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Cydonia oblonga
Growing calendar
Typical timing for central Japan (Kanto region). Shift it for your own climate, and record your actual dates.
Guides
- How to Plant a Quince Tree: Site, Soil and Spacing
- Pruning a Quince Tree Without Cutting Off Next Year's Crop
- Quince Tree Care Through the Year: Water, Feed and Fruit
- Quince Tree Year: What to Do in Each Season
- Quince Pests and Diseases: Leaf Blight, Fireblight and Fruit Rots
- When to Pick Quince: Ripeness, Handling and Storage
Common problems
Start from what you can see on the plant.
Pests and diseases (12)
Problems recorded for this plant, most serious first.
Pear Rust
Disease
Round orange-red lesions form on the upper leaf surface with small black specks in the center. The underside of the lesion swells into hair-like tubes, and heavy infection causes leaf drop and loss of vigor.
Powdery Mildew
Disease
White patches appear scattered on the upper leaf surface at first, then the whole leaf is coated in a white powder. Leaves later yellow, brown and die back, and reduced photosynthesis cuts growth and yield.
Black Rot
Disease
V-shaped yellowing spreads inward from the leaf margins and the veins darken into a black network. As it advances the whole plant wilts and dies.
Citrus Melanose
Disease
Tiny dark brown specks are scattered over fruit and leaves, sometimes clustering into tear-streaks or a sandpaper texture. Heavy infection makes the rind rough and badly cuts appearance value.
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.
Sooty Mold
Disease
A thin black sooty mold spreads over the upper leaf surface, shoots and fruit. It does not invade the tissue itself, but it blocks photosynthesis and badly spoils appearance.
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.
Brown Rot
Disease
Blossoms brown and die, and round brown lesions on fruit expand rapidly. Grayish white powdery mold forms in concentric rings on the lesion and the fruit finally dries into a hard mummy.
