zone; raised planting on compacted sites can help.
Scale insects (Juniper scale)
Pale yellow or white crusty scales on foliage and stems cause yellowing and dieback. Treat with a horticultural oil spray in late spring when crawlers are active.
Prevent hiba arborvitae problems before they start
Most hiba arborvitae issues are care-mismatch, not bad luck. Dial in the basics:
Looking for hiba arborvitae in general rather than its problems? Read the full hiba arborvitae care guide — light, water, soil and feeding.
Hiba Arborvitae problems — FAQ
Why is my hiba arborvitae foliage scorch in dry or windy conditions?
Browned foliage tips and inner branch dieback are common when humidity is low or cold desiccating winds are present. Site in a sheltered position; mulch to retain soil moisture; erect windbreaks in exposed gardens.
Why is my hiba arborvitae root rot in poorly drained soil?
Despite liking moisture, waterlogged roots quickly succumb to Phytophthora. Ensure free drainage below the rooting zone; raised planting on compacted sites can help.
Why is my hiba arborvitae scale insects (juniper scale)?
Pale yellow or white crusty scales on foliage and stems cause yellowing and dieback. Treat with a horticultural oil spray in late spring when crawlers are active.