Table 4 Effect of GA₃ and melatonin on main head quality of two artichoke cultivars during the two growing seasons of 2017/2018 and 2018/2019

301.0 a

102.8 a

99.2 a

59.5 a

264.6 b

95.7 b

86.7 b

50.5 b

283.6 b

99.3 a

93.3 a

54.9ab

285.4 a

100.2 a

93.9 a

56.4 a

279.4 c

95.5 b

91.8 b

53.8 b

  IS

Melatonin

301.4 a

102.7ab

99.8 a

59.3 a

GA₃

302.5 a

104.2 a

100.4 a

60.9 a

Control

299.1 a

101.5 b

97.5 b

58.2 a

  R

Melatonin

265.7 b

95.9 c

86.7 c

50.4 a

GA₃

268.3 b

96.2 c

87.3 c

51.8 a

Control

259.7 c

95.1 c

86.0 c

49.3 a

296.7 a

100.8 a

100.0 a

60.0 a

268.2 b

95.6 b

87.0 b

51.9 b

283.6 a

98.5 a

93.7 a

56.2 a

283.9 a

98.7 a

94.0 a

56.3 a

279.9 b

97.5 a

92.9 b

55.3 a

  IS

Melatonin

297.1 a

100.9 a

100.2 a

60.2 a

GA₃

297.8 a

101.4 a

100.8 a

60.3 a

Control

295.3 a

100.1 a

99.1 a

59.5 a

  R

Melatonin

270.1 b

96.0 b

87.2 b

52.2 a

GA₃

269.9 b

95.9 b

87.1 b

52.2 a

Control

264.5 c

94.8 b

86.7 b

51.1 a