01 · Timing

When and how to begin

Direct sow after frost where plants can remain; protect new seedlings from birds if needed.

02 · Growing sequence

See the crop change before it happens.

Illustrated growth sequence for sunflower, from establishment through mature harvest.
  1. 01Match mature height to the site.
  2. 02Plant where tall stems will not shade shorter crops unexpectedly.
  3. 03Support giant varieties in exposed locations.
  4. 04Decide whether heads are for bouquets, edible seed, or wildlife.

03 · Below the surface

Give the roots their working volume.

Planting geometryDepth, roots, and final space
8–24 in final spacing
1 in

A strong taproot and wide anchors need depth, especially for tall varieties.

04 · Harvest

Know when it is ready

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

Still developing

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

Cut flowers when petals begin to open, or leave mature heads for seed and wildlife.

Illustrated growth sequence for sunflower, 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

Bird damageLodgingDowny mildew

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

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