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Media Center

Photo Library: Growth Stages
Stage 3: R-4

The inflorescence begins to open. When viewed from directly above immature ray flowers are visible.



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Almost Pollination

Name: Almost Pollination
Description: A sunflower head in the R-4 growth stage about to open up and start pollinating.
ID Name: SUN258
Size: 226K

Almost Ready To Bloom

Name: Almost Ready To Bloom
Description: A sunflower head in the R-4 growth stage and a few days from blooming.
ID Name: SUN248
Size: 234K

 R-4 Top View

Name: R-4 Top View
Description: Sunflower plant in R-4 stage; Top view
ID Name: SUN111308I
Credits: NDSU Ext. Bulletin 25
Size: 86K

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