Chinotto Orange Decline in Container: Root Rot Diagnosis and Recovery Steps

Second Chinotto Case: Diagnosing Root Problems in a Newly Potted Tree

Another chinotto orange (Citrus myrtifolia) in a container showing leaf drop, yellowing, and flower drop after heavy rains in the SF Bay Area. The pattern is classic: root rot from waterlogged soil.

Diagnostic Steps

1. Check drainage: Pot must have multiple large holes. Water should exit freely within minutes of watering.
2. Inspect roots: Gently remove root ball. Healthy roots = firm, white/cream. Rotted roots = black, mushy, slough off when tugged.
3. Smell test: Rotten roots have a foul, anaerobic odor (like your "smelly water").

Recovery Protocol

1. Stop watering until soil is nearly dry at 2-3 inch depth.
2. Repot if roots are damaged: Remove all black/mushy roots. Repot in fresh citrus mix (1:1:1 peat:perlite:coarse sand).
3. Ensure pot elevation: Use pot feet—never let pot sit in a saucer of water.
4. Protect from rain: Move under eaves or porch during wet periods.
5. Monitor: New growth in 2-3 weeks indicates recovery. Continued decline = replacement needed.

Prevention for Container Citrus in Wet Climates

• Use fabric pots (smart pots) for superior drainage and air pruning.
• Add 20% pumice or lava rock to potting mix.
• Top-dress with coarse gravel to reduce splash-borne pathogens.
• Consider a rain shelter or movable cart for winter.

The Bay Area's unusual March/April rains overwhelmed your new tree's root system. With corrected drainage and protection, chinotto oranges are resilient and should recover if caught early.