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Cactaceae spp.
Growing calendar
Typical timing for central Japan (Kanto region). Shift it for your own climate, and record your actual dates.
Guides
- Where to Keep a Cactus: Sun, Airflow, and a Cold Winter Spot
- How Often to Water a Cactus: Soak in Summer, Nothing in Winter
- Repotting a Cactus: Pot Size, Gritty Mix, and Handling Spines
- Cactus Care Month by Month: The Growing Season and the Dry Rest
- Cactus Problems: Rot, Corking, Mealybugs, and Sunburn
- How to Propagate a Cactus: Offsets, Cuttings, and Seed
Common problems
Start from what you can see on the plant.
Pests and diseases (16)
Problems recorded for this plant, most serious first.
Late Blight
Disease
Dark green water-soaked lesions appear on the leaves and expand quickly into brown dead tissue. White mold forms on the underside and at the lesion edge, and dark brown lesions spread to stems and fruit.
Crown Gall
Disease
Irregular galls form at the crown and on the roots, gradually enlarging and turning woody. They block the flow of water and nutrients, so the plant loses vigor and may die.
Anthracnose
Disease
Light brown to dark brown round lesions with sharp margins form on leaves and fruit, slightly sunken in the center. In wet weather salmon-pink slimy spore masses ooze out on the lesions.
Root-knot Nematode
Pest
The plant wilts in the daytime and does not recover with feeding or watering. Pull it up and the roots carry beaded chains of galls of varying size with few fine roots.
Gray Mold
Disease
Water-soaked brown lesions form on flowers, fruit and leaves, densely covered by a fuzzy gray mold. Fruit rots and drops, and decay continues in storage after harvest.
Ring Rot
Disease
The bark of branches and trunk becomes rough and warty, serving as the inoculum source. Fruit develops round brown lesions that soften and rot in concentric rings.
