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California black oak
Quercus kelloggii
Budburst user
Mt Prospect,
Illinois
Mt Prospect,
Illinois
(Lat: 42.038422, Long: -87.963994)
April 21, 2026
Phenology observation
Leaves Unfolding
All leaves unfolded
All or most leaves are fully unfolded.
All leaves unfolded
All or most leaves are fully unfolded.
Flowers
Late Flowering
Most flowers have wilted or fallen off (over 95%) or most pollen has fallen.
Late Flowering
Most flowers have wilted or fallen off (over 95%) or most pollen has fallen.
Fruit
First Ripe Fruit
First fruits ripe (usually changed in color) or seeds dropping on three or more branches.
First Ripe Fruit
First fruits ripe (usually changed in color) or seeds dropping on three or more branches.
Autumn Leaf Color Change
All leaves changed color
All or most leaves have changed color.
All leaves changed color
All or most leaves have changed color.
Autumn Leaves Dropping
Early dropping
Only a few leaves have dropped (less than 5%).
Early dropping
Only a few leaves have dropped (less than 5%).
Notes
I couldn’t make much because I don’t have many plants near my house but I did notice how most of the leaves are changing colors and some flowers are growing
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