Day length sensitivity.
Zinnia is facultative short-day plant. So, long day will delay blooming. Plug daylength Finish Day length Crop time Flower no.
Finish height/ size
Single flowers
Short days Very early High
Compact
Least
Early flowering Short days Flower initiation
Long days
Early
High
Compact
Least
Early flowering Short days Flower initiation
Most
Average
Mid/ Average Mid/ average
Long days Short days Mid
Large container
Long days Long days
Mid
Average
Least
Day lenth.
Public
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