Name

Bud diameter

(mm)

The proportion of exposed petal to the total surface of petal

Petal color

S1

5

0

green

S2

6

Less than 1/5

Faint yellow

S3

8

1/4 ~ 1/3

Faint pink

S4

10

1/3 ~ 1/2

Rose purple

S5

12

1/2 ~ 2/3

Deep rose purple