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Cucumis sativus
Growing calendar
Typical timing for central Japan (Kanto region). Shift it for your own climate, and record your actual dates.
Guides
- How to Plant Cucumbers: Spacing, Soil and Putting Up Supports
- Pruning Cucumbers: Removing the Lowest Side Shoots and Topping the Vine
- How Often to Water Cucumbers and When to Feed Them
- Cucumber Growing Calendar: What to Do Through the Season
- Cucumber Diseases and Pests: Keeping Mildew Out of the Crop
- When to Pick Cucumbers and Why They Come Out Curved
Common problems
Start from what you can see on the plant.
Varieties (241)
241 cucumber varieties have their own page, with days to maturity, growth habit, traits and uses.
Browse by growth habit
See all 241 cucumber varieties
Pests and diseases (67)
Problems recorded for this plant, most serious first.
Powdery Mildew
MajorDisease
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.
Cucurbit Leaf Beetle
MajorPest
Circular and arc-shaped feeding scars, as if drawn with a compass, line the leaves. On young seedlings the leaves can be eaten away entirely, badly setting back growth.
Brown Leaf Spot
MajorDisease
Small light brown to gray-brown spots form on the leaves and enlarge into irregular lesions. When they merge the whole leaf dies and plant vigor drops sharply.
Cucumber Mosaic Virus
MajorDisease
New leaves show a yellow-green mosaic, crinkle, and the whole plant becomes stunted. Fruit colors unevenly and grows misshapen.
Cucumber Green Mottle Mosaic
MajorDisease
Dark green blotches and raised mosaic appear on the leaves. The fruit surface becomes mottled and the flesh discolors, spoiling the flavor.
Gummy Stem Blight
MajorDisease
Gray-brown lesions form at stem nodes and the crown, exuding brown gum and splitting lengthwise. Round to V-shaped brown lesions form on leaves, dotted with small black fruiting bodies.
Fusarium Wilt of Cucurbits
MajorDisease
Part of the vine wilts during the day and eventually the whole plant dies. The stem splits lengthwise near the soil and exudes gum, and the vascular tissue is browned when cut.
Damping-off
MajorDisease
The stem pinches in at soil level, turning water-soaked to brown and thin, and the seedling topples over. Infection before emergence makes the stand uneven with missing plants.
Root-knot Nematode
MajorPest
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.
Spider Mites
MajorPest
Fine white stippling spreads across the upper leaf surface, and the leaf eventually whitens and dies back. In heavy infestations fine webbing appears on leaf undersides and shoot tips.
Bacterial Spot
MajorDisease
Small water-soaked spots appear on the leaves, later turning brown with yellowing around them. Fruit develops water-soaked or scabby spots from which rot spreads.
Downy Mildew
MajorDisease
Pale yellow to yellow-brown angular lesions form on the upper leaf surface with a gray-purple mold in the matching spot underneath. Lesions merge, the leaves die back and the plant declines early.
Curved Fruit
MajorDisorder
Fruit bends into a bow shape or pinches in partway so that it sizes unevenly. When curved fruit increases, overall plant growth is usually slowing too.
Anthracnose
CommonDisease
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.
