01 · Timing

When and how to begin

Choose short-, intermediate-, or long-day onions suited to the latitude, then plant seed, sets, or transplants at the locally recommended time.

02 · Growing sequence

See the crop change before it happens.

Illustrated growth sequence for onion, from establishment through mature harvest.
  1. 01Match day length to the region.
  2. 02Keep shallow roots weed-free.
  3. 03Water consistently while bulbs enlarge.
  4. 04Reduce water as mature tops decline.

03 · Below the surface

Give the roots their working volume.

Planting geometryDepth, roots, and final space
4–6 in final spacing
¼–½ in

Shallow roots explore a narrow soil band, so weeds and surface drought compete quickly.

04 · Harvest

Know when it is ready

Visual decisionRead the plant, not only the date
Illustrated growth sequence for onion, from establishment through mature harvest.
Not yet

Still developing

Illustrated growth sequence for onion, from establishment through mature harvest.
Ready

Lift mature bulbs after tops fall and begin to dry, then cure only varieties intended for storage.

Illustrated growth sequence for onion, from establishment through mature harvest.
Past prime

Quality or vigor may decline when harvest is delayed beyond the intended stage.

05 · Common trouble

Inspect before you treat

Onion thripsNeck rotSmall bulbs

Symptoms can share several causes. Check moisture, recent weather, and the complete plant before applying a treatment.

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