Troubleshooting
Pond Cypress problems — and how to fix them
Pond Cypress (Taxodium ascendens) 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.
Chlorosis on alkaline soil
Yellow foliage in high-pH soils indicates iron deficiency. Acidify with elemental sulfur or use chelated iron foliar feeds. Pond Cypress strongly dislikes alkaline or chalky substrates — correct the soil pH before planting.
Cypress twig gall midge
Glyptoscelis sequoiae and related midges cause galls on shoot tips, leading to dieback of growing points. Prune and destroy affected tips in late winter. Healthy, vigorously growing trees in optimal wet conditions are more resilient.
Slow growth on dry sites
Planted away from water, Pond Cypress grows very slowly and may fail to thrive. This species is not adaptable to dry garden soils — a consistently moist to wet root run is essential for good performance.
Prevent pond cypress problems before they start
Most pond cypress issues are care-mismatch, not bad luck. Dial in the basics:
Looking for pond cypress in general rather than its problems? Read the full pond cypress care guide — light, water, soil and feeding.
Pond Cypress problems — FAQ
Why is my pond cypress chlorosis on alkaline soil?
Yellow foliage in high-pH soils indicates iron deficiency. Acidify with elemental sulfur or use chelated iron foliar feeds. Pond Cypress strongly dislikes alkaline or chalky substrates — correct the soil pH before planting.
Why is my pond cypress cypress twig gall midge?
Glyptoscelis sequoiae and related midges cause galls on shoot tips, leading to dieback of growing points. Prune and destroy affected tips in late winter. Healthy, vigorously growing trees in optimal wet conditions are more resilient.
Why is my pond cypress slow growth on dry sites?
Planted away from water, Pond Cypress grows very slowly and may fail to thrive. This species is not adaptable to dry garden soils — a consistently moist to wet root run is essential for good performance.