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Allium fistulosum
Growing calendar
Typical timing for central Japan (Kanto region). Shift it for your own climate, and record your actual dates.
Guides
- How to Grow Welsh Onions from Seed: Sowing, Germination and Transplant Size
- Planting Welsh Onions: Trench Depth, Spacing and Rooting a Supermarket Bunch
- Earthing Up Welsh Onions: How to Grow a Long White Shank
- Welsh Onion Problems: Thrips, Rust, Leaf Miner and Rot at the Base
- Harvesting Welsh Onions: Cut and Come Again Instead of Pulling
- Welsh Onion Year Round Care: Dividing, Cutting and Overwintering a Clump
Common problems
Start from what you can see on the plant.
Pests and diseases (43)
Problems recorded for this plant, most serious first.
Rust
MajorDisease
Small raised orange-yellow to red-brown pustules form on both leaf surfaces, then rupture and release powdery spores. Heavy infection yellows the leaves and kills them early.
Onion Thrips
MajorPest
Fine white stippled scars run in vertical lines along the leaf surface, and the whole leaf eventually turns whitish. Growth stops and both yield and quality suffer.
Leek Moth
MajorPest
White grazed scars and small holes line the leaf surface, and splitting the leaf reveals larvae inside. Damaged leaves snap easily and die back.
Onion Yellow Dwarf
CommonDisease
Yellow streaks appear along the leaves, which twist and lodge easily. The whole plant is stunted and the bulb and leaf sheaths bulk up very poorly.
