Troubleshooting
Spanish Juniper problems — and how to fix them
Spanish Juniper (Juniperus thurifera) 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.
Juniper blight (Phomopsis / Kabatina)
Tip dieback with reddish-brown discolouration is caused by Phomopsis or Kabatina fungi, typically following wet or humid conditions. Prune and destroy affected shoots, improve air circulation, and avoid overhead irrigation. Fungicide sprays in spring can help on severely affected plants.
Root rot in wet soils
Spanish Juniper is entirely intolerant of waterlogged or poorly drained soils. Persistent wet roots rapidly lead to Phytophthora root rot and tree death. Ensure excellent drainage and never site in low-lying or irrigated areas.
Juniper scale
Carulaspis juniperi (juniper scale) can cause yellow, thin foliage and progressive branch dieback. Look for small white or grey crusty scales on stems. Treat with horticultural oil in late spring when crawlers are active, or prune out heavily infested sections.
Prevent spanish juniper problems before they start
Most spanish juniper issues are care-mismatch, not bad luck. Dial in the basics:
Looking for spanish juniper in general rather than its problems? Read the full spanish juniper care guide — light, water, soil and feeding.
Spanish Juniper problems — FAQ
Why is my spanish juniper juniper blight (phomopsis / kabatina)?
Tip dieback with reddish-brown discolouration is caused by Phomopsis or Kabatina fungi, typically following wet or humid conditions. Prune and destroy affected shoots, improve air circulation, and avoid overhead irrigation. Fungicide sprays in spring can help on severely affected plants.
Why is my spanish juniper root rot in wet soils?
Spanish Juniper is entirely intolerant of waterlogged or poorly drained soils. Persistent wet roots rapidly lead to Phytophthora root rot and tree death. Ensure excellent drainage and never site in low-lying or irrigated areas.
Why is my spanish juniper juniper scale?
Carulaspis juniperi (juniper scale) can cause yellow, thin foliage and progressive branch dieback. Look for small white or grey crusty scales on stems. Treat with horticultural oil in late spring when crawlers are active, or prune out heavily infested sections.