Vegetation years

Budding stage

Flowering stage

Fruit ripening stage

Soil temperature,

˚C

Stem height, cm

Rhizome length,

cm

Soil temperature,

˚C

Stem height, cm

Rhizome length,

cm

Soil temperature,

˚C

Rhizome length,

cm

1

12.4

15.8 ± 0.66

10.4 ± 0.38

15.7

29.4 ± 0.50

11.2 ± 0.45

19.9

14.5 ± 0,

2

8.3

17.1 ± 0.27

9.1 ± 0.57

12.6

31.7 ± 0.39

10.2 ± 0.23

17.2

13.7 ± 0,

3

12.7

15.2 ± 0.40

8.7 ± 0.81

14.9

29.0 ± 0.48

9.7 ± 0.40

17.0

12.8 ± 0,