Table 2 Effect of GA₃ and melatonin on vegetative growth of two artichoke cultivars 110 DAT during the two growing seasons of 2017/2018 and 2018/2019

126.4 a

21.7 a

506 a

109.0 a

16.7 a

50.7 a

113.8 b

21.2 b

485 b

100.3 b

15.6 b

49.1 a

119.5 b

21.4 a

495ab

105.5 a

16.1ab

50.3 a

123.5 a

22.0 a

504 a

107.5 a

16.7 a

50.6 a

116.8 c

21.1 a

488 b

101.1 b

15.7 b

48.9 b

  IS

Melatonin

126.3 a

21.7 a

504 a

109.7 a

16.4 a

51.1 a

GA₃

129.7 a

22.0 a

513 a

112.8 a

17.5 a

51.4 a

Control

123.3 a

21.3 a

501 a

104.5 b

16.1 a

49.7 b

  R

Melatonin

112.7 a

21.0 a

486 a

101.3bc

15.8 a

49.5 b

GA₃

117.3 a

21.9 a

495 a

102.1bc

15.9 a

49.8 b

Control

110.2 a

20.8 a

474 a

97.6 c

15.2 a

48.1 c

120.0 a

21.0 a

519 a

111.7 a

17.9 a

49.2 a

105.6 b

18.7 b

493 b

103.3 b

17.2 a

46.5 b

112.3 b

20.0 a

507ab

108.7 a

17.7 a

48.0 a

115.8 a

20.6 a

519 a

109.3 a

17.9 a

48.8 a

110.4 c

19.0 b

493 b

104.6 b

17.0 a

46.8 b

  IS

Melatonin

119.7 a

21.5 a

518ab

113.3 a

18.1 a

49.5 a

GA₃

122.5 a

21.4 a

526 a

113.4 a

18.2 a

50.3 a

Control

117.9 a

20.1 a

512 b

108.5 a

17.3 a

47.8 a

  R

Melatonin

104.9bc

18.5 a

495 c

104.0 a

17.3 a

46.5 a

GA₃

109.1 b

19.8 a

502bc

105.2 a

17.5 a

47.3 a

Control

102.8 c

17.9 a

481 d

100.6 a

16.6 a

45.7 a