The Dahlia Society has classifications based on bloom size. An imperial tree dahlia is in the BB class.
AA is 10 inches.
A is 8-10inches.
B is 6-8 inches.
BB is 4-6 inches
M is up to 4 inches
BA is over 3.5 inches
MB is over 2 inches but less than 3.5 inches
P is up to 2 inches.
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The imperial tree dahlia is a perennial plant that belongs to the Asteraceae family.
The scientific name for Dahlia hybrids is Dahlia x hybrida, indicating that they are a hybrid species within the Dahlia genus. They are part of the family Asteraceae, which is commonly known as the daisy family.
Dahlia is not a cereal or grain. It is a member of the aster/daisy family.
Black Dahlia died on 1947-01-15.
Dahlia like well drained soil with organic matter.
Dahlia is cold sensitive so the foliage turns black when it gets cold.